Effects of Bilateral Automatic Gain Control Synchronization in Cochlear Implants With and Without Head Movements: Sound Source Localization in the Frontal Hemifield.

Journal of Speech, Language, and Hearing Research : JSLHR
M Torben PastoreMichael F Dorman

Abstract

Purpose For bilaterally implanted patients, the automatic gain control (AGC) in both left and right cochlear implant (CI) processors is usually neither linked nor synchronized. At high AGC compression ratios, this lack of coordination between the two processors can distort interaural level differences, the only useful interaural difference cue available to CI patients. This study assessed the improvement, if any, in the utility of interaural level differences for sound source localization in the frontal hemifield when AGCs were synchronized versus independent and when listeners were stationary versus allowed to move their heads. Method Sound source identification of broadband noise stimuli was tested for seven bilateral CI patients using 13 loudspeakers in the frontal hemifield, under conditions where AGCs were linked and unlinked. For half the conditions, patients remained stationary; in the other half, they were encouraged to rotate or reorient their heads within a range of approximately ± 30° during sound presentation. Results In general, those listeners who already localized reasonably well with independent AGCs gained the least from AGC synchronization, perhaps because there was less room for improvement. Those listeners w...Continue Reading

References

Aug 1, 1967·The Journal of the Acoustical Society of America·W R Thurlow, P S Runge
Feb 12, 1998·The Journal of the Acoustical Society of America·S Perrett, W Noble
Dec 19, 1998·The Journal of the Acoustical Society of America·W M HartmannJ B Gaalaas
May 21, 1999·The Journal of the Acoustical Society of America·F L Wightman, D J Kistler
Feb 8, 2002·The Journal of the Acoustical Society of America·Fan-Gang ZengPhil Segel
Mar 7, 2003·Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology·Brian C J Moore
Mar 27, 2003·The Journal of the Acoustical Society of America·Richard J M van Hoesel, Richard S Tyler
Oct 14, 2004·The Journal of the Acoustical Society of America·Bernhard U SeeberHugo Fastl
Feb 6, 2008·The Journal of the Acoustical Society of America·Bernhard U Seeber, Hugo Fastl
Apr 29, 2008·Otolaryngology--head and Neck Surgery : Official Journal of American Academy of Otolaryngology-Head and Neck Surgery·Bradford G Bichey, Richard T Miyamoto
Apr 14, 2009·International Journal of Audiology·Patrick J BoyleBrian C J Moore
Jan 10, 2012·The Journal of the Acoustical Society of America·Ian M Wiggins, Bernhard U Seeber
May 17, 2012·Ear and Hearing·Stefan Kerber, Bernhard U Seeber
Nov 13, 2012·I-Perception·W Owen Brimijoin, Michael A Akeroyd
Feb 1, 2013·The Journal of the Acoustical Society of America·Ian M Wiggins, Bernhard U Seeber
Feb 27, 2013·Journal of the Association for Research in Otolaryngology : JARO·Stefan Kerber, Bernhard U Seeber
Apr 6, 2013·The Journal of the Acoustical Society of America·Andrew H Schwartz, Barbara G Shinn-Cunningham
May 10, 2013·The Journal of the Acoustical Society of America·William A YostChristopher A Brown
May 21, 2013·Cochlear Implants International·Martin F MuellerNorbert Dillier
Sep 18, 2014·Frontiers in Neuroscience·W Owen Brimijoin, Michael A Akeroyd
Nov 7, 2014·The Journal of the Acoustical Society of America·William A Yost, Xuan Zhong
Mar 5, 2016·The Journal of the Acoustical Society of America·Jacques A Grange, John F Culling
May 4, 2017·The Journal of the Acoustical Society of America·Henrik Gert HassagerTorsten Dau
May 26, 2018·Journal of Speech, Language, and Hearing Research : JSLHR·René H GiffordMichael F Dorman
Feb 23, 2019·Trends in Hearing·Wendy B PottsChristopher J Long
May 10, 2019·The Journal of the Acoustical Society of America·Alan W Archer-Boyd, Robert P Carlyon

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.

Related Papers

Journal of Trace Elements in Medicine and Biology : Organ of the Society for Minerals and Trace Elements (GMS)
Ayman Saber MohamedSohair Ramadan Fahmy
© 2021 Meta ULC. All rights reserved