Page 88 - Genius Kidz Prudence Learning Sc-8

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Sound

Sound is a kind of sensation perceived by our brain and received or detected by our ears. Vibration is a mechanical
phenomenon whereby oscillations occur about a central position, and produce sound. Sound travels through air. Some
sounds are pleasant to hear whereas others are classified as “noise”– which are unpleasant to hear.

Discussion

Jack : Sound ! is of music……. my Suzi : Hi ! Jack ….. the last
v o i c e . . . . I k n o w chapter……. Chapter was
everything so why should ausum.
I read it?

Suzi : Sound is produced by a
Jack : Hello…. Yes I know that guitar…….
was but what about
sound………

Suzi : No, Jack…… It's true…….
Jack : Are you kidding me? Let us look upon the
chapter.

SOUND
Definition : Sound is a kind of sensation
perceived by our brain and received or

detected by our ears. The unit of sound
measurement is decibel (dB).
Vibrating instruments produce sound :

Vibration is a mechanical phenomenon
whereby oscillations occur about a central
Tuning fork Gong of hammer of Strings of a
position. an electric bell violin

For example, movement of a tuning fork, Almost all musical instruments produce sound
strings of violin, gong of electric bell, etc. due to their vibrations.

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