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Loudness level gain volume perception dB factor volume ...

    http://www.sengpielaudio.com/calculator-loudness.htm
    Perceived loudness is a psycho-acoustic quantity that depends on sound pressure level, the frequency spectrum, and the time behavior of the sound in question. Level, Volume, and Loudness: The sone is a unit of perceived loudness proposed by Stanley Smith Stevens in 1936. That is: 40 phon or 40 dB at 1 kHz; see: Sone and phon. Perceived volume or loudness of …

Loudness volume doubling sound level ... - …

    http://www.sengpielaudio.com/calculator-levelchange.htm
    Loudness is the quality of a sound that is the primary psychological correlation of physical strength (amplitude). Loudness, a subjective feeling, is often confused with objective measures of sound pressure level SPL such as decibels. Definitions: Sound level or noise level is a physical quantity measured with measuring instruments.

Normal equal-loudness level contours - ISO 226:2003 …

    http://www.sengpielaudio.com/Acoustics226-2003.pdf
    equal-loudness contour. is a measure of sound pressure, over the frequency spectrum, for which a listener perceives a constant loudness. The unit of measurement for loudness levels is the phon, and by definition two sine waves that have equal phons are equally loud. UdK Berlin . Sengpiel . 11.2005 . Text

Sones phons loudness decibel sone 0.2 - 0.3 - 0.4 - 0.5 ...

    http://www.sengpielaudio.com/calculatorSonephon.htm
    Loudness N= 2(LN− 40)/10or loudness level LN= 40 + 10 × lb N. "lb" means logarithm base 2. 10 × lb N= 10 × log2(N) The soneis a unit of perceived loudness after a proposal of Stanley Smith Stevens (1906-1973) in 1936. In acoustics, loudness is a subjective measure

Sound level distance damping decibel ... - …

    http://www.sengpielaudio.com/calculator-distance.htm
    Loudness as a psychological correlate of physical strength (amplitude) is also affected by parameters other than sound pressure, including frequency, bandwidth, spectral composition, information content, time structure, and the duration of exposure of the sound signal. The same sound will not create the

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