Decibel Limits: Cambridge vs Newton
How do decibel limits rules compare between Cambridge, MA and Newton, MA?
Newton has fewer restrictions than Cambridge.
Cambridge, MA
Middlesex County
Cambridge enforces numerical decibel limits: 60 dBA day and 50 dBA night at residential receptors, with a 5 dBA penalty for tonal or impulsive sounds.
View full Cambridge rules →Newton, MA
Middlesex County
Newtons noise ordinance sets property-line decibel thresholds that differ by zoning district and time of day, with residential receivers protected most strictly.
View full Newton rules →Key Facts Comparison
| Fact | Cambridge | Newton |
|---|---|---|
| Day Limit | 60 dBA (7 AM to 10 PM) | - |
| Night Limit | 50 dBA (10 PM to 7 AM) | - |
| Tonal Penalty | Plus 5 dBA | - |
| Measurement | Type 2 meter at property line | - |
| Low-Frequency | Separate assessment available | - |
| Residential day | - | About 55 dBA at property line |
| Residential night | - | About 45 dBA |
| Business | - | 60 to 65 dBA daytime |
| Impulse/tone penalty | - | 5 dBA adjustment |
| Exempt | - | Emergency, snow, DPW |
Highlighted rows indicate differences between cities.
Cambridge FAQ
What is a dBA versus dB?
dBA is A-weighted decibels, which adjusts for human hearing sensitivity. Cambridge uses dBA for most limits, with special handling for low-frequency sound.
How loud is 50 dBA?
About the level of a quiet refrigerator or light rainfall, roughly 15 feet from a normal conversation.
Newton FAQ
How is sound measured for enforcement?
Newton uses calibrated Type 2 sound meters at the receiving property line during the time of complaint.
Are fireworks or alarms exempt?
Emergency equipment and some short-duration activities are exempt, though ongoing alarm malfunctions can be cited.
Compare other topics
See how Cambridge and Newton compare on other ordinance categories.
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