SOUND

Unit 11
SOUND

 

After studying this unit, students will be able to:

•     explain how sound is produced by vibrating sources and that sound waves require a material medium for their propagation.

•     describe the longitudinal nature of sound waves (as a series of compressions and rarefaction).

•     define  the terms pitch, loudness and quality of sound.

•     describe the effect of change in amplitude on loudness and the effect of change in frequency on pitch of sound.

•     define intensity and state its SI unit.

•     describe what is meant by intensity level and give its unit.

•     explain  that noise is a nuisance.

•     describe how reflection of sound may produce echo.

•     describe audible frequency range.

•     describe  the importance of acoustic protection.

•     solve problems based on mathematical  relations learnt in this unit.

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