Question

Two sounds of same loudness and same pitch produced by the two different instruments differ in their:

(a) amplitudes (b) frequencies

(c) wave forms (d) all the above.

Answer 1

The correct choice is (c).

The waveform of a sound depends on the number of the subsidiary notes and their relative amplitude along with the principal note. The resultant vibration obtained by the superposition of all these vibrations gives the waveform of sound. Since their loudness and pitch is the same, amplitude and frequency will be the same. However, they will differ in waveforms.