Decibel...
Decibel (dB) is a logarithmic unit to measure sound or electronic signal levels. For the purpose of this blog, I'll use it in audio... sound levels.On another blog, a member will be going to a Formula One race and it's suggested they bring along hearing protection as often race cars develop noise of over 130 dB. Two weeks ago, I attended an outdoor concert and used ear plugs to lower the sound of the performance. It didn't bother my friend, but for me, the volume was louder than I wanted to be subjected to.
The decibel scale In basic terms: zero dB is the threshold of human hearing and a whisper would be 25-30 dB. Normal conversation is 60-70 dB and a lawn mower (at 6' feet) is around 100 dB. Most scales I've seen rate 125 dB as a level of pain and a jet engine at 100 feet away would be 140 dB.
Some sound ratings in the work force, like the noise from a wood chipper or jack hammer where used continuously poise serious problems of hearing loss. A blast from a shot gun could register 170 decibels. Although it's only a split second of noise, a few of those could permanently harm ones hearing. I know 2 people who lost most of their hearing... one guy had the job of refueling helicopters in Vietnam. The aviator hearing protection always fell off as they scrambled to get the helicopters back in the air and he now has dual hearing aids supplied by the VA. The same for my uncle who had the assignment to load bullets on the guns of a battleship during WWII.
When we were kids, it's was rare to have a car stereo more than 20 watts. It's become commonplace to see custom shops installing 1,000 watt systems in cars now!
When talking to one of those guys (with a megapower system), it won't be long before their first word is... huh?
