Cochlear implants stimulate each cochlear place with calibrated pulses matched to ERB filter bands.
Evidence
The key feature to note about the hearing modeling spectrogram is that the sound is analyzed via a bank of filters that model the auditory filters in terms of their shape and bandwidth. As a result, the frequency axis is based on the ERB (equivalent rectangular bandwidth) scale itself, since the output from each filter is plotted with an equal distance on the frequency axis of the spectrogram. — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1501 (
#exemplifies, via linked claim)
A filter bank is a set of band-pass filters that is fed the same input, where the centre frequencies of the filters vary over desired ranges of frequencies. It thus separates a broadband input signal into multiple time-domain narrowband signals, which are called sub-bands. This is similar to the functioning of hearing, as will be discussed later in Chapter 7. — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 396 (
#expands, via linked claim)
Categorization
- XREF: connects to: An auditory spectrum maps cochlear excitation level against ERB-scaled frequency; Spectro-temporal SNR units span 23 ms and one ERB bandwidth; Filter banks split broadband signals into sub-bands much like cochlear hearing does — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 396 (+2 more)
Broader Connections
- Hearing-modeling spectrograms use an ERB frequency axis from modeled auditory filters.
#exemplifies(0.82) — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1501 - Filter banks split broadband signals into sub-bands much like cochlear hearing does
#expands(0.80) — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 396 - The auditory system acts as a band-pass filter at each signal frequency.
#expands(0.80)