OAR 340-035-0035
Table 10
Median Octave Band Standards
For Industrial and Commercial Noise Sources
Allowable Octave Band Sound Pressure Levels
Octave Band Frequency (Hz)
7:00 a.m. – 10:00 p.m.
10:00 p.m. – 7:00 a.m.
31.5
68
65
63
65
62
125
61
56
250
55
50
500
52
46
1000
49
43
2000
46
40
4000
43
37
8000
40
34