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A company with loud machinery needs to cut its sound intensity to 44% of its original level. By how many decibels would the loudness be reduced? Use the formula L=10log I/I(o). Round to the nearest hundredth.
A) 3.57 decibels
B) 1.58 decibels
C) 2.52 decibels
D) 1.93 decibels

Respuesta :

AL2006

Reduction = 10 log (final intensity/initial intensity)

                   = 10 log (0.44 original / original)

                   =  10 log (0.44)

                   =  10 ( -0.357)

                   =       - 3.57 dB  .

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