Intensity and Power - Talking
•
1 like•1,583 views
You need 0.229 watts of power to talk over an IMAX movie that is playing at 80 dB loud in a dome-shaped theater that is 5 stories tall with a diameter of 27 meters. The maximum distance from the speakers to the audience is 13.5 meters. To calculate the required power, the document first uses the relationship between decibels and intensity to determine that the movie's intensity is 10-4 W/m2. It then uses the formula that intensity equals power divided by 4πr2, where r is the maximum distance of 13.5 meters, to calculate that a power of 0.229 watts is needed.
Report
Share
Report
Share
Download to read offline
Recommended
Talking - Intensity and Power
You work at Science World and need to provide instructions to the audience before an IMAX movie starts in the large dome theatre. The theatre is 5 stories tall with a diameter of 27 meters. To be heard over the movie, which produces sound at 80 dB, you would need to project your voice with a power of approximately 2.290 watts. This is calculated using the relationships between decibel levels and sound intensity, and the formula that relates sound intensity to power output over a given radius in an isotropic sound field.
Lo1
The document discusses measuring sound levels in decibels and the relationships between sound intensity, power, and distance from the source. It defines that intensity is measured in decibels, with 0 dB being near total silence. The logarithmic decibel scale is used to compare sound intensities. An example problem calculates that a sound intensity of 5 W/m^2 measured 5 meters from stage speakers would equal 126.99 dB, below the threshold of pain, and the speakers would be radiating about 1,570 watts of power.
Physics 101 LO Sound Waves
The document discusses sound intensity and decibels. It provides formulas for calculating intensity given power and distance. Decibels are used to measure sound intensity on a logarithmic scale. An example problem is given about calculating the distance needed to be safe from ear damage from a barking dog. The summary calculates that at 10m the bark is 100dB, still harmful at 25m at 92dB, and would need to be 14.26km away to be at the non-harmful level of 85dB.
1.4.2cosinelaw
The cosine law describes the relationship between illuminance (E), luminous intensity (l), distance from the light source (d), and the angle of incidence (θ). Specifically, it states that illuminance (E) equals the luminous intensity (l) divided by the distance from the light source squared (d2), multiplied by the cosine of the angle of incidence (Cos θ).
3.7 calculation of tristimulus values from measured reflectance values
1) The document discusses measured reflectance (Rλ) values, which represent the fraction of light reflected by a sample at each wavelength, and how these values are independent of the light source used to measure them.
2) It explains that to calculate the actual amount of light reflected at each wavelength, the measured Rλ values need to be multiplied by the energy (Eλ) of the light source at that wavelength.
3) The total amount of light reflected across the visible spectrum is calculated by summing the amounts reflected (Eλ x Rλ) at each wavelength between 380-760nm.
3.9 addition to the cie system
The CIE system of color specification established in 1931 has remained largely unchanged, but some additions have been made over time, including:
- Defining standard illuminants D and supplementary standard observer based on 10-degree field of view in 1964.
- Recommending reference standards for measuring reflectance factors.
- Specifying measurement geometries such as 45/0 and 0/45 viewing configurations.
Standard illuminants
The document discusses standards for illuminants established by the Commission Internationale de l'Éclairage (CIE) in 1931. It describes standard illuminants A, B, C, and D, which were defined to represent common lighting conditions. Standard illuminant A approximates indoor tungsten lighting, while B and C represented daylight but were replaced by the D illuminants in 1963 as better models for different phases of daylight. Standard illuminant D65 is now widely accepted as approximating average daylight.
3.4 properties of additive mixture
The document discusses additive mixing of colored lights and some key properties:
1) We can match a wide range of colors using mixtures of primaries like red, green, and blue lights.
2) Grassman's law from 1853 states that stimuli of the same color will produce identical effects in mixtures regardless of spectral composition.
3) Modern colorimetry is based on experimental properties of additive mixtures of colored lights established over a century ago. Subsequent experiments have refined the conditions where simple laws hold.
Recommended
Talking - Intensity and Power
You work at Science World and need to provide instructions to the audience before an IMAX movie starts in the large dome theatre. The theatre is 5 stories tall with a diameter of 27 meters. To be heard over the movie, which produces sound at 80 dB, you would need to project your voice with a power of approximately 2.290 watts. This is calculated using the relationships between decibel levels and sound intensity, and the formula that relates sound intensity to power output over a given radius in an isotropic sound field.
Lo1
The document discusses measuring sound levels in decibels and the relationships between sound intensity, power, and distance from the source. It defines that intensity is measured in decibels, with 0 dB being near total silence. The logarithmic decibel scale is used to compare sound intensities. An example problem calculates that a sound intensity of 5 W/m^2 measured 5 meters from stage speakers would equal 126.99 dB, below the threshold of pain, and the speakers would be radiating about 1,570 watts of power.
Physics 101 LO Sound Waves
The document discusses sound intensity and decibels. It provides formulas for calculating intensity given power and distance. Decibels are used to measure sound intensity on a logarithmic scale. An example problem is given about calculating the distance needed to be safe from ear damage from a barking dog. The summary calculates that at 10m the bark is 100dB, still harmful at 25m at 92dB, and would need to be 14.26km away to be at the non-harmful level of 85dB.
1.4.2cosinelaw
The cosine law describes the relationship between illuminance (E), luminous intensity (l), distance from the light source (d), and the angle of incidence (θ). Specifically, it states that illuminance (E) equals the luminous intensity (l) divided by the distance from the light source squared (d2), multiplied by the cosine of the angle of incidence (Cos θ).
3.7 calculation of tristimulus values from measured reflectance values
1) The document discusses measured reflectance (Rλ) values, which represent the fraction of light reflected by a sample at each wavelength, and how these values are independent of the light source used to measure them.
2) It explains that to calculate the actual amount of light reflected at each wavelength, the measured Rλ values need to be multiplied by the energy (Eλ) of the light source at that wavelength.
3) The total amount of light reflected across the visible spectrum is calculated by summing the amounts reflected (Eλ x Rλ) at each wavelength between 380-760nm.
3.9 addition to the cie system
The CIE system of color specification established in 1931 has remained largely unchanged, but some additions have been made over time, including:
- Defining standard illuminants D and supplementary standard observer based on 10-degree field of view in 1964.
- Recommending reference standards for measuring reflectance factors.
- Specifying measurement geometries such as 45/0 and 0/45 viewing configurations.
Standard illuminants
The document discusses standards for illuminants established by the Commission Internationale de l'Éclairage (CIE) in 1931. It describes standard illuminants A, B, C, and D, which were defined to represent common lighting conditions. Standard illuminant A approximates indoor tungsten lighting, while B and C represented daylight but were replaced by the D illuminants in 1963 as better models for different phases of daylight. Standard illuminant D65 is now widely accepted as approximating average daylight.
3.4 properties of additive mixture
The document discusses additive mixing of colored lights and some key properties:
1) We can match a wide range of colors using mixtures of primaries like red, green, and blue lights.
2) Grassman's law from 1853 states that stimuli of the same color will produce identical effects in mixtures regardless of spectral composition.
3) Modern colorimetry is based on experimental properties of additive mixtures of colored lights established over a century ago. Subsequent experiments have refined the conditions where simple laws hold.
Wind energy I. Lesson 9. Control strategies
The document discusses control strategies for wind turbines. It begins by outlining the four major steps in developing a wind turbine control system: 1) define clear control objectives, 2) select suitable control strategies, 3) decide how to realize the control strategy, and 4) design the controller. The objectives of wind turbine controls are then defined as maximizing energy capture while preventing excessive mechanical loads and ensuring power quality. The document goes on to explain how the aerodynamic torque on the turbine changes based on wind speed and rotor speed.
Pitch and Range in Wind Instruments - Learning Object 6
This document discusses how wind instruments produce sound through air vibrations forming standing waves inside cylindrical tubes. It explains that most wind instruments can be approximated as open-open or open-closed tubes. The document compares how the flute and clarinet differ as open-open and closed-open tubes respectively, affecting their possible note ranges. It also explores how instrument length impacts the lowest playable frequency and how an octave relationship is formed between instruments like the flute and piccolo. Sample problems demonstrate how leaks or breaks could limit an instrument's range by changing the effective tube length.
2. enhanced pitch control characteristics of a dfig based wind turbine using ...
This document discusses enhancing the pitch control characteristics of a DFIG (doubly fed induction generator) based wind turbine using ANFIS (adaptive neuro fuzzy inference system). It compares the pitch control, mechanical torque characteristics, and rotor speed with and without ANFIS control. When using ANFIS, the characteristics are improved both with speed error and the difference of speed and power errors as inputs, but they are enhanced most with the latter. The simulation is conducted in MATLAB/Simulink and results show ANFIS control improves the pitch control characteristics of a DFIG based wind turbine.
Wind energy ppt
Wind turbines harness the kinetic energy of wind by using blades attached to a rotor to spin a generator that creates electricity. The rotor is connected to a main drive shaft that spins the generator when the wind turns the blades. Wind turbines are mounted on tall towers to take advantage of faster, less turbulent winds higher above the ground. The electricity generated can power a single home or building or be distributed more widely by connecting the turbines to an electricity grid.
Wind turbine technology kid wind project
The document discusses different types of wind turbines, including their components and how they work. It covers vertical axis and horizontal axis turbines, comparing their advantages and disadvantages. It also discusses factors that impact turbine performance like airfoil design, blade composition, number of blades, drive trains, controls, towers, and more. The goal is to introduce students to the science of wind power through hands-on activities.
Wind Energy
A quick view through aerodynamics, parts, towers and control of wind turbines.
Please do comment the suggestions and corrections...
Wind Turbine
This document summarizes different aspects of wind turbines. It discusses how wind power is calculated based on air density, swept area of the turbine, and wind speed. It describes the main types of wind turbines according to power output and design, including horizontal axis and vertical axis turbines. It also summarizes different blade configurations based on the number of blades and how blade design factors like twist and taper optimize power capture. Additionally, it outlines considerations for siting wind turbines and control mechanisms used in turbines of different sizes to regulate power in high winds.
Equation with logs
The document discusses using logarithms to solve exponential growth problems by isolating the variable exponent through algebraic manipulation of logarithmic properties. It provides an example of using logarithms to find the time it will take for a population growing exponentially to reach a given size based on its original population and growth rate. The document also discusses applying these concepts to solve other applied problems involving exponential growth, decay, or intensities of sound waves over distances.
Defense - Sound space rendering based on the virtual Sound space rendering ba...
This document summarizes a thesis on developing and implementing an auditory display technique called ADVISE (Auditory Display based on the Virtual Sphere Model).
The document first reviews ADVISE and how it can render spatial audio for both virtual and real scenes using techniques like higher-order ambisonics and binaural rendering. It then reviews the adaptive rectangular decomposition (ARD) method for computational room acoustics simulation.
The document outlines the objective of improving ADVISE by developing a complete room acoustics program using ARD and integrating it into ADVISE. It describes implementing ADVISE to demonstrate spatial audio rendering for a sample music hall scene in Unity. Frequency limitations and computational costs of the
3-Basic Acoustics.ppt
The document provides an overview of basic acoustics concepts including quantification of sound through measurements of sound pressure, intensity, and power. It discusses acoustic variables such as sound pressure level and intensity level which are expressed on a logarithmic decibel scale. Key concepts covered include the inverse square law describing how sound pressure/intensity decreases with distance from a point source, effects of multiple sound sources, relationships between frequency and sound perception, and directionality of sound sources. Measurement techniques and standards are also summarized.
Antenna parameters part 1: Frequency bands, Gain and Radiation Pattern
This is part of an internal document that that gives an overview of the properties of antennas for non-engineers.
We have divided the document into different posts where we discus each of the parameters:
Frequency bands, gain and radiation pattern
Polarisation
Input Impedance and VSWR
Port to port Isolation and Cross-polarisation
Power Handling ability
Antenna “Specmanship”
Where applicable we have added some videos explaining the properties discussed.
Measuring sound levels lo4
This document discusses measuring sound levels and determining if they are harmful to hearing. It defines a sound wave as a longitudinal wave that creates areas of high and low pressure when propagating. Sound levels are measured in decibels (dB), which uses a logarithmic scale to compare sound intensities. The document provides a key formula for calculating dB from sound intensity and uses this to analyze a problem about a nightclub measuring 2.5 W/m2. Applying the formula, it determines the nightclub's sound level is 113.98 dB, which is considered harmful since 85 dB or above can damage hearing.
Decibels
The document defines decibels as a unit used to express the intensity of sound waves equal to 20 times the common logarithm of the pressure produced by the sound wave compared to a reference pressure. It explains that the logarithmic scale is used because the change in sound is only noticeable using powers of 10 and it takes about 10 times the intensity for a sound to be perceived as twice as loud. Additionally, it provides guidelines that spending more than 30 minutes at 110 dB can cause permanent damage and recommends using ear plugs if needed.
Lecture Notes: EEEE6490345 RF and Microwave Electronics - Noise In Two-Port ...
The document discusses noise in two-port networks. It defines noise figure as the ratio of signal-to-noise ratio at the input to the output. Noise figure depends on the noise added by the two-port network and any internal noise. The noise figure of multiple cascaded stages is calculated by adding the noise figure of each stage while accounting for the gain of previous stages. Noise circles are plotted on the Smith chart to visualize the noise figure as a function of source impedance matching. Examples calculate the noise figure of amplifier cascades and radio frequency receivers.
Mj2420512054
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
Grade 11, U4 L7-Sound Intensity
This document provides information about sound and hearing:
- Noise lacks a consistent pitch or repeating waveform, while music has sounds that are whole number multiples of the lowest frequency.
- Loudness is subjective, while sound intensity is measured in watts per square meter (W/m2) or decibels (dB), using a logarithmic scale. Common sound intensities are given.
- Echolocation allows bats and dolphins to detect objects using sound wave reflections, while sonar determines underwater distances by timing sound wave echoes.
- The typical human hearing range is 20 Hz to 20,000 Hz, but it decreases with age. Tests can check one's hearing range.
- Practice questions review concepts like
EXPONENTIAL HORN - DESIGN,COMPUTER MODELING, CONSTRUCTION, MEASUREMENTS AND D...
Design, Advanced Computer Modeling, Measurements and Discussion of a high efficiency tri-amplified speaker consisting of a low frequency vented enclosure (Bass Reflex), a hybrid conical/exponential midrange horn and a compression tweeter. The bass enclosure is modeled using BassBox Pro. The horn is 3D modeled using Hornresp. The measurements are made with SoundEasy with a full MLS (minimum length signal) implementation using the Ground Plane method and the Near-Field method.
Learning Object 1
The document discusses decibels and how they are used to measure sound intensity levels relative to a reference level of 1000Hz. It provides the formula for calculating sound intensity level in decibels and uses it to solve a sample problem comparing the sound intensity of a library to a bedroom. The key points are:
- Decibels provide a logarithmic scale to compare sound intensities to a reference level
- The reference level for sound is 1000Hz
- The formula is used to determine if a student's estimate of a 7 times difference in sound intensities between a library and bedroom matches the given 10dB intensity level difference. It is determined that the student is wrong since 10dB corresponds to a 10 times, not 7 times
Fundamental of Noise.ppt
This document provides an overview of fundamentals of noise. It defines sound as acoustic waves that propagate through a medium, with noise being unwanted or disturbing sound. Key concepts covered include:
- Sound is measured by properties like frequency, sound pressure level, intensity level, and power level.
- The decibel scale is used to quantify sound levels in a way that reflects human perception.
- Sound can be analyzed by its intensity or pressure levels across frequency bands like octave or one-third octave bands.
- The relationship between sound intensity, pressure, and power is explained. Combining sound from multiple sources is also addressed.
Sharlene Leurig - Enabling Onsite Water Use with Net Zero Water
Sharlene Leurig - Enabling Onsite Water Use with Net Zero WaterTexas Alliance of Groundwater Districts
Presented at June 6-7 Texas Alliance of Groundwater Districts Business MeetingESA/ACT Science Coffee: Diego Blas - Gravitational wave detection with orbita...
ESA/ACT Science Coffee: Diego Blas - Gravitational wave detection with orbita...Advanced-Concepts-Team
Presentation in the Science Coffee of the Advanced Concepts Team of the European Space Agency on the 07.06.2024.
Speaker: Diego Blas (IFAE/ICREA)
Title: Gravitational wave detection with orbital motion of Moon and artificial
Abstract:
In this talk I will describe some recent ideas to find gravitational waves from supermassive black holes or of primordial origin by studying their secular effect on the orbital motion of the Moon or satellites that are laser ranged.More Related Content
Viewers also liked
Wind energy I. Lesson 9. Control strategies
The document discusses control strategies for wind turbines. It begins by outlining the four major steps in developing a wind turbine control system: 1) define clear control objectives, 2) select suitable control strategies, 3) decide how to realize the control strategy, and 4) design the controller. The objectives of wind turbine controls are then defined as maximizing energy capture while preventing excessive mechanical loads and ensuring power quality. The document goes on to explain how the aerodynamic torque on the turbine changes based on wind speed and rotor speed.
Pitch and Range in Wind Instruments - Learning Object 6
This document discusses how wind instruments produce sound through air vibrations forming standing waves inside cylindrical tubes. It explains that most wind instruments can be approximated as open-open or open-closed tubes. The document compares how the flute and clarinet differ as open-open and closed-open tubes respectively, affecting their possible note ranges. It also explores how instrument length impacts the lowest playable frequency and how an octave relationship is formed between instruments like the flute and piccolo. Sample problems demonstrate how leaks or breaks could limit an instrument's range by changing the effective tube length.
2. enhanced pitch control characteristics of a dfig based wind turbine using ...
This document discusses enhancing the pitch control characteristics of a DFIG (doubly fed induction generator) based wind turbine using ANFIS (adaptive neuro fuzzy inference system). It compares the pitch control, mechanical torque characteristics, and rotor speed with and without ANFIS control. When using ANFIS, the characteristics are improved both with speed error and the difference of speed and power errors as inputs, but they are enhanced most with the latter. The simulation is conducted in MATLAB/Simulink and results show ANFIS control improves the pitch control characteristics of a DFIG based wind turbine.
Wind energy ppt
Wind turbines harness the kinetic energy of wind by using blades attached to a rotor to spin a generator that creates electricity. The rotor is connected to a main drive shaft that spins the generator when the wind turns the blades. Wind turbines are mounted on tall towers to take advantage of faster, less turbulent winds higher above the ground. The electricity generated can power a single home or building or be distributed more widely by connecting the turbines to an electricity grid.
Wind turbine technology kid wind project
The document discusses different types of wind turbines, including their components and how they work. It covers vertical axis and horizontal axis turbines, comparing their advantages and disadvantages. It also discusses factors that impact turbine performance like airfoil design, blade composition, number of blades, drive trains, controls, towers, and more. The goal is to introduce students to the science of wind power through hands-on activities.
Wind Energy
A quick view through aerodynamics, parts, towers and control of wind turbines.
Please do comment the suggestions and corrections...
Wind Turbine
This document summarizes different aspects of wind turbines. It discusses how wind power is calculated based on air density, swept area of the turbine, and wind speed. It describes the main types of wind turbines according to power output and design, including horizontal axis and vertical axis turbines. It also summarizes different blade configurations based on the number of blades and how blade design factors like twist and taper optimize power capture. Additionally, it outlines considerations for siting wind turbines and control mechanisms used in turbines of different sizes to regulate power in high winds.
Viewers also liked (7)
Pitch and Range in Wind Instruments - Learning Object 6
Pitch and Range in Wind Instruments - Learning Object 6
2. enhanced pitch control characteristics of a dfig based wind turbine using ...
2. enhanced pitch control characteristics of a dfig based wind turbine using ...
Similar to Intensity and Power - Talking
Equation with logs
The document discusses using logarithms to solve exponential growth problems by isolating the variable exponent through algebraic manipulation of logarithmic properties. It provides an example of using logarithms to find the time it will take for a population growing exponentially to reach a given size based on its original population and growth rate. The document also discusses applying these concepts to solve other applied problems involving exponential growth, decay, or intensities of sound waves over distances.
Defense - Sound space rendering based on the virtual Sound space rendering ba...
This document summarizes a thesis on developing and implementing an auditory display technique called ADVISE (Auditory Display based on the Virtual Sphere Model).
The document first reviews ADVISE and how it can render spatial audio for both virtual and real scenes using techniques like higher-order ambisonics and binaural rendering. It then reviews the adaptive rectangular decomposition (ARD) method for computational room acoustics simulation.
The document outlines the objective of improving ADVISE by developing a complete room acoustics program using ARD and integrating it into ADVISE. It describes implementing ADVISE to demonstrate spatial audio rendering for a sample music hall scene in Unity. Frequency limitations and computational costs of the
3-Basic Acoustics.ppt
The document provides an overview of basic acoustics concepts including quantification of sound through measurements of sound pressure, intensity, and power. It discusses acoustic variables such as sound pressure level and intensity level which are expressed on a logarithmic decibel scale. Key concepts covered include the inverse square law describing how sound pressure/intensity decreases with distance from a point source, effects of multiple sound sources, relationships between frequency and sound perception, and directionality of sound sources. Measurement techniques and standards are also summarized.
Antenna parameters part 1: Frequency bands, Gain and Radiation Pattern
This is part of an internal document that that gives an overview of the properties of antennas for non-engineers.
We have divided the document into different posts where we discus each of the parameters:
Frequency bands, gain and radiation pattern
Polarisation
Input Impedance and VSWR
Port to port Isolation and Cross-polarisation
Power Handling ability
Antenna “Specmanship”
Where applicable we have added some videos explaining the properties discussed.
Measuring sound levels lo4
This document discusses measuring sound levels and determining if they are harmful to hearing. It defines a sound wave as a longitudinal wave that creates areas of high and low pressure when propagating. Sound levels are measured in decibels (dB), which uses a logarithmic scale to compare sound intensities. The document provides a key formula for calculating dB from sound intensity and uses this to analyze a problem about a nightclub measuring 2.5 W/m2. Applying the formula, it determines the nightclub's sound level is 113.98 dB, which is considered harmful since 85 dB or above can damage hearing.
Decibels
The document defines decibels as a unit used to express the intensity of sound waves equal to 20 times the common logarithm of the pressure produced by the sound wave compared to a reference pressure. It explains that the logarithmic scale is used because the change in sound is only noticeable using powers of 10 and it takes about 10 times the intensity for a sound to be perceived as twice as loud. Additionally, it provides guidelines that spending more than 30 minutes at 110 dB can cause permanent damage and recommends using ear plugs if needed.
Lecture Notes: EEEE6490345 RF and Microwave Electronics - Noise In Two-Port ...
The document discusses noise in two-port networks. It defines noise figure as the ratio of signal-to-noise ratio at the input to the output. Noise figure depends on the noise added by the two-port network and any internal noise. The noise figure of multiple cascaded stages is calculated by adding the noise figure of each stage while accounting for the gain of previous stages. Noise circles are plotted on the Smith chart to visualize the noise figure as a function of source impedance matching. Examples calculate the noise figure of amplifier cascades and radio frequency receivers.
Mj2420512054
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
Grade 11, U4 L7-Sound Intensity
This document provides information about sound and hearing:
- Noise lacks a consistent pitch or repeating waveform, while music has sounds that are whole number multiples of the lowest frequency.
- Loudness is subjective, while sound intensity is measured in watts per square meter (W/m2) or decibels (dB), using a logarithmic scale. Common sound intensities are given.
- Echolocation allows bats and dolphins to detect objects using sound wave reflections, while sonar determines underwater distances by timing sound wave echoes.
- The typical human hearing range is 20 Hz to 20,000 Hz, but it decreases with age. Tests can check one's hearing range.
- Practice questions review concepts like
EXPONENTIAL HORN - DESIGN,COMPUTER MODELING, CONSTRUCTION, MEASUREMENTS AND D...
Design, Advanced Computer Modeling, Measurements and Discussion of a high efficiency tri-amplified speaker consisting of a low frequency vented enclosure (Bass Reflex), a hybrid conical/exponential midrange horn and a compression tweeter. The bass enclosure is modeled using BassBox Pro. The horn is 3D modeled using Hornresp. The measurements are made with SoundEasy with a full MLS (minimum length signal) implementation using the Ground Plane method and the Near-Field method.
Learning Object 1
The document discusses decibels and how they are used to measure sound intensity levels relative to a reference level of 1000Hz. It provides the formula for calculating sound intensity level in decibels and uses it to solve a sample problem comparing the sound intensity of a library to a bedroom. The key points are:
- Decibels provide a logarithmic scale to compare sound intensities to a reference level
- The reference level for sound is 1000Hz
- The formula is used to determine if a student's estimate of a 7 times difference in sound intensities between a library and bedroom matches the given 10dB intensity level difference. It is determined that the student is wrong since 10dB corresponds to a 10 times, not 7 times
Fundamental of Noise.ppt
This document provides an overview of fundamentals of noise. It defines sound as acoustic waves that propagate through a medium, with noise being unwanted or disturbing sound. Key concepts covered include:
- Sound is measured by properties like frequency, sound pressure level, intensity level, and power level.
- The decibel scale is used to quantify sound levels in a way that reflects human perception.
- Sound can be analyzed by its intensity or pressure levels across frequency bands like octave or one-third octave bands.
- The relationship between sound intensity, pressure, and power is explained. Combining sound from multiple sources is also addressed.
Similar to Intensity and Power - Talking (12)
Defense - Sound space rendering based on the virtual Sound space rendering ba...
Defense - Sound space rendering based on the virtual Sound space rendering ba...
Antenna parameters part 1: Frequency bands, Gain and Radiation Pattern
Antenna parameters part 1: Frequency bands, Gain and Radiation Pattern
Lecture Notes: EEEE6490345 RF and Microwave Electronics - Noise In Two-Port ...
Lecture Notes: EEEE6490345 RF and Microwave Electronics - Noise In Two-Port ...
EXPONENTIAL HORN - DESIGN,COMPUTER MODELING, CONSTRUCTION, MEASUREMENTS AND D...
EXPONENTIAL HORN - DESIGN,COMPUTER MODELING, CONSTRUCTION, MEASUREMENTS AND D...
Recently uploaded
Sharlene Leurig - Enabling Onsite Water Use with Net Zero Water
Sharlene Leurig - Enabling Onsite Water Use with Net Zero WaterTexas Alliance of Groundwater Districts
Presented at June 6-7 Texas Alliance of Groundwater Districts Business MeetingESA/ACT Science Coffee: Diego Blas - Gravitational wave detection with orbita...
ESA/ACT Science Coffee: Diego Blas - Gravitational wave detection with orbita...Advanced-Concepts-Team
Presentation in the Science Coffee of the Advanced Concepts Team of the European Space Agency on the 07.06.2024.
Speaker: Diego Blas (IFAE/ICREA)
Title: Gravitational wave detection with orbital motion of Moon and artificial
Abstract:
In this talk I will describe some recent ideas to find gravitational waves from supermassive black holes or of primordial origin by studying their secular effect on the orbital motion of the Moon or satellites that are laser ranged.Direct Seeded Rice - Climate Smart Agriculture
Direct Seeded Rice - Climate Smart AgricultureInternational Food Policy Research Institute- South Asia Office
PPT on Direct Seeded Rice presented at the three-day 'Training and Validation Workshop on Modules of Climate Smart Agriculture (CSA) Technologies in South Asia' workshop on April 22, 2024.
Bob Reedy - Nitrate in Texas Groundwater.pdf
Presented at June 6-7 Texas Alliance of Groundwater Districts Business Meeting
waterlessdyeingtechnolgyusing carbon dioxide chemicalspdf
The technology uses reclaimed CO₂ as the dyeing medium in a closed loop process. When pressurized, CO₂ becomes supercritical (SC-CO₂). In this state CO₂ has a very high solvent power, allowing the dye to dissolve easily.
SAR of Medicinal Chemistry 1st by dk.pdf
In this presentation include the prototype drug SAR on thus or with their examples .
Syllabus of Second Year B. Pharmacy
2019 PATTERN.
8.Isolation of pure cultures and preservation of cultures.pdf
Isolation of pure culture, its various method.
Immersive Learning That Works: Research Grounding and Paths Forward
We will metaverse into the essence of immersive learning, into its three dimensions and conceptual models. This approach encompasses elements from teaching methodologies to social involvement, through organizational concerns and technologies. Challenging the perception of learning as knowledge transfer, we introduce a 'Uses, Practices & Strategies' model operationalized by the 'Immersive Learning Brain' and ‘Immersion Cube’ frameworks. This approach offers a comprehensive guide through the intricacies of immersive educational experiences and spotlighting research frontiers, along the immersion dimensions of system, narrative, and agency. Our discourse extends to stakeholders beyond the academic sphere, addressing the interests of technologists, instructional designers, and policymakers. We span various contexts, from formal education to organizational transformation to the new horizon of an AI-pervasive society. This keynote aims to unite the iLRN community in a collaborative journey towards a future where immersive learning research and practice coalesce, paving the way for innovative educational research and practice landscapes.
Applied Science: Thermodynamics, Laws & Methodology.pdf
When I was asked to give a companion lecture in support of ‘The Philosophy of Science’ (https://shorturl.at/4pUXz) I decided not to walk through the detail of the many methodologies in order of use. Instead, I chose to employ a long standing, and ongoing, scientific development as an exemplar. And so, I chose the ever evolving story of Thermodynamics as a scientific investigation at its best.
Conducted over a period of >200 years, Thermodynamics R&D, and application, benefitted from the highest levels of professionalism, collaboration, and technical thoroughness. New layers of application, methodology, and practice were made possible by the progressive advance of technology. In turn, this has seen measurement and modelling accuracy continually improved at a micro and macro level.
Perhaps most importantly, Thermodynamics rapidly became a primary tool in the advance of applied science/engineering/technology, spanning micro-tech, to aerospace and cosmology. I can think of no better a story to illustrate the breadth of scientific methodologies and applications at their best.
快速办理(UAM毕业证书)马德里自治大学毕业证学位证一模一样
学校原件一模一样【微信：741003700 】《(UAM毕业证书)马德里自治大学毕业证学位证》【微信：741003700 】学位证，留信认证（真实可查，永久存档）原件一模一样纸张工艺/offer、雅思、外壳等材料/诚信可靠,可直接看成品样本，帮您解决无法毕业带来的各种难题！外壳，原版制作，诚信可靠，可直接看成品样本。行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备。十五年致力于帮助留学生解决难题，包您满意。
本公司拥有海外各大学样板无数，能完美还原。
1:1完美还原海外各大学毕业材料上的工艺：水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠。文字图案浮雕、激光镭射、紫外荧光、温感、复印防伪等防伪工艺。材料咨询办理、认证咨询办理请加学历顾问Q/微741003700
【主营项目】
一.毕业证【q微741003700】成绩单、使馆认证、教育部认证、雅思托福成绩单、学生卡等！
二.真实使馆公证(即留学回国人员证明,不成功不收费)
三.真实教育部学历学位认证（教育部存档！教育部留服网站永久可查）
四.办理各国各大学文凭(一对一专业服务,可全程监控跟踪进度)
如果您处于以下几种情况：
◇在校期间，因各种原因未能顺利毕业……拿不到官方毕业证【q/微741003700】
◇面对父母的压力，希望尽快拿到；
◇不清楚认证流程以及材料该如何准备；
◇回国时间很长，忘记办理；
◇回国马上就要找工作，办给用人单位看；
◇企事业单位必须要求办理的
◇需要报考公务员、购买免税车、落转户口
◇申请留学生创业基金
留信网认证的作用:
1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
The binding of cosmological structures by massless topological defects
Assuming spherical symmetry and weak field, it is shown that if one solves the Poisson equation or the Einstein field
equations sourced by a topological defect, i.e. a singularity of a very specific form, the result is a localized gravitational
field capable of driving flat rotation (i.e. Keplerian circular orbits at a constant speed for all radii) of test masses on a thin
spherical shell without any underlying mass. Moreover, a large-scale structure which exploits this solution by assembling
concentrically a number of such topological defects can establish a flat stellar or galactic rotation curve, and can also deflect
light in the same manner as an equipotential (isothermal) sphere. Thus, the need for dark matter or modified gravity theory is
mitigated, at least in part.
11.1 Role of physical biological in deterioration of grains.pdf
Storagedeteriorationisanyformoflossinquantityandqualityofbio-materials.
Themajorcausesofdeteriorationinstorage
•Physical
•Biological
•Mechanical
•Chemical
Storageonlypreservesquality.Itneverimprovesquality.
Itisadvisabletostartstoragewithqualityfoodproduct.Productwithinitialpoorqualityquicklydepreciates
Compexometric titration/Chelatorphy titration/chelating titration
Classification
Metal ion ion indicators
Masking and demasking reagents
Estimation of Magnisium sulphate
Calcium gluconate
Complexometric Titration/ chelatometry titration/chelating titration, introduction, Types-
1.Direct Titration
2.Back Titration
3.Replacement Titration
4.Indirect Titration
Masking agent, Demasking agents
formation of complex
comparition between masking and demasking agents,
Indicators/Metal ion indicators/ Metallochromic indicators/pM indicators,
Visual Technique,PM indicators (metallochromic), Indicators of pH, Redox Indicators
Instrumental Techniques-Photometry
Potentiometry
Miscellaneous methods.
Complex titration with EDTA.
Micronuclei test.M.sc.zoology.fisheries.
Current Ms word generated power point presentation covers major details about the micronuclei test. It's significance and assays to conduct it. It is used to detect the micronuclei formation inside the cells of nearly every multicellular organism. It's formation takes place during chromosomal sepration at metaphase.
(June 12, 2024) Webinar: Development of PET theranostics targeting the molecu...
(June 12, 2024) Webinar: Development of PET theranostics targeting the molecu...Scintica Instrumentation
Targeting Hsp90 and its pathogen Orthologs with Tethered Inhibitors as a Diagnostic and Therapeutic Strategy for cancer and infectious diseases with Dr. Timothy Haystead.Recently uploaded (20)
Sharlene Leurig - Enabling Onsite Water Use with Net Zero Water
Sharlene Leurig - Enabling Onsite Water Use with Net Zero Water
ESA/ACT Science Coffee: Diego Blas - Gravitational wave detection with orbita...
ESA/ACT Science Coffee: Diego Blas - Gravitational wave detection with orbita...
Basics of crystallography, crystal systems, classes and different forms
Basics of crystallography, crystal systems, classes and different forms
GBSN - Biochemistry (Unit 6) Chemistry of Proteins
GBSN - Biochemistry (Unit 6) Chemistry of Proteins
waterlessdyeingtechnolgyusing carbon dioxide chemicalspdf
waterlessdyeingtechnolgyusing carbon dioxide chemicalspdf
8.Isolation of pure cultures and preservation of cultures.pdf
8.Isolation of pure cultures and preservation of cultures.pdf
Immersive Learning That Works: Research Grounding and Paths Forward
Immersive Learning That Works: Research Grounding and Paths Forward
Applied Science: Thermodynamics, Laws & Methodology.pdf
Applied Science: Thermodynamics, Laws & Methodology.pdf
The binding of cosmological structures by massless topological defects
The binding of cosmological structures by massless topological defects
11.1 Role of physical biological in deterioration of grains.pdf
11.1 Role of physical biological in deterioration of grains.pdf
Compexometric titration/Chelatorphy titration/chelating titration
Compexometric titration/Chelatorphy titration/chelating titration
(June 12, 2024) Webinar: Development of PET theranostics targeting the molecu...
(June 12, 2024) Webinar: Development of PET theranostics targeting the molecu...
Intensity and Power - Talking
- 2. CONSIDER THIS: You work at Science World, and an IMAX movie is about to start. You have to let the audience know about the rules of watching the movie in the globular theatre, which is 5 storeys (16.5m) high and has a diameter of 27m. The movie, producing a sound that is 80 dB loud, how much power would you require in order to talk over the movie?
- 3. CONSIDER THIS: Understand that the speakers are arranged in a way that the entire audience hears 80 dB, but the maximum distance to the audience is 13.5m (due to the dome shape of the theatre).
- 4. HINT 1: Use the relationship between dB and I to figure out the sound intensity 0 dB = 10-12 W/m2 *remember I = I0 • 10β/10
- 5. HINT 2: Assuming that the power is being radiated uniformly in all directions (isotropically), use the relationship between I and P I = P/4πr2
- 6. SOLN: HINT 1: Use the relationship between dB and I to figure out the sound intensity
- 7. SOLN: HINT 1: Use the relationship between dB and I to figure out the sound intensity 80 db _____ 10 = 8
- 8. SOLN: HINT 1: Use the relationship between dB and I to figure out the sound intensity 80 db _____ 10 = 8 108
- 9. SOLN: HINT 1: Use the relationship between dB and I to figure out the sound intensity 80 db _____ 10 = 8 108 108 • 10-12
- 10. SOLN: HINT 1: Use the relationship between dB and I to figure out the sound intensity 80 db _____ 10 = 8 108 108 • 10-12 = 10-4
- 11. SOLN: HINT 2: Assuming that the power is being radiated uniformly in all directions (isotropically), use the relationship between I and P
- 12. SOLN: HINT 2: Assuming that the power is being radiated uniformly in all directions (isotropically), use the relationship between I and P I = P/4πr2
- 13. SOLN: HINT 2: Assuming that the power is being radiated uniformly in all directions (isotropically), use the relationship between I and P I = P/4πr2 Rearrange the formula!
- 14. SOLN: HINT 2: Assuming that the power is being radiated uniformly in all directions (isotropically), use the relationship between I and P I = P/4πr2 I = P/4πr2 P = I • 4πr2
- 15. SOLN: HINT 2: Assuming that the power is being radiated uniformly in all directions (isotropically), use the relationship between I and P I = P/4πr2 I = P/4πr2 P = I • 4πr2 P = 10-4 • 4π(13.5)2 r = d/2 = 27/2 = 13.5 P = 10-4 • 2290.22 P = 0.229 W
- 16. THE END