Effect of companding on speech recognition in quiet and noise for listeners with ANSD.
Int J Audiol
; 53(2): 94-100, 2014 Feb.
Article
em En
| MEDLINE
| ID: mdl-24237041
ABSTRACT
OBJECTIVE:
The present study assesses the effect of companding on speech perception in quiet and noise for listeners with auditory neuropathy spectrum disorder (ANSD).DESIGN:
Speech perception was assessed using speech reception threshold in noise (SRTn) for sentences and consonant identification in quiet and at different signal-to-noise ratios (15, 10, 5, and 0 dB SNR). STUDY SAMPLE Ten ANSD listeners and normal-hearing listeners participated in the study.RESULTS:
ANSD listeners required significantly higher SRTn when compared to the normal-hearing listeners. Companding reduced SRTn more significantly in listeners with ANSD, but for normal-hearing listeners there was only a marginal reduction. In the consonant identification task, ANSD listeners performed poorer than normal-hearing listeners in quiet and noise. Companding improved consonant identification in quiet and at 15 dB SNR for listeners with ANSD, whereas no improvement was observed in normal-hearing listeners.CONCLUSION:
Results of the present study demonstrate that companding improved speech perception in quiet and noise for ANSD listeners. The amount of improvement is higher at higher SNRs. In normal-hearing listeners, companding showed marginal improvement in both quiet and noise. The findings are discussed for rehabilitation of ANSD listeners by hearing aids which incorporate the companding strategy.
Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Mascaramento Perceptivo
/
Correção de Deficiência Auditiva
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Percepção da Fala
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Pessoas com Deficiência Auditiva
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Reconhecimento Psicológico
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Perda Auditiva Central
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Ruído
Idioma:
En
Ano de publicação:
2014
Tipo de documento:
Article