The amplitude of sound wave is 4:5. Find its loudness intensity and frequency

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Solution

$L o u d n e s s i s p r o p o t i o n a l t o a m p l i t u d e o f w a v e \frac{L_{1}}{L_{2}} = \frac{A_{1}}{A_{2}} = \frac{4}{5} W a v e l e n g t h o f S o u n d i n c r e a s e s w h e n l o u d n e s s d e c r e a s e s m e a n s f r e q u e n c y i n c r e a s e s . \frac{F_{1}}{F_{2}} = \frac{4}{5}$

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