sound:compute octave levels from PSD (ANSI S1.11-1986)
Last update: 31.07.2026Version: 0.0.0
Description
Compute octave-band levels from a power spectral density (PSD) input, taking into account ANSI S1.11-1986 / IEC 61260:1995. The ANSI S1.11-1986 standard describes a digital filterbank to use when computing fractional-octave-band levels from a time-domain signal. This operator applies the frequency responses of these filters to the input PSD in order to simulate the application of this filterbank. Then, every consectutive 3 one-third-octave-band levels are summed to obtain an octave-band level. Ten octave bands are considered whose center frequencies range between 31.5 Hz and 16000 Hz
Inputs
| Input | Name | Expected type(s) | Description |
|---|---|---|---|
| Pin 0 Required |
psd | field |
Input power spectral density (PSD) for the levels' computation, in |
Outputs
| Output | Name | Expected type(s) | Description |
|---|---|---|---|
| Pin 0 | levels | field |
Octave-band levels. The returned level unit is derived from the input PSD's unit (for example, if the PSD is in Pa^2/Hz, the levels will be returned in Pa^2).The field support contains the octave-band center frequencies. |
Configurations
| Name | Expected type(s) | Default value | Description |
|---|---|---|---|
| mutex | bool |
false | If this option is set to true, the shared memory is prevented from being simultaneously accessed by multiple threads. |
Scripting
Category: sound
Plugin: sound
Scripting name: None
Full name: None
Internal name: compute_octave_levels_from_psd_ansi_s1_11_1986
License: avrxp_snd_level1
Changelog
- Version 0.0.0: Initial release.
