Page 18 - Final Science BB Prep2 Part one (2nd term) 2024-2025_Neat

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Science Prep.2

Factors affecting the sound

intensity:

1-The distance between 2-The amplitude 3-The area of 4-The 5-The wind
the ear and the sound of vibration of the the vibrating medium direction
source sound source surface density

through
which the
sound travels

-Sound intensity -Sound intensity -Sound Sound -Sound
decreases gradually as decreases intensity intensity intensity
the distance between gradually by increases when increases as increases

the source of sound and decreases the the mobile is the medium when
the ear increases. amplitude of the put on the box density direction of
vibration. (resonance increases and wind and it is
This is because:
body). vice versa.
This is because: in the same
Inverse Square Law: Note:
Sound intensity at a Sound intensity at -Stringed direction of
point is inversely a point is directly musical wind.

proportional to the proportional to instruments Or
square distance the such as (guitar -Sound
between the sound square of the and violin) the intensity

source and this point. amplitude of the strings are decreases
(I) vibration of sound fixed above an when
source. empty wooden direction of
box (resonance wind and it is
box) to increase in the
the sound opposite
intensity. direction of
2
(d )
wind.

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