Octave Band Center Frequency, Hz. Octave Band Sound Pressure Level, dB Octave Band Sound Pressure Level, dB Octave Band Sound Pressure Level, dB Octave Band Sound Pressure Level, dB

Time 7a.m.-10p.m. 10p.m.-7a.m. 7a.m.-10p.m. 10p.m.-7a.m. 24 hours 24 hours

31.5 96 86 86 76 96 86

63 82 71 72 61 82 72

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125 74 61 64 51 74 64

250 67 53 57 43 67 57

500 63 48 53 38 63 53

1,000 60 45 50 35 60 50

2,000 57 42 47 32 57 47

4,000 55 40 45 30 55 45

8,000 53 38 43 28 53 43

Note: When octave measurements are made, the sound from the source must be constant in level and character. If octave band sound pressure level variations exceed plus or minus 2 dB in the bands containing the principal source frequencies, discontinue the measurement.

291-8 Sound Production Devices

No person shall cause, suffer, allow, or permit the operation of any sound production device in such a manner that the sound crosses a property line and raises the total sound levels above the neighborhood residual sound level by more than the permissible sound level limits set forth in Table IV when measured within the residence of a complainant according to the measurement protocol in VI(B) of this ordinance. These sound level measurements shall be conducted with the sound level meter set for "C" weighting, "fast" response.

TABLE IV

MAXIMUM PERMISSIBLE INCREASE IN TOTAL SOUND LEVELS WITHIN A RESIDENTIAL PROPERTY

291-9 Restricted Uses and Activities

• The following standards shall apply to the activities or sources of sound set forth below:
• A.Excluding emergency work, power tools, home maintenance tools,
• landscaping and/or yard maintenance equipment used by a residential property owner or tenant shall not be operated between the hours of 8:00 p.m. and 8:00 a.m., unless such activities can meet the applicable limits set forth in Tables I, II.