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In measuring the sound transmission class of a 30 m^2 partition, the band level in the source room was kept constant at 90 dB, and for each 1/3-octave band from 125 to 4000 Hz the band levels and total sound absorption A (in square meters) in the receiving room were: (band level, A) = (65, 15), (51, 15), (44, 16), (48, 17), (44,19), (42,20), (47,25), (40,28), (39,30), (35,32), (34,36), (35,45), (33,53), (32,60), (34,60), and (37,60). Find the STC of the partition.

In measuring the sound transmission class of a 30 m^2 partition, the band level in the source room was kept constant at 90 dB, and for each 1/3-octave band from 125 to 4000 Hz the band levels and total sound absorption A (in square meters) in the receiving room were: (band level, A) = (65, 15), (51, 15), (44, 16), (48, 17), (44,19), (42,20), (47,25), (40,28), (39,30), (35,32), (34,36), (35,45), (33,53), (32,60), (34,60), and (37,60). Find the STC of the partition.

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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In measuring the sound transmission class of a 30 m^2 partition, the band level in

the source room was kept constant at 90 dB, and for each 1/3-octave band from

125 to 4000 Hz the band levels and total sound absorption A (in square meters)

in the receiving room were: (band level, A) = (65, 15), (51, 15), (44, 16), (48, 17),

(44,19), (42,20), (47,25), (40,28), (39,30), (35,32), (34,36), (35,45), (33,53), (32,60),

(34,60), and (37,60). Find the STC of the partition.

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