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Sound travels as a pressure wave through gases, liquids, and solids at approximately 343 meters per second. Humans can typically hear sounds between 12-20,000 Hz, though some animals like dogs can hear higher frequencies. The scientific study of how sound waves propagate, absorb, and reflect is called acoustics. Noise refers to unwanted sound that obscures wanted signals.
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Sound is produced by vibrations that propagate through a medium as waves. It travels faster in solids than liquids and gases. The human ear detects sound waves that are converted into electrical signals in the brain. Sound waves have properties like amplitude, frequency, pitch and loudness. Ultrasound and infrasound are inaudible to humans but used by some animals for navigation and communication. Sonar uses ultrasound pulses and echoes to determine distances underwater.
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Sound is a mechanical wave composed of frequencies that is transmitted through various mediums. William Derham produced one of the earliest estimates of the speed of sound by measuring the interval between a gunshot and the arrival of the sound. The speed of sound in dry air at 20°C is 343 meters per second. Medical sonography uses ultrasound to visualize internal organs and structures by producing sound waves, receiving echoes, and interpreting the echoes. An inventor created an ultrasonic device called a Dazer that emits a frequency inaudible to humans but uncomfortable to animals to deter aggressive behavior.
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[1] Sound is a mechanical wave composed of frequencies that transmits pressure oscillations through solids, liquids, and gases.
[2] William Derham produced one of the earliest accurate estimates of the speed of sound by measuring the interval between a gunshot and the arrival of noise from miles away.
[3] Medical sonography uses ultrasound to visualize internal organs and structures by producing sound waves, receiving echoes, and interpreting the echoes.
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- Common uses of directional speakers including in museums, retail stores, and hospitals to provide localized sound without adding noise elsewhere.
- Inventors who helped develop the technology including Woody Norris and Dr. Joseph Pompei.
- Issues around noise pollution from sources like transportation, festivals, and how it can impact human and animal health. Standards and solutions to reduce noise pollution are discussed.
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You can learn more about the Telecentre Multimedia Academy project in:
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2. Sound travels fastest in solids, slower in liquids, and slowest in gases, with speed determined by the density and proximity of particles.
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Sound is a vibration that travels in waves through a medium like air or water. It is caused by vibrating objects and radiates outward in all directions. When these vibrations reach the ear, they are interpreted by the brain as sound. Sound waves are longitudinal waves that cause alternating compressions and rarefactions in the medium as they propagate. For sound to travel, it requires a material medium like air, water or other solids and liquids. As sound waves travel, they can be reflected, refracted or attenuated by the medium. The human ear collects sound pressure waves which are amplified through the middle and inner ear where fluid-filled chambers containing hair cells detect vibrations and transmit nerve signals to the brain.
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Sound travels as waves and can be reflected. Reflection is when a wave changes direction at an interface between two mediums and returns to its original medium. Sound waves reflect in the same way as light waves, following the laws of reflection where the angle of incidence equals the angle of reflection. Devices like loudspeakers, megaphones, and stethoscopes use the reflection of sound waves to direct or transmit sound in a desired way. Ultrasound uses high frequency sound waves and reflection to detect objects underwater or inside the human body. Sonar also uses reflection of sound waves to locate objects underwater by emitting pulses and measuring the echo returns.
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Sound travels as waves and can be reflected. Reflection is when a wave changes direction at an interface between two mediums and returns to its original medium. Sound waves reflect in the same way as light waves, following the laws of reflection where the angle of incidence equals the angle of reflection. Devices like loudspeakers, megaphones, and stethoscopes use the reflection of sound waves to direct or transmit sound in a desired way. Ultrasound uses high frequency sound waves and reflection to detect objects underwater or inside the human body. Sonar also uses reflection of sound waves to locate objects underwater by emitting pulses and measuring the echo returns.
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1) Sound is a form of energy that travels in waves and more quickly through solids than liquids or gases. There are two main types of sound - musical sounds produced by regular vibrations and noise sounds from irregular vibrations.
2) The ear takes in sound waves and converts them to signals sent to the brain. Sound waves move through three parts of the ear - the outer, middle, and inner ear.
3) Pitch depends on the frequency of a sound wave, with a higher pitch associated with a higher frequency and shorter wavelength. Musical instruments can be played at different pitches by changing the lengths or thicknesses of their parts.
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Sound is produced by vibration and travels as compressions and rarefactions through a medium. It has characteristics like wavelength, amplitude, frequency, and speed. Sound reflects off surfaces, causing echoes, and reverberates through overlapping reflections. Humans can hear sounds from 20 Hz to 20 kHz, while ultrasound above this range has medical and industrial uses.
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Sound is a mechanical wave composed of frequencies that is transmitted through various mediums. William Derham produced one of the earliest estimates of the speed of sound by measuring the interval between a gunshot and the arrival of the sound. The speed of sound in dry air at 20°C is 343 meters per second. Medical sonography uses ultrasound to visualize internal organs and structures by producing sound waves, receiving echoes, and interpreting the echoes. An inventor created an ultrasonic device called a Dazer that emits a frequency inaudible to humans but uncomfortable to animals to deter aggressive behavior.
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[1] Sound is a mechanical wave composed of frequencies that transmits pressure oscillations through solids, liquids, and gases.
[2] William Derham produced one of the earliest accurate estimates of the speed of sound by measuring the interval between a gunshot and the arrival of noise from miles away.
[3] Medical sonography uses ultrasound to visualize internal organs and structures by producing sound waves, receiving echoes, and interpreting the echoes.
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Learn how sound, vibrations, and waves all relate to each other by using simple physics equations. Included GIFs to understand the physical representation of each concept.
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This document discusses directional sound speakers and noise pollution. It provides information on:
- How directional speakers work using ultrasound to create tightly focused sound beams. This allows sound to be aimed at specific locations.
- Common uses of directional speakers including in museums, retail stores, and hospitals to provide localized sound without adding noise elsewhere.
- Inventors who helped develop the technology including Woody Norris and Dr. Joseph Pompei.
- Issues around noise pollution from sources like transportation, festivals, and how it can impact human and animal health. Standards and solutions to reduce noise pollution are discussed.
Frequency
Frequency is defined as the number of occurrences of a repeating event per unit time, with the standard SI unit being hertz (Hz). One hertz is equal to one cycle per second. Period is the reciprocal of frequency and is measured in units of time. Frequency and wavelength are closely related, with higher frequencies having shorter wavelengths and lower frequencies having longer wavelengths. There are several methods for measuring frequency, including counting cycles, using a stroboscope, or a frequency counter for higher frequencies. Sound propagates as pressure and displacement waves, with the audible frequency range for humans being 20Hz to 20,000Hz. Electromagnetic waves are classified into different frequency bands that have characteristic properties and applications.
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1. Sound is a kind of energy that is made when something vibrates. Musical instruments make sound by causing air or other materials like strings or membranes to vibrate.
2. Sounds can be described based on their loudness, which is how loud or soft they are, and their pitch, which is how high or low they are. Different instruments make different pitches and volumes of sound through vibrating.
3. All sounds are produced by vibrations - when the vibrations stop, so does the sound. Musical instruments cause vibrations in air, strings, reeds or other materials to produce sounds.
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Though, noise is a controllable entity of the environment, on several occasions it is found to be uncontrollable and create severe impacts on life and induce unpleasant circumstances.
Noise pollution is a public nuisance to the environment.
Fundamentals of sound module (basic level)
The "Fundamental of sound" module is focused to adults learners interested in exploring the possibilities of managing digital sound.
This module is part of a set of materials designed and developed in the project Telecentre Multimedia Academy (Lifelong learning - Grundtvig (2012-2014)) project.
The Telecentre Multimedia Academy is a project where Fundación Esplai worked with a consortium of 8 partners from Croatia, Latvia, Lithuania, Romania, Serbia and Hungary, whose coordinator is Telecentre Europe.
You can learn more about the Telecentre Multimedia Academy project in:
http://fundacionesplai.org/e-inclusion-internacional/tma/
Animal Hearing Range
Humans can hear sounds between 20Hz and 20,000Hz as sound waves travel through the air and cause the eardrum and small bones in the ear to vibrate, ultimately causing liquid in the cochlea to vibrate. Dolphins produce clicks from nasal sacs that reflect off objects and are received through the lower jaw, traveling through a fat-filled channel into the ear, and dolphins can focus sound waves using a fatty lens, hearing ultrasound up to 150 kHz.
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Lecture 07 sound waves. speed of sound. intensity.
Lecture 07 sound waves. speed of sound. intensity.
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PPT ON SOUND BY MHFK
Sound is produced by vibrations that propagate through a medium as waves. It travels faster in solids than liquids and gases. The human ear detects sound waves that are converted into electrical signals in the brain. Sound waves have properties like amplitude, frequency, pitch and loudness. Ultrasound and infrasound are inaudible to humans but used by some animals for navigation and communication. Sonar uses ultrasound pulses and their echoes to determine distances underwater.
SOUND.pptx
Presentation on SOUND by an audiologist Sa'adu Adamu, department of Audiology National Ear Care center Kaduna, Nigeria.
Difference between ultrasonic and infrasonic sound.pdf
This document compares and contrasts infrasonic and ultrasonic sound. It defines infrasonic sound as having a frequency below 20 Hz, which is inaudible to humans but can be detected by elephants and whales. Ultrasonic sound is defined as having a frequency above 20,000 Hz, which is also inaudible to humans but can be detected by dogs, bats and mice. It then provides examples of applications of ultrasound like tracking fetal growth and using it for medical imaging.
Sound
Sound is a form of energy that is produced by vibrating sources placed in a medium like solids, liquids, or gases. It travels as a longitudinal wave and can be transmitted through any medium whose particles can vibrate, with solids transmitting sound the fastest. The speed of sound is affected by temperature and humidity but not pressure. It can be measured directly by having two observers time the delay between a sound and its perception. The human ear can detect sounds between 20 Hz and 20 kHz with anything higher or lower being considered ultrasound or infrasound, respectively. Ultrasound has medical imaging applications while echoes and reverberations are used for detection purposes by various organisms and technologies. Pitch and loudness describe frequency and amplitude of sound
Sound
Sound
What is Sound?
Frequency and pitch of sound
Speed of sound
What is sound intensity?
What is resonance?
Ultrasound and infrasonic
Presentation1
Sound is produced by vibrations of objects that create waves which push air molecules and transmit through the air. The frequency, or amount of vibrations per second, determines if a sound is high or low pitched. Humans can hear sounds between 20-20,000 Hz, while sounds outside this range are infrasonic or ultrasonic. Volume is measured in decibels, where each 10 dB increase means a sound is perceived as twice as loud. Different sounds have unique frequency profiles that allow for distinguishing characteristics.
SOUND AND HEARING
Sound is a form of energy produced by vibration that travels in longitudinal waves faster through solids than liquids or gases. The human ear has external, middle, and inner portions that work together to detect sound. Sound causes the eardrum and tiny bones in the middle ear to vibrate, transmitting the vibrations to the cochlea of the inner ear which transforms them into nerve impulses sent to the brain where they are interpreted. The brain also receives information from the semicircular canals of the inner ear on balance and head position.
PROPERTIES OF SOUNDPROPERTIES OF SOUNDPROPERTIES OF SOUNDPROPERTIES OF SOUNDP...
Sound is a longitudinal wave that travels through a medium and is caused by vibrations. The speed of sound depends on the medium, being fastest in solids and liquids and slower in gases. Loudness depends on intensity, which is determined by amplitude and distance from the source. Pitch depends on frequency, with higher frequencies being higher pitched. Humans can hear sounds between 20-20,000 Hz. Musical instruments produce sound through vibrating strings, air columns or membranes using standing waves and resonance. The ear senses sound waves, amplifies them, and transmits signals to the brain through three regions and the basilar membrane. Reflected sound waves can be used to determine distances as in sonar and to create images as in
Basic theory of sound
Sound is a vibration that travels in air or other materials as a wave. The speed and wavelength of sound depends on factors like the medium and frequency. Sound is detected when vibrations reach the ear drum and are interpreted by the brain. Characteristics of sound include frequency, wavelength, loudness, quality, and amplitude. Sound can be measured in units like decibels and analyzed to understand acoustics, prevent hearing damage, and improve audio experiences.
Multimedia Sound and Audio.pptx
Audio refers to the range of frequencies detectable by the human ear, from 20Hz to 20kHz. Audio work involves the production, recording, manipulation and reproduction of sound waves, which requires an understanding of sound waves and sound equipment. Common areas of audio work include studio and live sound engineering, music production, DJing, radio, film sound, and more.
A project on sound by nikund
Sound is a form of energy that is transmitted through vibration. It can travel through gases, liquids, and solids as longitudinal waves called compression waves. In humans, sound is detected by the ear, which contains the outer, middle, and inner ear that work together to detect changes in pressure and convert them into nerve signals that the brain interprets as sound. The document then discusses various properties of sound waves including frequency, amplitude, intensity, speed, and direction as well as characteristics like pitch, duration, loudness, and timbre. It also covers related topics such as echo, reverberation, sonar, ultrasound, infrasound, and sonic booms.
Sound.ppt
Sound is a mechanical wave that travels through a medium such as air, water or steel. It is caused by vibrations which create alternating high and low pressure regions. The pitch we hear is determined by the frequency of vibrations, with higher frequencies corresponding to higher pitches. Sound can travel through solids, liquids and gases, with speed dependent on the properties of the medium. Intensity or loudness is measured in decibels and perceived as changes in air pressure.
ACOUSTICS.pdf
The document discusses acoustics and sound. It begins by defining acoustics as the branch of physics dealing with sound generation, propagation, and analysis. It then discusses key acoustics terminology like amplitude, frequency, wavelength, absorption, and reverberation. The document explains how sound intensity decreases with distance according to the inverse square law. It also discusses how different materials can absorb or reflect sound to varying degrees, and how the reverberation time of a space is measured. In summary, the document provides an introduction to acoustics concepts including sound properties, behavior in enclosed spaces, and factors that influence sound absorption.
Sound and hearing by mairasadiq
This document provides information about sound and hearing. It defines sound as vibrations that have frequencies between 20-20,000 Hertz that can be detected by the human ear. It describes hearing as the ability to perceive sound through detecting vibrations in the air, liquid or solid medium through an organ such as the ear. It explains that sound travels through variations in pressure that push surrounding material like water or air, and discusses key characteristics of sound waves such as pitch, frequency, amplitude and speed of sound. The document also describes how we are able to hear sound, with our ears converting vibrations into nerve signals sent to the brain for interpretation.
Sc Ience
1) Sound is a physical phenomenon that stimulates the sense of hearing in humans through vibrations between 15-20,000 Hz reaching the inner ear. The speed of sound varies but travels around 1,190 km/h through dry air.
2) The frequency and amplitude of a sound wave determine its pitch and loudness. Frequency is measured in Hertz and refers to the number of vibrations or cycles per second. Amplitude is the degree of motion of air molecules and corresponds to changes in air pressure.
3) There are two main types of sound waves: transverse waves, where the vibration is perpendicular to the direction of travel, and longitudinal waves, where the vibration is parallel to the direction of travel.
Sound - Acoustics & Psychoacoustics
Sound is defined as vibrations that travel through air or another medium and can be heard. It includes speech, music, and noise. Noise lacks a regular pattern and is considered undesirable sound. Sound is measured in decibels and can be recorded using microphones. The science of acoustics deals with the production, transmission, and effects of sound. It is divided into sound, which travels through fluids, and vibration, which is felt through denser materials. Psychoacoustics studies the relationship between the physical properties of sound and the sensations and perceptions they produce in human hearing.
SOUND.pptx
Sound is a form of energy that comes from vibrations, creating sound waves that move through a medium like air or water. Sound propagates through a medium and requires a medium to travel; it cannot propagate through a vacuum. The properties of sound waves include amplitude, which is the maximum displacement and relates to loudness; frequency, which is the number of oscillations per second and relates to pitch; and time period, which is the time for one full oscillation. Humans produce sound through vibrations of the vocal cords in the larynx that are tightened or loosened by muscles.
Sounds
Sound waves are mechanical compression waves that cause alternating high and low pressure regions in air or other materials. The speed of sound depends on the density and compressibility of the medium and follows the formula velocity=sqrt(elasticity/inertia). Humans can hear sounds between 20-20,000 Hz but some animals can hear infra or ultrasound beyond this range. Sound is measured on the decibel scale which is logarithmic to account for the wide range of sound amplitudes.
Sound
This document defines sound and discusses several key aspects of sound waves:
- Sound is a mechanical wave that is created by vibrating objects and propagates through a medium. Whether a human is present to hear it or not, sound exists as a physical disturbance in the medium.
- Sound waves are longitudinal mechanical waves that can be characterized by their frequency (pitch) and intensity (loudness). Higher frequencies are perceived as higher pitches, while greater intensities are perceived as louder volumes.
- The human range of hearing is typically 20 Hz to 20 kHz. Ultrasound and infrasound refer to frequencies above and below this range. Intensity is measured in decibels, with each doubling of intensity corresponding
Acoustics
This document discusses acoustics and noise control. It begins by defining acoustics and describing the basics of sound, including properties like amplitude, frequency, wavelength. It then explains sound propagation principles such as reflection, refraction, diffraction and absorption. Different materials and their effects on sound are described. Noise control techniques like site planning, architectural design and sound barriers are discussed. Specific examples of architectural designs that enhance sound are provided.
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我们所定的价格是非常合理的，而且我们现在做得单子大多数都是代理和回头客户介绍的所以一般现在有新的单子 我给客户的都是第一手的代理价格，因为我想坦诚对待大家 不想跟大家在价格方面浪费时间
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Presentation2
- 1. Sound
- 4. How does sound travel
- 6. Thank you