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Scroll down to related links and use the nice calculator "Correlation between sones und phons - Loudness level LN in phons to loudness N in sones and Loudness N in sones to Loudness level LN in phons"
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You can convert the loudness in sones to the loudness level in phons. 4 sones equals 60 phons. Scroll down to related links and read "Correlation between sones und phons".
The unit of perceived loudness equal to 40 phons is 40 decibels (dB). Decibels are commonly used to measure the intensity of sound, with 40 dB typically considered as a moderate level of loudness.
You can convert the loudness in sones to the loudness level in phons. 8.5 sones equals 70.9 phons. The convertion from sone to dB is only a guess. Scroll down to related links and read "Correlation between sones und phons".
Units used to measure loudness are Sone (loudness N) and Phon (loudness level L). 40 Phons = 1 Sone. Scroll down to related links and look at "Loudness - Wikipedia" and "Sound level change and the change of the respective factor of volume and loudness"
50 phons (decibels) is equivalent to 2 sones.
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It is impossible to convert dB to dBA. There is only a guess. Scroll down to related links and read "Correlation between sones und phons".
The sone was proposed by Stanley Smith Stevens as a unit of perceived loudness in 1936. Loudness is the subjective perception of sound pressure. According to Stevens' definition, the sone is equivalent to 40 phons, which is defined as the loudness level of a 1 kHz tone at 40 dBSPL. The number of sones to a phon was chosen so that a doubling of the number of sones sounds to the human ear like a doubling of the loudness.
The sound level in decibels (dB) required for a 1 sone loudness at a frequency of 50 Hz would be around 40 dB. This is because 1 sone is approximately equal to 40 phons, and for a 50 Hz tone, 40 phons is equivalent to around 40 dB SPL (Sound Pressure Level).
You can convert the loudness in sones to the loudness level in phons. To convert the sound pressure level in dB or dBA to loudness in sones is not possible. Scroll down to related links and read "Correlation between sones und phons".