Howtosignalprocessing
A whisper is about 30 dB, normal conversation is about 60 dB, and a motorcycle engine running is about 95 dB. Noise above 70 dB over a prolonged period of time may start to damage your hearing. Loud noise above 120 dB can cause immediate harm to your ears.
How noisy is 40 dBA?
40dB: a quiet library. 60dB: ordinary spoken conversation. 85dB: a food blender. 88dB: heavy traffic.
How noisy is 50 dBA?
How Loud Is 50 Decibels? 50 dB is as loud as a quiet conversation, a quiet suburb, a quiet office, or a quiet refrigerator. Notice the use of the word 'quiet' when describing this noise level? That's because all sounds between 31-60 decibels are considered quiet.
What are acceptable dB levels?
Decibel Level​
Sounds at or below 70 dBA are generally considered safe. Any sound at or above 85 dBA is more likely to damage your hearing over time.
How loud is 70 dBA?
70 decibels is as loud as a washing machine or a dishwasher. It is a moderate noise level. 70 dB noise is not considered harmful to human hearing. However, extended exposure to levels above 55-60 dB can be considered disturbing or become annoying.
