A two-microphone noise reduction system for cochlear implant users with nearby microphones. Part II: Performance Evaluation

Kompis, Martin; Bertram, Matthias; Senn, Pascal; Müller, Joachim; Pelizzone, Marco; Häusler, Rudolf (2008). A two-microphone noise reduction system for cochlear implant users with nearby microphones. Part II: Performance Evaluation. EURASIP journal on advances in signal processing, 2008(1), p. 451273. New York, N.Y.: Hindawi Pub. Corp. 10.1155/2008/451273

[img]
Preview
Text
1687-6180-2008-451273.pdf - Published Version
Available under License Creative Commons: Attribution (CC-BY).

Download (3MB) | Preview

Users of cochlear implants (auditory aids, which stimulate the auditory nerve electrically at the inner ear) often suffer from poor speech understanding in noise. We evaluate a small (intermicrophone distance 7 mm) and computationally inexpensive adaptive noise reduction system suitable for behind-the-ear cochlear implant speech processors. The system is evaluated in simulated and real, anechoic and reverberant environments. Results from simulations show improvements of 3.4 to 9.3 dB in signal to noise ratio for rooms with realistic reverberation and more than 18 dB under anechoic conditions. Speech understanding in noise is measured in 6 adult cochlear implant users in a reverberant room, showing average improvements of 7.9–9.6 dB, when compared to a single omnidirectional microphone or 1.3–5.6 dB, when compared to a simple directional two-microphone device. Subjective evaluation in a cafeteria at lunchtime shows a preference of the cochlear implant users for the evaluated device in terms of speech understanding and sound quality.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Department of Head Organs and Neurology (DKNS) > Clinic of Ear, Nose and Throat Disorders (ENT)

UniBE Contributor:

Kompis, Martin

ISSN:

1687-6172

Publisher:

Hindawi Pub. Corp.

Language:

English

Submitter:

Factscience Import

Date Deposited:

04 Oct 2013 15:04

Last Modified:

08 Jun 2016 10:46

Publisher DOI:

10.1155/2008/451273

Web of Science ID:

000258065400001

BORIS DOI:

10.7892/boris.27747

URI:

https://boris.unibe.ch/id/eprint/27747 (FactScience: 110688)

Actions (login required)

Edit item Edit item
Provide Feedback