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Calculate the transmission loss given the sound levels measured on either side of the wall is 60 dB and 40 dB.

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Calculate the transmission loss given the sound levels measured on either side of the wall is 60 dB and 40 dB.

(a) 20 dB

(b) 100 dB

(c) 60 dB

(d) 2400 dB

This question was posed to me in my homework.

This key question is from Acoustics in division Acoustics and Ventilation of Construction & Building Materials

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The correct answer is (c) 60 dB

For explanation I would say: Reduction in the sound intensity during the transmission of sound from the source to the adjoining area is known as transmission loss. The transmission loss is numerically equivalent to the loss in the sound intensity in decibels. Hence, it is given by 60-40 dB = 20 dB.

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