When we increase the loudness of sound of a TV, the property of sound that changes is
A. amplitude

B. frequency

C. wavelength

D. speed

A man is lying on the floor of a large, empty hemispherical hall, in such a way that his head is at the centre of the hall. He shouts “Hello!” and hears the echo of his voice after 0.2 s. What is the radius of the hall? (Speed of sound in air = 340 m/s)

How do you appreciate efforts of a musician to produce melodious sound using a musical instrument by simultaneously controlling frequency and amplitude of the sounds produced by it.

When we increase the loudness of sound of a TV, the property of sound that changes is

The characteristic of the sound that describes how the brain interprets the frequency of sound is called ( )

Why is soft furnishing avoided in concert halls?

Explain how echoes are used by bats to judge the distance of an obstacle in front of them.

With the help of a diagram describe how compression and rarefaction pulses are produced in air near a source of sound.

What do you understand by a sound wave?