Page 89 - Genius Kidz Prudence Learning Sc-8

MUSICAL INSTRUMENTS vibrations in air column to produce sound.

Musical instruments use vibrations of various These instruments have holes or openings
kinds to produce sound. Depending on the through which the flow of air is controlled
kind of vibrations produced they are of three manually. This changes the length of the
types: vibrating air column thereby producing
varying sounds.
1. Stringed instruments : Examples are
Guitar, Sitar , Violin, etc. These instruments 3. Percussion instruments : Examples include
use metal wires for vibrations and hence for Drum, Tabla, Bongo, etc. These instruments
producing sound. The frequency of sound is have a stretched skin whose vibrations
varied by varying the length of wire. produce sound. Loudness is increased by
striking the skin harder and pitch is
2. Wind instruments : Examples are flute,
Shehnai, etc. These instruments use increased by stretching the skin more.
Range of loudness

Range of Loudness (dB) Feeling

1-10 just audible
10-30 very quiet

30-50 quiet
50-70 moderately loud

70-90 very loud
90-120 uncomfortable

120-180 painful

Activity 1

Below are given some musical instruments, point out the vibratory or sound producing part in them.

1. Vibratory part or sound producing part

_____________________________________

Veena
2.

_____________________________________

Guitar

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