The document discusses key concepts related to acoustics and the behavior of sound in enclosed spaces. It defines terms like wavelength, period, frequency, velocity of sound, and amplitude. It then explains how sound waves interact with the materials and geometry of an enclosure through reflection, absorption, refraction, diffusion, diffraction, and transmission. Reducing the intensity of sound and absorbing sound through surfaces and audiences can control how sounds behave in an enclosed area. Reflections from right-angled corners and dispersion of enclosure sides also impact sound behavior.
The distortion of sound we hear is due to "coloration" of the sound caused by reverberation - an invisible physical phenomenon. This presentation brings out the basics of reverberation.
The distortion of sound we hear is due to "coloration" of the sound caused by reverberation - an invisible physical phenomenon. This presentation brings out the basics of reverberation.
The behavior of sound in enclosed spaces is an important matter particularly in homes. It explains how the sound we listen gets colored causing distortion.
Physics 3 notes: light and sound mechanics including eyes, ears, longitudina...Robin Seamon
Notes on Light and Sound waves including the mechanics of how we see and hear to the different pitches, frequencies, and sound quality explaining longitudinal & electromagnetic waves as they relate; optical illusions & color theory included as well as video links
P1.5 Presentation.
Useful for revision for exams as it contains accurate information.
It includes:
- What are Waves
- Waves Definitions
- Energy Transfer
- Wave Speed
- Frequency & Time Period
- Light & Sound
- Reflection
- Refraction
- Diffraction
- Measuring Waves
- Oscilloscopes
- Ray Diagrams
- Using Light
- Red Shift
- The Big Bang Theory
This final presentation completes the whole of Physics (P1). This'll hopefully become part of a bigger collection of other science topics, soon to be uploaded.
Thank You. To all of you out there who may find my presentation helpful in any way, shape or form.I pleased to now be able to say the P1 Collection is now complete. Soon I'll be uploading other presentation on Physics, such as; P2 & P3 Hope you find these presentations useful and helpful for exams or just general revision. More presentation coming soon on this channel, JaskiratK.
See You Soon,
Jaskirat
Created By: JaskiratK
Uploaded By: JaskiratK
Information By: BBC Bitesize
Pictures/Images/Diagram: Google, BBC Bitesize
Slideshare: http://www.slideshare.net/JaskiratK
Prezi: https://prezi.com/user/mrnfvgaamzxe/
this chapter is nice for us as it is important in my life and please like it or it will be very usefull of you and pls like share comment and plese follow and dowload .
An auditorium is designed based on the function itself. For example: Dewan Agong Tuanku Canselor UiTM, that is a multi-purpose auditoria which indicates both functions; speech and also music purposes. It depends on the event that will be held in the auditorium. The design of the auditorium must comprises of both functions in order to have a good room acoustic. In addition, it must be work out for changes.
Notes for Architecture 4th Year subject Services. The topic is about Acoustic, how does it work for different places, how we can treat spaces according to acoustic and for better acoustic
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Hierarchical Digital Twin of a Naval Power SystemKerry Sado
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
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CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
3. This the distance between two pressure peaks or
valleys, measured in metres (m) and represented
with the Greek alphabet ‘l’ (lambda). Period – This
is the time taken for on complete oscillation. This is
measured in seconds(s) and represented with the
letter ‘T’. Frequency – This is the number of
oscillations per second. This is represented with ‘f’
and measured in Hertz (Hz).
4. Velocity of sound – This is the rate at which a
sound wave travels from a source through a
medium to the receiver. The unit is m/s.
Amplitude – This is the distance between a
crest (the highest point) and a valley (the lowest
point) Pitch – it is the highness or lowness of a
tone determined by the rapidity of the
oscillations producing it.
5. An enclosed space is a room or area bounded on
every of its sides. The materials for enclosure may
be classified into two: Those that allow sound rays
to pass through and Those that do not allow sound
rays to pass through. On encountering barriers
posed by the enclosure, sound waves are likely to
behave in the following ways: ◦ Reflection ◦
Absorption ◦ Refraction ◦ Diffusion ◦ Diffraction ◦
Transmission
6. This occurs when the wavelength of a sound wave is
smaller than the surface of an obstacle. In the case of
an enclosed space, the sound waves hit every side of
the enclosure continuously until the sound energy
reduces to zero. The amount of waves reflected
depends on the smoothness, size, and softness of
the materials of enclosure. The angle of incidence of
sound rays is equal to that of the reflected rays only if
the surface of the reflector is flat. But when it is
curved, the angles are different.
7. When sound waves hit the surface of an
obstacle, some of its energy is reflected while
some are lost through its transfer to the
molecules of the barrier. The lost sound energy
is said to have been absorbed by the barrier.
The thickness and nature of the material as
regards its softness and hardness influences the
amount of sound energy absorbed.
8. This is the bending of sound when it travels
from one medium into another medium. The
difference in the composition of the two
different media bends the sound i.e. the
angle of incidence changes into an angle of
refraction as it travels into the new medium.
9. This is the scattering of waves from a
surface. It occurs as a result of the texture
and hardness of the obstacle is comparable
to the wavelength of the sound. The
direction of the incident ray changes when it
strikes the surface of the obstacle.
Satisfaction is achieved when sound is
heard in all direction at equal level.
10. When the wavelength of a sound wave is
smaller or equal to the size of the obstacle,
the sound rays tend to bend round the edge
of the obstacle thereby turning the edge to a
sound source.
11. In this phenomenon, sound wave is carried by
molecules of the obstacle through vibration
and re-emitted at the other side irrespective of
the medium. It can be structure borne, air
borne or impact sound
12. Reduction in its intensity of sound – This can results due to
the distance between its source and the receiver.
Absorption of direct sound by the audience – The listeners
of the sound absorb some of the sound in the process of
hearing. Absorption of direct and reflected sound by
surfaces – The walls, ceiling and floor of the enclosure
absorbs and reflect sound waves thereby controlling the
way the sounds behave. Reflection of sounds from right-
angled corners - Sound incident to a right-angled corner of
room will be reflected back towards source if surfaces are
acoustically reflective.
13. This can in turn produce echoes especially in large spaces.
Dispersion of the sides of an enclosure - Reflections can be
controlled by making one surface dispersive i.e. not at right
angle to each. This would have affected the reflection of the
sound thereby affecting its behaviour.