Page 15 - Final Science BB Prep2 Part one (2nd term) 2024-2025_Neat

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Science Prep.2

Life application:

Ear plugs: made of silicon used to avoid noise in loud places.

The Properties of Sound Waves:

1-Sound pitch:

It is the property by which the ears can distinguish between harsh and sharp

voices

The voice of woman is High Pitched as it is The voice of man is Low Pitched as it is
sharp. Harsh (Rough).

Pitch changes by changing the length of the vibrating part.

Sound pitch depends on frequency.

Sharpness of the sound increases as the frequency increases.

Harshness of the sound increases as the frequency decreases.

Note

By increasing the length
of the string The sound
The frequenvy
or becomes low
decreases
the vibrating of the air Pitched
coulumn

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