Question

The difference of sound level between two points is 30 dB. The ratio of pressure amplitude between the points
(1) 10
(2) 20
13) 30
(4) 32​

Answer 1

32

Explanation:

The loudness unit, bel is calculated  logarithmic ally.  

Increment value 1 in bel indicates the amplitude incremented by 10 units.  

Thus 10 decibels = 1 bel,  

Increment value 10 in bel indicates the amplitude incremented by 10*10 units.  

Increment value 30 in bel indicates the amplitude incremented by 10*10*10 units.  

.Level of loud sound is measured, l = $= 10log_{10}( \frac{I}{I_o}) = 30$

$\frac {I}{I_o} = 10^3$

Answer 2

Answer:

ans:32(31.65 precisely)

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