Which one Is more loud sound?

Refer to the graph given here. Which of the following sound waves is low-pitched but loud?

Which of the following parameters determines the loudness of sound ?

What determines the loudness of sound ?

A source of sound emits 200 piW power which is uniformly distributed over a sphere of radius 10 m. What is the loudness of sound on the surface of the sphere?

The pressure variation that correspond to pain threshold (i.e., the ear can tolerate in loud sound) is about 30 Pa. velocity of sound in water is sqrt(2)xx10^3m//s . The intensity of sound wave produced in water corresponding to loud sound is

Consider the following sound waves marked A,B, C and D: (a) Which two waves represent sounds of the same loudness but different pitch? (b) Which two waves represent sounds of the same frequency but different loudness? (c) State whether all these sound waves have been produced by the same vibrating body or different vibrating bodies? (d) Which vibrating body/bodies could have generated the sound waves shown here?

Explain why the loudness of a sound note varies with the distance from the source of sound