Some of the points of distinction between sound waves and radio waves of same frequency are:
(i) Sound waves cannot travel through free space (vacuum), but radio waves can.
(ii) Velocity of sound waves in air = 332 m/s. velocity of radio waves in free space = 3 × 108 m/s.
(iii) Velocity of sound increases with rise in temperature while velocity of radio waves is not affected by temperature.
(iv) Sound waves of frequencies ranging from 20 Hz to 20 kHz can be detected by the ear. Radio waves cannot be detected by the ear.
