AUDIBLE, INFRASONIC AND ULTRASONIC WAVES

Sound of Class 9

AUDIBLE RANGE:

The human ear is sensitive to sound waves of frequency between 20Hz to 20 kHz. This range is known as audible range.

e.g. By vibrating sitar, guitar, organ pipes, flutes, shehnai etc.

INFRASONIC WAVE:

A longitudinal elastic wave whose frequency is below the audible range i.e. 20 Hz, is called an infrasonic wave.

it is generally generated by a large source.

e.g. : Earthquake.

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