What is the sound level of an air horn?
What is the sound level of an air horn? Loudness is measured in what's called decibels (dB). An air horn is 129 decibels. That's loud enough to cause immediate harm to your ears. Over time, any sound that's 85 decibels or higher can cause hearing loss — or other hearing problems, like tinnitus (a ringing sound in your ears that won't go away).
Is 150dB horn legal?
The maximum legal decibel level for a car horn on a passenger vehicle is 100-110. A train horn has a decibel level of 130-150.
How far away can 100 dB be heard?
If a sound is 100 dB at the source, it will be 94 dB at 1 meter, 88 dB at 2 meters, and so on. Therefore, you will generally be able to hear a 100 dB sound at a maximum of 16 meters.