Page 44 - WAVES

Relationship between amplitude and Relation between pitch and frequency of
loudness of sound sound

The audio signal generator is switched on and The audio signal is switched on and the

the frequency of the sound wave is adjusted to loudness is adjusted to a suitable level. The
a suitable level. The loudness of the sound is frequency of the sound is varied from low to
varied from a lot to a high level gradually. high gradually.

Observation of the shape of the sound wave Observation of the shape of the sound wave
displayed on the screen of oscilloscope. displayed on the screen of oscilloscope.

Amplitude of Loudness Wave form Frequency of Pitch of
Wave form sound wave sound
sound wave of sound

High High Low Low

Medium Medium Medium Medium

Low Low
High High
Write : Low / Medium / High

Write : Low / Medium / High
CRO

Audio signal
generator Microphone

Loudspeaker 44