[A] : Ultrasound (in sonography ) is the sound beyond the range of human hearing
[R] : Vibrations crysalts is the source of ultra-sound

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[A] : Ultrasound (in sonography ) is the sound beyond the range of human hearing [R] : Vibrating crystals is the source of ultrasound

The audible range of sound for human being.

What is ultra sound?

The audible range of sound for human beings is from:

State the safe limit of sound level in terms of decibel for human hearing.

Any ................ (vibrating/hot) body is a source of sound .

A normal human being can hear sounds in the frequency range of ______.

What is the range of frequencies associated with (a) infra sound (b) ultrasound ?

The audible range of sound for an average adult human being is ______.