NCERT Question 15 – Chapter 12 Class 9 – Sound (Deleted) Reverberation happens when time period between Original and Reflected Sound is less than 0.1 seconds. Reverberation can be reduced by using sound absorbing materials. For example, Heavy curtains are used on walls. Carpets are put to absorb sound.
What is reverberation Class 9 answer?
The persistence of sound in big hall due to repeated reflections from walls,ceiling,floor of the hall is called reverberation. In a big hall excessive reverberation is highly undesirable.
What is called reverberation?
Reverberation (also known as reverb), in acoustics, is a persistence of sound, or echo after a sound is produced.Reverberation occurs naturally when a person sings, talks, or plays an instrument acoustically in a hall or performance space with sound-reflective surfaces.
What is echo and reverberation Class 9?
An echo is a single reflection of a soundwave off a distance surface. Reverberation is the reflection of sound waves created by the superposition of such echoes.A reverberation can occur when a sound wave is reflected off a nearby surface.
What is reverberation give example?
The definition of a reverberation is a reflection of light or sound waves, or a wide reaching impact of an action. An example of a reverberation is the sound bouncing around in a large speaker. An example of a reverberation is the impact of a no trespassing law at a shopping center on students at a nearby high school.
What is the use of reverberation?
Reverberation effects are frequently used in studios to enhance the depth of sounds. Reverberation modifies the perceived spectral structure of a sound but does not change the pitch.
What is reverberation in physics class 10?
The repeated reflection that results in the persistence of sound in a large hall is called reverberation.
What is Sonar class 9th?
Sonar stands for Sound Navigation And Ranging. It is a device which is used to find distance, direction and speed of underwater objects like, water hills, valleys, icebergs, submarines, sunken ships etc.
What is reverberation and noise?
Reverberation noise is produced when a sound source stops within an enclosed space. Sound waves continue to reflect off the ceiling, walls and floor surfaces until they eventually die out. These reflected sound waves are known as reverberation.
What is called echo?
echo. [ ?k?? ] A repeated sound that is caused by the reflection of sound waves from a surface. The sound is heard more than once because of the time difference between the initial production of the sound waves and their return from the reflecting surface. A wave that carries a signal and is reflected.
What is meant by an echo Byjus?
We know that vibrations created by the body or object produce sound. An echo is formed when the reflection of a soundwave off a distance surface takes place.
What is reflection of sound?
Reflections of sound
Bouncing back of sound waves from the surface is called reflection of sound or we can say that when sound travels in a given medium it strikes the surface of another medium so that it returns in some other direction, this phenomenon is called reflection of sound.
What is reverberation Byjus?
The repeated multiple reflections of sound in any big enclosed space are known as reverberation. The reverberation can be reduced by covering the ceiling and walls of the enclosed space with sound-absorbing materials, such as fibreboard, loose woollens, etc.
What is advantage of reverberation?
When a sound is produced in a big hall, its wave reflects from the walls and travel back and forth. Due to this, energy does not reduce and the sound persists. Small amount of reverberation for lesser time helps in adding volume to the programmers.
What is reverberation Class 9 Brainly?
Reverberation is an effect of multiple reflections of sound waves.Reverberations help the people at different locations to receive sound at uniform intensity.
How do you stop reverberation?
Reverberation can be reduced by using some kind of material on the walls or ceiling of the room that absorbs the sound waves rather than reflecting it. Plastics, fibreboards, or curtains are some of the substances that are used to reduce the reverberation of sound.
What is study of sound called?
acoustics, the science concerned with the production, control, transmission, reception, and effects of sound.Beginning with its origins in the study of mechanical vibrations and the radiation of these vibrations through mechanical waves, acoustics has had important applications in almost every area of life.
What is sound note?
Explanation: A sound of single frequency is called a tone. A sound that is produced when several frequencies are mixed is called a note. For example a musical note has tones of various frequencies (sounds of different pitch) and amplitudes (loudness).
What is echo physics?
An echo is a sound that is repeated because the sound waves are reflected back. Sound waves can bounce off smooth, hard objects in the same way as a rubber ball bounces off the ground. Although the direction of the sound changes, the echo sounds the same as the original sound.But sounds are not always reflected.
What is optimum reverberation?
[??p·t?·m?m riv?r·b??r?·sh?n t?m] (acoustics) The reverberation time which is most desirable for a given room size and a given use, such as speech, chamber music, or symphony orchestra.
What is echo on Iphone?
iOS 11 introduces a new screen effect for the Messages app called Echo. This effect sends multiple bubbles of whatever word(s) you have typed.Open your Messages app and select the contact or group you want to message. Type your text message in the iMessage bar as you normally would.
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