pydsm.iso226.tabled_L_N

pydsm.iso226.tabled_L_N(L_p, hfe=False)

Table of perceived loudness levels for given sound pressure in ISO 226.

This function returns a table according to ISO 226 sect 4.2.

Parameters

L_pfloat

sound pressure level in dB_SPL

hfebool

whether the table should be augmented with a data point at 20 kHz (High-Frequency-Enhanced table)

Returns

L_Narray of floats

the perceived loudness level table. Loudness levels are returned in phons

Notes

1 phon is 1 dB_SPL (sound pressure level) at 1 kHz. Sound pressure levels are measured in dBs by referring to a reference pressure level P0 (close to the hearing threshold at 1 kHz and set to 20 uPa RMS).