Q7. A 2m X 2m X 2m enclosure is constructed around a small compressor. The enclosure is made of a lightweight metal with a transmission loss of 26 dB at 500 Hz. The average absorption coefficient in the enclosure is 0.3 in the 500 Hz octave frequency band. The compressor generates a sound power level of 105 dB in the 500 Hz octave band. Calculate the A-weighted sound power level radiated by the exterior of the enclosure. Assume the interior of the enclosure is diffuse. (Answer : 84.7 dB(A))

Q7. A 2m X 2m X 2m enclosure is constructed around a small compressor. The enclosure is made of a lightweight metal with a transmission loss of 26 dB at 500 Hz. The average absorption coefficient in the enclosure is 0.3 in the 500 Hz octave frequency band. The compressor generates a sound power level of 105 dB in the 500 Hz octave band. Calculate the A-weighted sound power level radiated by the exterior of the enclosure. Assume the interior of the enclosure is diffuse. (Answer : 84.7 dB(A))