Question

Two waves having sinusoidal waveforms have different wavelengths and different amplitudes. They will be having:

• A. same pitch and different intensity
• B. same quality and different intensity
• C. different quality and different intensity
• D. same quality and different pitch

Answer 1

Answer: (A)

Pitch is that characteristic of sound which enables one to distinguish between a shrill sound and a grave sound. It depends upon the frequency of the source. While intensity of sound is proportional to the square of amplitude $(I=k{a}^2),$ hence different amplitudes have different frequencies. Also quality depends upon the number, order and relative intensity of the overtone.