FiltFreqWeight¶

class acoular.tprocess.FiltFreqWeight¶

Bases: Filter

Apply frequency weighting according to IEC 61672-1.

This filter implements frequency weighting curves commonly used in sound level meters for noise measurement. It provides A-weighting, C-weighting, and Z-weighting options.

See also

Filter

Base class for implementing IIR filters.

Notes

• The filter is designed following IEC 61672-1:2002, the standard for sound level meters.

• The weighting curves are implemented using bilinear transformation of analog filter coefficients to the discrete domain.

weight = Enum('A', 'C', 'Z', desc='frequency weighting')¶

Defines the frequency weighting curve:

• 'A': Mimics human hearing sensitivity at low sound levels.

• 'C': Used for high-level sound measurements with less attenuation at low frequencies.

• 'Z': A flat response with no frequency weighting.

Default is 'A'.

sos = Property(depends_on=['weight', 'source.digest'])¶

Second-order sections (SOS) representation of the filter coefficients. This property is dynamically computed based on weight and the Filter.source’s digest.

digest = Property(depends_on=['source.digest', 'weight'])¶

A unique identifier for the filter, based on its properties. (read-only)