State the main components of a hearing aid.

One Line Answer

The main components of hearing aid are microphone , amplifier and earphone.

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Chapter 7 Sound
Range of Hearing | Q 19 | Page 284

Complete the following sentence:

Ultrasound is of frequency ___________.

Complete the following sentence:

Infrasonic sound is of frequency ______________.

Name the sound of the frequency given below:

10 Hz

A man can hear the sound of frequency :

What do you understand by the term sonic vibrations? State the range of sonic vibrations for the human ear.

What is Galton’s whistle? To what use is it put?

Ultraviolet radiation has a wavelength of 300Å. If the velocity of the electromagnetic wave is 3 × 10⁸ ms^-1. Calculate:

What are infrasonic and ultrasonic sounds?

What does SONAR stand for? Where do we make use of SONAR?

Ultrasound has frequency of vibration