sone2phone

sone2phone(sones)

Conversion between sones and phones, based on the work done by Hugo Fastl and Eberhard Zwicker in the article “Psychoacoustics: Facts and Models”.

Parameters:

sones (float) – One of the units in which loudness is measured. 1 sone equals to 40 phones. The conversion from sones to phones is not linear.

Returns:

phons – Logarithmic unit of loudness (phon = Ln). The dB SPL values of the signal at 1 kHz have the same value in phons. For example, 50 db SPL @ 1 kHz corresponds to 50 phones. The rest of the frequencies does not have the same co-relation between each other.

Return type:

float