APPENDIX B: OCTAVE-BAND BREAKDOWNS

   The octave-band breakdowns of the dBA limits used in this chapter shall be:

   (A)   For a residential zone: (55 dBA)

Octave-band center frequency (Hz)	Maximum boundary SPL (dB)
31.5	72
63	71
125	65
250	57
500	51
1,000	45
2,000	39
4,000	34
8,000	32

 

   (B)   For a commercial zone: (64 dBA)

Octave-band center frequency (Hz)	Maximum boundary SPL (dB)
31.5	79
63	78
125	73
250	67
500	61
1,000	55
2,000	50
4,000	46
8,000	43

 

   (C)   For an industrial zone: (66 dBA)

Octave-band center frequency (Hz)	Maximum boundary SPL (dB)
31.5	80
63	79
125	74
250	69
500	63
1,000	57
2,000	52
4,000	48
8,000	45