Hi Paul and all (that rhymes :-), 2007/2/27, Paul Winkler <pw_lists@xxxxxxxxxx>:> On Tue, Feb 27, 2007 at 10:40:46PM +0100, Arnold Krille wrote:> > 120dB is the difference between just loud enough to be heard by your> > ear (1dB) and the loudness when the bones in your ear bow to protect> > it. At higher levels (>120dB) your ear aches but it will recover if> > the noise isn't permanent. At least thats the definition I learned...> I got my numbers from http://en.wikipedia.org/wiki/Decibel#Safety but> obviously their numbers represent some sort of typical examples; I> been in a number of discotheques (here in the US we can't pronounce> that so we just say "clubs") that had sound levels far above 100 dB.> The amount of time the ear can be exposed to a given sound pressure> level before sustaining permanent damange clearly varies a lot from> person to person. But government standards are probably a good> guideline to start with, eg. OSHA table G-16:> http://www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=STANDARDS&p_id=9735 I stand corrected, my numbers where from my physics-book which statesthat 120dB is the "Schmerzgrenze" and 0dB is the slightest whisperhuman ear can hear. Problem is that these values vary on the frequencyso there is a correction curve standardised(?) in some A-somethingpaper so these corrected values for the human ear are called db(A)... Otherwise these logarithmic power- and pressure-levels are bubbling mymind and if I don't stop thinking about theme, I will get even morescrews loose in my head. So, for the archives and the record and Paul, don't trust the words Isaid, I don't really have a clue. At least not good enough to do anargument. Happy coding and musing(?), Arnold-- visit http://www.arnoldarts.de/---Wenn man mit Raubkopien Bands wie Brosis oder Britney Spears wirklichverhindern könnte, würde ich mir noch heute einen Stapel Brenner undeinen Sack Rohlinge kaufen.
