phone2spl

phone2spl(phones, tf, af, lu)

Conversion from phones to Sound Pressure Level (dB SPL), based on the standard ISO/FDIS 226:2003.

Parameters:

• phones (float) – Logarithmic unit of loudness (‘phon’ = Ln).

• tf (float) – Threshold of hearing.

• af (float) – Exponent used for loudness perception.

• lu (float) – Factor of the linear transfer function normalized at 1 kHz.

Returns:

spl – Sound pressure level (‘dB SPL’).

Return type:

float