ARTICULOS

Auditory Nerve Model ... limits of normal and impaired

publicado a la‎(s)‎ 31 may. 2012 15:36 por Raúl H. Sánchez

Auditory nerve model for predicting performance limits of normal and impaired listeners

ARLO Volume 2, Issue 3, pp. 91-96 (June 2001); (6 pages)

Michael G. Heinz1,2, Xuedong Zhang3, Ian C. Bruce4, and Laurel H. Carney3
1Speech and Hearing Sciences Program, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
2Hearing Research Center, Boston University, Boston, Massachusetts 02215
3Hearing Research Center and Biomedical Engineering, Boston University, Boston, Massachusetts 02215
4Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland 21205

Abstract

A computational auditory nerve (AN) model was developed for use in modeling psychophysical experiments with normal and impaired human listeners. In this phenomenological model, many physiologically vulnerable response properties associated with the cochlear amplifier are represented by a single nonlinear control mechanism, including the effects of level-dependent tuning, compression, level-dependent phase, suppression, and fast nonlinear dynamics on the responses of high, medium, and low spontaneous-rate (SR) AN fibers. Several model versions are described that can be used to evaluate the relative effects of these nonlinear properties. © 2001 Acoustical Society of America.

VER            COMPUTATIONAL MODEL (MODEL DB)      

Recipes for Verification Success

publicado a la‎(s)‎ 20 mar. 2012 5:29 por Raúl H. Sánchez

Recipes for Verification Success

by Tammara Stender, AuD, and Astrid Haastrup, MA

A step-by-step how-to guide to real-ear verification—and optimizing its benefits


While it is generally accepted that real-ear verification contributes to successful fittings, often the precise steps to obtaining these measurements are not discussed in detail. Further complicating verification procedures are the everchanging aspects of hearing aid features and real-ear equipment. The following includes step-by-step verification "'recipes" to promote a more streamlined, systematic fitting process. Further, verification of audibility and hearing aid features becomes even more beneficial when the patient is involved. Communicating results helps increase patient confidence in the professional services received and in the hearing aid technology itself.


PDF  ENLACE

Future of Hearing Aids

publicado a la‎(s)‎ 11 ene. 2012 2:46 por Raúl H. Sánchez

Future of Hearing Aids

Brent Edwards, Ph.D.
Executive Director, Starkey Hearing Research Center

ABSTRACT
Hearing aids have advanced significantly over the past decade, primarily due to the maturing of digital technology. The next decade should see an even greater number of innovations to hearing aid technology, and this paper attempts to predict in which areas
the new developments will occur. Both incremental and radical innovations in digital hearing aids will be driven by advances in the following areas: (i) wireless technology, (ii) digital chip technology, (iii) hearing science, and (iv) cognition. The opportunities and limitations for each of these areas will be discussed. Additionally, emerging trends such as connectivity and individualization will also drive new technology and these are discussed within the context on the areas given above.

Wave-interference patterns on the basilar membrane:

publicado a la‎(s)‎ 18 nov. 2011 15:55 por Raúl H. Sánchez

Shera CA, Cooper NP. Wave-interference patterns on the basilar membrane: Testing models of OAE propagation. Assoc. Res. Otolaryngol. Abs. 2009;32:56.

Measurements of basilar-membrane (BM) mechanical transfer functions in healthy ears manifest a striking, quasiperiodic rippling pattern at low stimulus levels (e.g., Rhode 2007; see Figure 1 at right). The low-level ripples are evident in both the magnitude and the phase (see * in Figure 1) and are most prominent below the measurement site’s characteristic frequency (CF).

A second rippling pattern, different from that explored here, is observed at much higher stimulus levels and at frequencies above CF (see the lower right-hand corner of each panel in Figure 1). This high-level rippling pattern is thought to arise from interference between BM responses to slow and fast pressure waves (Olson 1998, Rhode 2007).

This poster addresses two fundamental questions about the low-level BM ripples:




Póster de Elvira Pérez et al. en ISSAR 2011

publicado a la‎(s)‎ 29 ago. 2011 14:37 por Raúl H. Sánchez

The relationship between temporal and spectral processing of sound and selfreported
hearing difficulty in older adults with sensori-neural hearing loss

ELVIRA PEREZ, ABBY MCCORMACK AND BARRIE A. EDMONDS

National Biomedical Research Unit in Hearing, University of Nottingham,
Ropewalk House, 113 The Ropewalk, Nottingham, NG1 5DU, UK

Impairments to the temporal and spectral processing of sound contribute to difficulties in understanding speech, and likely contribute to the large variability in hearing aid outcomes of older adults with sensori-neural hearing loss (SNHL). We measured sensitivity to temporal fine structure (TFS), gap detection thresholds, and masked thresholds for frequency resolution in 80 older adults with bilateral symmetrical SNHL. Performance on the three psychoacoustic tests was not strongly correlated, and estimates of temporal and frequency resolution were not associated with patient self reports of hearing difficulty. However, listeners with good sensitivity to TFS were found to experience significantly greater confidence in their abilities on the spatial hearing and sound quality self-report scenarios than those listeners with poor sensitivity to TFS. These results indicate that the structures and mechanisms underlying temporal and spectral processing are independent, and that sensitivity to TFS is likely to contribute to a patient’s experience of their hearing difficulties.

PD: Muchas Gracias Elvira


Agregación familiar de la pérdida auditiva relacionada con la edad en un estudio epidemiológico en adultos mayores

publicado a la‎(s)‎ 28 jun. 2011 3:29 por Raúl H. Sánchez

Titulo: Agregación familiar de la pérdida auditiva relacionada con la edad en un estudio epidemiológico en adultos mayores

Laura A. Raynor
James S. Pankow
Michael B. Miller
Universidad de Minnesota, Mineápolis

Guan-Hua Huang
Universidad Nacional Chiao Tung, Hsinchu, Taiwán

Dayna Dalton
Ronald Klein
Barbara E. K. Klein
Karen J. Cruickshanks
Universidad de Wisconsin—Madison


El articulo ha sido recogido el boletín de Audiologia de Clave que se edita bimensualmente y contiene 2 artículos, en este boletin tambien encontramos el articulo:

Posturografía dinámica computerizada modificada con agitación cefálica

Julie A. Honaker
Universidad de Nebraska-Lincoln

Connie M. Converse
U.S. Air Force Audiology, Lackland Air Force Base, San Antonio, TX

Neil T. Shepard
Clínica Mayo, Rochester, MN



NAL-NL2: Presentación sobre el desarrollo

publicado a la‎(s)‎ 14 jun. 2011 13:40 por Raúl H. Sánchez

Presentación realizada por el HEARing CRC sobre el desarrollo llevado a cabo en el The National Acoustic Laboratories (NAL).
Esta nueva versión del NAL estará pronto incluida en la mayoría de Softwares de Adaptación, siendo los primeros den implantarlos la empresa COSELGI y su nueva linea de audífonos, seguidos de Oticon.

El conocimiento de los 'porqués' de este nuevo metodo de adaptación puede ayudarnos a proveer a nuestros pacientes de una mejor audición.

Variations in “adequate” own-voice level

publicado a la‎(s)‎ 6 jun. 2011 23:01 por Raúl H. Sánchez   [ actualizado el 6 jun. 2011 23:06 ]

Variations in “adequate” own-voice level used by speakers and preferred by listeners when communicating across a distance

Søren Laugesen, Niels Søgaard Jensen, Patrick Maas, and Claus Nielsen

Eriksholm, Oticon Research Centre, Kongevejen 243, DK-3070 Snekkersten, Denmark

A computational algorithm for computing cochlear frequency selectivity: Further studies

publicado a la‎(s)‎ 26 may. 2011 10:42 por Raúl H. Sánchez   [ actualizado el 26 may. 2011 10:44 ]

Autores: Alberto Lopez-Najera, Ray Meddis, and Enrique A. Lopez-Poveda

Universidad de Castilla-La Mancha, {enrique.lopezpoveda, alberto.lopez}@uclm.es
University of Essex, rmeddis@essex.ac.uk
Corresponding author, presently at Universidad de Salamanca, ealopezpoveda@usal.es

EuroTrak I

publicado a la‎(s)‎ 10 mar. 2011 15:22 por Raúl H. Sánchez   [ actualizado el 10 mar. 2011 15:34 ]

EuroTrak I: A Consumer Survey About Hearing Aids in Germany, France, and the UK

by Søren Hougaard and Stefan Ruf

Hearing Review. 2011;18(2):12-28.

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