Phon

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Phon is also the name of a town in Thailand.
Fig. 1: The Fletcher-Munson equal loudness level contours for pure tones.
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Fig. 1: The Fletcher-Munson equal loudness level contours for pure tones.

The phon is a unit of perceived loudness level LN for pure tones[1]. The purpose of the phon scale is to compensate for the effect of frequency on the perceived loudness of tones[2]. By definition, 1 phon is equal to 1 dBSPL at a frequency of 1 kHz[3]. The Fletcher-Munson curves are a way of mapping the dBSPL of a pure tone to the perceived loudness level in phons.

[edit] See also

[edit] References

  1. ^ http://www.phys.unsw.edu.au/~jw/dB.html#log
  2. ^ http://www.amazon.com/Signals-Sensation-Acoustics-Signal-Processing/dp/1563962837
  3. ^ http://hyperphysics.phy-astr.gsu.edu/hbase/sound/phon.html
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