What are the wavelength, frequency, time period and amplitude of a sound wave?

(a) Wavelength — The distance between two consecutive compressions (C) or two consecutive rarefactions (R) is called the wavelength. The wavelength is usually represented by λ (Greek letter lambda). Its SI unit is metre (m).

(b) Frequency — The number of complete oscillations per unit time is the frequency of the sound wave. The SI unit of frequency is hertz (Hz). It is usually represented by the letter ν.

(c) Amplitude — The magnitude of the maximum disturbance in the medium on either side of the mean value is called the amplitude of the wave. It is usually represented by the letter A.

(d) Time period — The time taken by two consecutive compressions or rarefactions to cross a fixed point is called the time period of the wave. It is represented by the symbol T. Its SI unit is second (s).