Question

Audio frequency range lies between _________

(a) 2 MHz to 20 MHz

(b) 20 Hz to 20 KHz

(c) 20 KHz to 200 KHz

(d) 20 MHz to 200 MHz

This question was posed to me by my school principal while I was bunking the class.

Origin of the question is Pre Emphasis and De Emphasis in section Receivers & Transducers of Analog Communications

Answer 1

The correct answer is (b) 20 Hz to 20 KHz

The best I can explain: As per standards audio frequency range lies in between 20 Hz to 20 KHz. This is the human audible range.