Q22 of 118 Page 352

If the sound level in a room is increased from 50 dB to 60 dB, by what factor is the pressure amplitude increased?

Given:
Initial sound level
Final sound level



Constant reference intensity




We can find initial intensity using:



⇒


On solving, we get:




Similarly,




On substituting the values and solving, we get:



As the intensity is proportional to the square of pressure amplitude
we have:



∴


Hence, the pressure amplitude is increased by factor.


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