The Homa Files

The Decibel (dB) scale measures noise in objective terms.

On the Decibel scale, each 10 points [dB(A)] added represents 10 times as much sound.

For example; 70 dB(A), is not 17% louder, but ten times as loud as 60 dB(A).

• Threshold of human hearing: 0 dB(A)
• Soft whisper: 20 dB(A)
• Refrigerator: 50 dB(A)
• Normal conversation: 60 dB(A)
• Dishwasher running: 55-70 dB(A)
• Busy street traffic: 70 dB(A )
• Car interior: 75 dB(A)
• Vacuum cleaner: 80 dB(A)
• Common home stereo: 80 dB(A)
• Lawn mower: 90 dB(A)
• Rock concert: 110 dB(A)

http://library.rusbiz.com/article_index.html?cat=123&id=34092&seo_name=Quiet_Air_Purifier_-_What_You_Should_Know_Before_Purchase

This entry was posted on January 11, 2011 at 6:12 am and is filed under Cool Stuff, Factoids. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.