phon

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Related to Loudness Level: equal loudness contour

phon

 (fŏn)
n.
A unit of apparent loudness, equal in number to the intensity in decibels of a 1,000-hertz tone perceived to be as loud as the sound being measured.

[German, from Greek phōnē, sound; see phone1.]

phon

(fɒn)
n
(Units) a unit of loudness that measures the intensity of a sound by the number of decibels it is above a reference tone having a frequency of 1000 hertz and a root-mean-square sound pressure of 20 × 10–6 pascal
[C20: via German from Greek phōnē sound, voice]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.phon - a unit of subjective loudness
sound unit - any acoustic unit of measurement
sone - a unit of perceived loudness equal to the loudness of a 1000-hertz tone at 40 dB above threshold
References in periodicals archive ?
Even though the loudness levels of the signals used in this investigation did not vary greatly, this result indicates that of the noise characteristics evaluated, loudness perception is still the most highly linked to annoyance and distraction responses.
DTS Symmetry: Constantly monitors and balances loudness level differences between all types of digital audio formats
A conferencing function is supported by Fortemedia's proprietary Far-Field-Pickup technology in FM34-500, where the Tx voice remains the same loudness level wherever the users speak within a five-meter range.
It maximizes RMS for a given peak-to-peak limitation, can handle input level variations of over 30dB RMS, and increases loudness level for low input signals.