The new noise ordinance limits continuous noises in industrial zones to 70 decibels, commercial zones to 65 decibels during the day and 60 decibels at night, while residential zones are limited to 60 decibels during the day and 50 decibels at night. An average of the two requirements will be used in a 100-foot transition area between any two zones.
Examples of noises, in decibels:
Faintest audible sound: 0 dB
Rustling leaves: 20 dB
Quiet whisper at three feet: 30 dB
Normal conversation: 60 dB
Big Blue Bus: 80 dB
Possible ear damage: 85 dB
Motorcycle from 30 feet: 88 dB
Blender at three feet: 90 dB
Power mower at three feet: 107 dB
Discomfort threshold: 115 dB
Siren: 120 dB
Chainsaw at three feet: 117 dB
Jet plane at 100 feet: 130 dB
Originally published in the Santa Monica Daily Press print edition on February 12, 2004. Read the original PDF.