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_p : float
sound pressure level in dB_SPL
hfe : bool
whether the table should be augmented with a data point at 20 kHz (High-Frequency-Enhanced table)
Returns: L_N : array 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).