当前位置： SCI文献检索 > Journal of the American Academy of Audiology期刊下所有文献 > Optimizing the benefit of sound processors coupled to personal FM systems.

Optimizing the benefit of sound processors coupled to personal FM systems.

Abstract：

BACKGROUND:Use of personal frequency modulated (FM) systems significantly improves speech recognition in noise for users of cochlear implants (CI). There are, however, a number of adjustable parameters of the cochlear implant and FM receiver that may affect performance and benefit, and there is limited evidence to guide audiologists in optimizing these parameters. PURPOSE:This study examined the effect of two sound processor audio-mixing ratios (30/70 and 50/50) on speech recognition and functional benefit for adults with CIs using the Advanced Bionics Auria sound processors. RESEARCH DESIGN:Fully-repeated repeated measures experimental design. Each subject participated in every speech-recognition condition in the study, and qualitative data was collected with subject questionnaires. STUDY SAMPLE:Twelve adults using Advanced Bionics Auria sound processors. Participants had greater than 20% correct speech recognition on consonant-nucleus-consonant (CNC) monosyllabic words in quiet and had used their CIs for at least six months. INTERVENTION:Performance was assessed at two audio-mixing ratios (30/70 and 50/50). For the 50/50 mixing ratio, equal emphasis is placed on the signals from the sound processor and the FM system. For the 30/70 mixing ratio, the signal from the microphone of the sound processor is attenuated by 10 dB. DATA COLLECTION AND ANALYSIS:Speech recognition was assessed at two audio-mixing ratios (30/70 and 50/50) in quiet (35 and 50 dB HL) and in noise (+5 signal-to-noise ratio) with and without the personal FM system. After two weeks of using each audio-mixing ratio, the participants completed subjective questionnaires. RESULTS:Study results suggested that use of a personal FM system resulted in significant improvements in speech recognition in quiet at low-presentation levels, speech recognition in noise, and perceived benefit in noise. Use of the 30/70 mixing ratio resulted in significantly poorer speech recognition for low-level speech that was not directed to the FM transmitter. There was no significant difference in speech recognition in noise or functional benefit between the two audio-mixing ratios. CONCLUSIONS:Use of a 50/50 audio-mixing ratio is recommended for optimal performance with an FM system in quiet and noisy listening situations.

journal_name

J Am Acad Audiol

journal_title

Journal of the American Academy of Audiology

authors

Wolfe J,Schafer EC

doi

10.3766/jaaa.19.8.2

subject

Has Abstract

pub_date

2008-09-01 00:00:00

pages

585-94

issue

eissn

1050-0545

issn

2157-3107

journal_volume

pub_type

临床试验,杂志文章

在线工具

Optimizing the benefit of sound processors coupled to personal FM systems.