How loud is an air raid siren?

As are the strong air compressors. most compressors would be between 70 dB and 90 dB, but if they are not specially designed to remain quiet, the noise they make will be more likely about 80-85 dB, which is not so quiet, for starters.As the strong air compressors are... most compressors would vary between 70 dB and 90 dB, but if they are not specially designed to remain quiet, the noise they make will be more likely around 80-85 dB, which is not so quiet, for starters.

A properly installed geothermal heat pump shouldn't be noisy. I've been next to some who are so quiet that they have to get their hands on them to see if they're in the process.

Sonic booms generate huge amounts of sound energy, playing a lot like an explosion, usually the shock face can be close to 100 megawatts per square metre, and can exceed 200 decibels. When an airplane is close to the sound barrier, an unusual cloud sometimes forms behind it.

A very quiet air conditioning can only make about 25 decibels of noise, which is only stronger than a murmur. The portable air conditioning becomes strong as 55 decibels. It is a little stronger than a refrigerator that acts normally, which is usually about 40 decibels.Portable air conditioners become as strong as 55 decibels. A very quiet air conditioner could only make about 25 decibels of noise, which is only stronger than a shock. The levels of the air conditioning decibel vary greatly.

Although people usually hear it 100 miles away, in one case... obviously this depends on atmospheric performance, larger explosions can be felt at greater distances.Although people have generally heard 100 miles away, in one case. obviously that depends on atmospheric performance, larger explosions can be heard at greater distances.