Audible, ultrasonic and infrasonic waves

Sound of Class 8

Audible, ultrasonic and infrasonic waves

AUDIBLE WAVE:

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

e.g. Waves produced by vibrating sitar, guitar, organ pipes, flutes, shehnai etc.

INFRASONIC WAVE:

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

It is generally generated by a large source. e.g. Earthquake.

ULTRASONIC WAVE:

A longitudinal wave whose frequency is above the upper limit of audible range i.e. 20 kHz, is called ultrasonic wave. It is generated by very small sources. e.g. Quartz crystal.

audible,-ultrasonic-and-infrasonic-waves

 

Further Reading :

1. Range of Hearing

2. Noise

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