Sage-Tips

What is the maximum sound limit?

Eighty-five decibels is considered the highest safe exposure level up to a maximum of eight hours. The permissible time for safe listening decreases as sound levels increase. For example, a sound as high as 100 dB – the level produced by a subway train – can be safely listened to for only 15 minutes each day.

What is the upper limit of sound for residential area?

Notes: Central Pollution Control Board (CPCB) has declared the permissible noise level in India for different areas. In industrial areas, it is 75 dB (daytime) and 70 dB (night). In commercial areas, it is 65 dB and 55 dB respectively and in residential areas it is 55 dB and 45 dB.

What is 55 dB noise level?

Example of decibels

DECIBEL	SOUND	EXAMPLE
55		Percolating coffee-maker
60	Audible	Sound of human voice, machinery
70	Irritating	Television set on loud, vacuum cleaner, several people on the telephone
75	Constant sound	Busy restaurant around lunchtime

What is high noise level?

Normal conversation is about 60 dB, a lawn mower is about 90 dB, and a loud rock concert is about 120 dB. In general, sounds above 85 are harmful, depending on how long and how often you are exposed to them and whether you wear hearing protection, such as earplugs or earmuffs.

Is there a maximum dB?

Strictly speaking, the loudest possible sound in air, is 194 dB. The “loudness” of the sound is dictated by how large the amplitude of the waves is compared to ambient air pressure. A sound of 194 dB has a pressure deviation of 101.325 kPa, which is ambient pressure at sea level, at 0 degrees Celsius (32 Fahrenheit).

Is 71 dB loud?

Common Sources A normal conversation: 60-70 dB. Open office noise: 65-75 dB. An alarm clock: 70-80 dB. Washing machine: 70 dB.

How far away can 70 decibels be heard?

Distance and perception of voice.

Distance	Voice Level (dB PSIL)
(ft)	(m)	Normal
1	0.3	70
3	0.9	60
6	1.8	54