Identify the range of frequencies that characterises ultrasound.

PHYSICS · Single correct · CBSE · Physics · Sound · Sound

Problem

Identify the range of frequencies that characterises ultrasound. (a) Less than

20\,\text{Hz}

(b) Between

20\,\text{Hz}

and

20\,\text{kHz}

20\,\text{kHz}

(d) Between

2\,\text{kHz}

and

20\,\text{kHz}