Taken from NATA Report No. 659-85
 

...........RESULTS :

 

Third Octave Band
Centre Frequency
(Hz)
Average Sound Pressure Level
Difference
(dB)
CAC
46
Deficiencies

(dB)

125 31 31 0
160 31 34 3
200 35 37 2
250 38 40 2
315 36 43 7
400 41 46 5
500 46 47 1
630 48 48 0
800 48 49 0
1000 47 50 3
1250 47 51 4
1600 50 51 1
2000 53 51 -
2500 55 51 -
3150 56 51 -
4000 58 51 -
5000 59 51 -
       
  TOTAL DEFICIENCIES : .......28

 

The ceiling attenuation class (CAC) was ...........................47

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