Reverberation

Q. The outer case of the bell in a temple is made big. Give a reason.

Q.

Why cannot we hear any sound outside a cinema hall whole the show is on?

Q.

Why are the ceilings of concert halls curved?

Q.

Sound produces sensation of

1. sight

2. smell

3. hearing

4. touch

Q. Write true or false for statement​

• A ticking clock sound is heard late when heard through a metal.​

Q.

Why are the ceilings of concert halls curved?

Q.

What do you mean by reflection of sound?

Q.

Why the roof and the walls of an auditorium are covered with sound-absorbing materials?

1. To reduce echo

2. To increase loudness

3. To reduce multiple reflections

4. To control frequency

Q.

In a big hall, the sound gets reflected inside the hall multiple times. The repeated reflection that results in this persistence of sound is called reverberation. This phenomenon can be observed in open air auditoriums.

1. True

2. False

Q. Sound requires a medium to propagate.

1. True
2. False

Q. The outer case of the bell in a temple is made big. Give a reason.

Q.

What is reverberation?

1. Multiple reflections that result in persistence of sound

2. Inverse of direct sound

3. Inverse of an echo

4. Product of direct and reflected sound

Q. The walls of the auditorium built for musical concerts should be such that they are able to ______ sound. Fill in the banks.

1. Transmit
2. Refract
3. Reflect
4. Absorb

Q. List the measures that you will take when designing a sound proof room.

Q. Bells are made of metal and not of wood because

1. The density of the metal is greater than that of wood
2. Wood dampens vibrations faster
3. Metals are elastic than wood
4. The sound is not conducted by metals but is radiated