Question

Human audible frequency range is 20Hz to 20KHz. If velocity of sound in air is 340m/s, the minimum wavelength of audible sound wave is

• A. 0.17mm
• B. 1.77mm
• C. 17mm
• D. 170mm

Answer 1

Answer: (C)

17mm

Using the well known relation between wavelength frequency and velocity of a wave,

V $=\nu \lambda$

$\frac{340}{20}$ > $\lambda >\frac{340}{20000}$

Thus,

$\lambda =[0.017,17]$ in meters