You found the average sound pressure levels for each octave band given in table below. Also shown are the transmission losses for the proposed barrier. Determine the sound pressure level loss you may expect for enclosure built of this material. What noise reduction would you advise an employer or client they might expect?
|
Frequency
|
250 Hz
|
500 Hz
|
1 kHz
|
2kHz
|
4 kHz
|
|
SPL (dBA)
|
99
|
95
|
102
|
104
|
95
|
|
TL (dB)
|
18
|
22
|
25
|
30
|
28
|