Speech recognition models can derive subband and modulation power from 22 gammatone filters

Evidence

Although gammatone filters provide a good approximation of the human auditory filters, they suffer from a few shortcomings. They cannot emulate the level-dependent characteristics of the auditory filters. In addition, the impulse response of a gammatone filter has a relatively slow onset, which brings on problems when modelling phenomena involving temporally short sounds, such as the precedence effect. — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 1614 (#complicates, via linked claim)

Categorization

• XREF: connects to: Gammatone filters fail on level-dependence and fast-onset sounds — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 1614; The envelope of each auditory filter output is processed by a modulation filterbank; Auditory filter bandwidth scales nonlinearly with center frequency (+1 more)

Related

• Gammatone filters match the auditory nerve’s measured impulse response (similarity 0.93)
• Gammatone filters fail on level-dependence and fast-onset sounds (similarity 0.90)
• Gammatone filter banks model human auditory filtering using measured nerve responses (similarity 0.89)
• Speech perception models decompose subband signals into acoustic and modulation envelopes (similarity 0.88)
• A model of consonant perception extracts modulation power from gammatone-filtered speech envelopes. (similarity 0.88)
• DRNL filter outputs smear temporal fine structure into double impulses (similarity 0.84)
• Modulation power is captured by filters tuned to 2, 4, 8, and 16 Hz (similarity 0.83)
• Auditory filter bandwidth scales nonlinearly with center frequency (similarity 0.80)
• Filter banks split broadband signals into sub-bands much like cochlear hearing does (similarity 0.80)
• Filtering in the frequency domain is simply multiplicative on spectra (similarity 0.79)
• The envelope of each auditory filter output is processed by a modulation filterbank (similarity 0.79)
• The auditory system acts as a band-pass filter at each signal frequency. (similarity 0.78)
• Frequency-modulation detection relies on the steep lower excitation slope at 27 dB per Bark (similarity 0.78)
• Auditory filters respond asymmetrically, favoring frequencies below center (similarity 0.78)

Broader Connections

• Gammatone filters match the auditory nerve’s measured impulse response #corroborates (0.90)
• The envelope of each auditory filter output is processed by a modulation filterbank #expands (0.82)
• Gammatone filters fail on level-dependence and fast-onset sounds #complicates (0.78) — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 1614
• Auditory filter bandwidth scales nonlinearly with center frequency #expands (0.72)