What is the reflection of sound called? What are the conditions for it to be heard?Why cant we hear it in a room full of objects? What is the formula for the calculation of it and why? ( SPAMMERS BE AWAY!)
Answers
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Answer:
Hey there ! To answer your question, Let me first tell you what is sound, and what is the speed of it.
What is sound?
Ans. Sound is nothing but the vibration of objects.
What is the speed of sound in air, water and solid?
Ans. Air: 343m/s
Water: 1500m/s
Solid: 6000m/s
The speed of sound in soli is the highest as the molecules are closest to each other, thus the vibrations of sound can pass through it easily.
Explanation:
So, following the defenition of sound, let us answer your question:
What is the reflection of sound called?What are the conditions for it to be heard?Why cant we hear it in a room full of objects? What is the formula for the calculation of it and why?
So, lets answer the 1st part:
What is the reflection of sound called?
Ans. Reflection of sound is known as echoes.
What are the conditions for it to be heard?
Ans. Conditions for echoes to be heard:
1. the reflected should come after 0.1 second (persistence of hearing), so that the sound can be distinguished as 2 different sounds.
2. Minimum distance between the voice and the object should be 17.2 meters.
3.There should be minimal or no objects in the room, as the object absorbs sound waves.
Why cant we hear it in a room full of objects?
Ans. We can’t hear echoes in the room full of objects, as the objects absorb the sound, thus there is less sound for reflection.
What is the formula for the calculation of it and why?
Ans. Formula for distance related to an echo: 2d=speed*time. (As the distance that needs to calculated of sound should include the reflection of sound going to and fro from the surface thus 2d (distance 2 times).
Hope it helped! Please mark as the brainliest answer!! : )
•The reflection of sound is called an echo.
•The conditions to hear an echo are:-
a) The minimum distance between the source of sound and the reflecting body should be 17m.
b) The loudness of sound should be sufficient so that it can be heard after its reflection.
c) The reflector should have a large area for enough reflection of sound and it should be hard too.
•We can't hear an echo in a room full of objects because the time for the echo to return is very small in a room so you will not hear an echo, instead you will get a resonance type echo, like when you sing in the bathroom. Most rooms are full of soft furnishings that quickly absorb the sound and damp the resonance.
•Formula for distance of an echo: 2×distance=speed×time. As the distance that needs to calculate sound should include the reflection of sound going to and from the surface, 2×distance.
Hope it helps you,
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