Page 17 - Final Science BB Prep2 Part one (2nd term) 2024-2025_Neat

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Science Prep.2

3- Calculate the time in minutes taken by savart’s wheel to make 600 cycles, if the

Frequency of the sound produced by touching a metallic plate with a gear of 60 teeth

Is 300 Hz.
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2-Sound Intensity:

It is the property by which the ears can distinguish between strong or week
sound.

Unit of sound intensity: watt / m 2
Examples:

Whispering is described as Shouting is described as
Weak Sound Strong Sound

So that

Whispering has less intensity than Shouting

Sound intensity at a point: is the amount of sound energy falling perpendicular to a unit area

Surrounding this point in one second.

Unit of noise intensity or the level of sound intensity: decibels

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