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Multirate Audiometric Filter Bank for Hearing Aid Devices

Authors
  • Sokolova, Alice1, 2
  • Sengupta, Dhiman1
  • Chen, Kuan-Lin1
  • Gupta, Rajesh1
  • Aksanli, Baris2
  • Harris, Fredric1
  • Garudadri, Harinath1
  • 1 , La Jolla, CA, USA
  • 2 , San Diego, CA, USA
Type
Published Article
Journal
Conference record. Asilomar Conference on Signals, Systems & Computers
Publication Date
Jan 01, 2021
Volume
2021
Pages
1436–1442
Identifiers
DOI: 10.1109/IEEECONF53345.2021.9723257
PMID: 35368329
PMCID: PMC8973212
Source
PubMed Central
Keywords
Disciplines
  • Article
License
Unknown

Abstract

The frequency-dependent nature of hearing loss poses many challenges for hearing aid design. In order to compensate for a hearing aid user’s unique hearing loss pattern, an input signal often needs to be separated into frequency bands, or channels, through a process called sub-band decomposition. In this paper, we present a real-time filter bank for hearing aids. Our filter bank features 10 channels uniformly distributed on the logarithmic scale, located at the standard audiometric frequencies used for the characterization and fitting of hearing aids. We obtained filters with very narrow passbands in the lower frequencies by employing multi-rate signal processing. Our filter bank offers a 9.1× reduction in complexity as compared to conventional signal processing. We implemented our filter bank on Open Speech Platform, an open-source hearing aid, and confirmed real-time operation.

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