The wavelength of sound traveling in air with the velocity 330 m/* was found to be 66 m. If so.
(a) Find the frequency of sound.
(b) By what name are sounds of such frequency known as?
(a) V = f λ
330 = f × 66
f = 330/60 = 5.5 Hz
(b) Infrasonic (∠ 20Hz)
