Question: I noticed you have decibels listed for interior noise and sound. What are decibels, and how loud is 75 Db?
Answer:
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Originally Posted by brentil
If you're into computers a 6000rpm to 7000rpm CPU heatsink is about 55db.
Problem is with db the value increases by factors of 10 as you go up. A race car with a very open exhaust without a catylitc converter is usually around 105db which is extremely loud.
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Originally Posted by dls6774
Here's a site that gives sound levels for various things and also a list of various noise levels and how long you can listen before doing damage to your hearing.
http://www.freehearingtest.com/noiselimits.shtml
An amplified rock band is listed at 120dB
a jackhammer at 130dB
and a 12ga shotgun with an 18" barrel at 161.5 dB
75dB is compared to kitchen appliances. Although they didn't say which ones... |
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Originally Posted by padgett
Decibels (db) are an expression of sound *pressure* and is really meaningful when coulpled with a distance (xxx db at xxx feet). One of the old government "emissions" requirements was 50 db at 50 feet for a WOT drive-by.
db is measured on a log scale - it doubles for every 3 db so 87 db is half the sound pressure of 90 db.
For some reason people find very high pressure vibrations pleasurable hence the rise of automotive boom-boxes. I suspect my Beltone stock is going to continue to go up.
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