The phon was proposed as a unit of perceived loudness level LN for pure tones by S. S. Stevens. The purpose of the phon scale is to compensate for the effect of frequency on the perceived loudness of tones. By definition, 1 phon is equal to 1 dBSPL at a frequency of 1 kHz. The equal-loudness contours are a way of mapping the dBSPL of a pure tone to the perceived loudness level in phons. These are now defined in the international standard ISO 226:2003, and it should be noted that the research on which this document is based concluded that earlier Fletcher–Munson curves and Robinson-Dadson curves were in error.
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phon - music to make your ears bleed
This is the blog for Phon, a musician who is not Britney or Bob Dylan, but a ... phon remixes Black Lion. pop techno idm chanson country. noze bleed remixes ...phon.jamendo.net/blog blew up my cell phon - blogTV
blog blew up my cell phon. CREATED: Jul 1, 2008. Terms of Use. Del.icio.us. Digg it. Facebook ... All Rights Reserved. This site is run and operated by Blog TV ...www.blogtv.com/Shows/49776/b2NwbuTrbmZHbu_&pos=ancrApple iPhone
Hi, this is an Apple iPhone concept blog created by an Apple fan Okan Vardarova. ... If you saw your concept on this blog which isn't sent by you, please let me know ...www.appleiphone.blogspot.com/To retract and expand: Raleigh duo Phon is a study in getting small to ...
On its debut LP, <i>The Orm</i>, Phon is a dynamic symphony of the aggregated mundane: Entire 10-minute passages ... Citizen: News Blog. Columns. Gallery ...www.indyweek.com/gyrobase/Content?oid=oid%3A37617Cell Phones - Yahoo! Tech
Cell phone reviews and buying guides. Compare cell phones, get help, check prices, and more.tech.yahoo.com/rc/cell-phones/101The phon was proposed as a unit of perceived loudness level LN for pure tones by S. S. Stevens. The purpose of the phon scale is to compensate for the effect of frequency on the perceived loudness of tones. By definition, 1 phon is equal to 1 dBSPL at a frequency of 1 kHz. The equal-loudness contours are a way of mapping the dBSPL of a pure tone to the perceived loudness level in phons. These are now defined in the international standard ISO 226:2003, and it should be noted that the research on which this document is based concluded that earlier Fletcher–Munson curves and Robinson-Dadson curves were in error.
Although proposed as units, phons are not generally accepted according to the stringent criteria of metrology, and have not been accepted as standard units by the United States National Institute of Standards and Technology.
The phon model can be extended with a time-varying transient model which accounts for "turn-on" (initial transient) and long-term, listener fatigue effects. This time-varying behavior is the result of psychological and physiological audio processing. The equal-loudness contours on which the phon is based apply only to the perception of pure steady tones; tests using octave or third-octave bands of noise reveal a different set of curves, owing to the way in which the critical bands of our hearing integrate power over varying bandwidths and our brain sums the various critical bands.
See also
- Sone
- A-weighting
References
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