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Phon |
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phon [fän]
(acoustics) A unit of loudness level; the loudness level, in phons, of a sound is numerically equal to the sound pressure level, in decibels, of a 1000-hertz reference tone which is judged by listeners to be equally loud to the sound under evaluation. loudness level Of a sound, the sound-pressure level of an equally loud 1,000-Hz pure tone, expressed in units called phons. Phon the unit of loudness level. Since sounds of differing intensity—that is, of differing sound pressure—may have the same loudness at different frequencies, the loudness of a sound is evaluated by comparing it with the loudness of a pure reference tone, usually a tone with a frequency of 1,000 hertz (Hz). One phon is the difference between the loudness levels of two sounds of a given frequency whose intensities, or sound levels, at a frequency of 1,000 Hz differ by 1 decibel (dB). For pure tones with a frequency of 1,000 Hz, a difference of 1 phon in loudness level is equal to a difference of 1 dB in sound level. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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| Mentioned in | ? | References in periodicals archive | ? | Encyclopedia browser | ? | Full browser | ? | |||
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No references found | Before the modifications to their home, Phon had to bathe him and fully support him up stairs. They were a very phon -etical crowd, a very good crowd," he said. A group of people in one village, Phon Kham, explained to the Jhai Foundation (www. |
Phon |
Pholiota flavida Pholiota mutabilis Pholiota nameko Pholiota squarrosa Pholiota squarrosa-adiposa Pholiota squarrosoides Pholis Pholis gunnellus Pholistoma Pholistoma auritum Pholiurus Pholus Phom Penh Phom Penh Phoma herbarum Phoma Infections Phoma spp Phomaceae Phomales phomopsins Phomopsis amygdali Phomopsis leptostromiformis PHOMP Phomvihan Kaysone Phomvihane Phomvihane Phon phon(e)yphon(o)- phon- phon- phon. Phonaesthesia Phonaesthetics Phonaesthetics Phonaesthetics Phonaesthetics phonagnosia phonal phonal Phonascetics phonasthenia phonasthenia phonasthenia phonasthenia phonate phonate phonate phonate phonated phonated phonated phonated phonates phonates phonates phonates | |||||||
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