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Semin Hear 2003; 24(1): 071-080
DOI: 10.1055/s-2003-37909
Copyright © 2002 by Thieme Medical Publishers, Inc., 333 Seventh Avenue, New York, NY 10001, USA. Tel.: +1(212) 584-4662

Quantifying Telecoil Performance in the Ear: Common Practices and a New Protocol

Jerry L. Yanz1 , James Pehringer2
  • Vice-President, Education, Micro-Tech Hearing Instruments, Inc., Plymouth, Minnesota
  • 2President/Audiologist, Pehratek Products, Inc., Allied Hearing Services, Minnetonka, Minnesota
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Publication History

Publication Date:
13 March 2003 (online)

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ABSTRACT

Recent survey data presented here indicate that audiologists exhibit no clear pattern of preferred evaluation practices for hearing aids equipped with telecoils. The great majority surveyed rely on informal patient judgments of sound quality rather than on formal probe-microphone or speech-recognition measures. Formal telecoil-fitting protocols are reviewed, but none has gained wide acceptance, perhaps due to the time and equipment demands they present. Protocols that use an induction loop input do not represent the true conditions of telephone use. Formal quantification of telecoil performance in the patient's ear in response to a telephone input is thought to be an important factor in achieving a successful outcome. Modern hearing aids with amplified, programmable telecoils offer the means for increasing telecoil success, but that success depends on optimizing telecoil performance using a standard set of tools that can be applied quickly and consistently in the office. This article presents a practical seven-step protocol for optimizing telecoil performance that includes hearing aid requirements, suggested procedures, and a new, standard inductive signal source to present a known speech or noise signal to the hearing aid during programming of the telecoil memory.

KEYWORDS

Telecoil - quantification - Tel-Phone

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