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Audiol > Volume 11(4); 2015 > Article
Audiology 2015;11(4): 292-301.
Published online: October 31, 2015.
doi: http://dx.doi.org/10.21848/audiol.2015.11.4.292
압축비율에 따른 문장인지도와 음질의 비교
박승영1,2, 이경원1
1한림국제대학원대학교 청각학과
2보청기프로센터
Comparisons of the Sentence Recognition Scores and Sound Qualities as a Function of Compression Ratios
Seung Young Park1,2, Kyoungwon Lee1
1Department of Audiology, Hallym University of Graduate Studies, Seoul, Korea
2Hearing Aids PRO Cenrter, Sungnam, Gyunggido, Korea
Correspondence  Kyoungwon Lee ,Tel: (02) 2051-4951, Fax: (02) 3453-6618, Email: leekw@hallym.ac.kr
Received: July 27, 2015; Revised: October 2, 2015   Accepted: October 5, 2015.  Published online: October 31, 2015.
ABSTRACT
The purpose of the present study was to investigate how the sentence recognition scores (SRSs) in noise are changed as a function of the compression ratios (CRs) and what CR is preferred by the individual listeners in terms of sound quality when speech is presented in quiet. Participants consisted of 31 individuals with sensorineural hearing loss ranging in age from 65 to 85 years (mean = 77.0 years) and divided by two groups according to their hearing aids; hearing aid used or non-used. Korean Standard Sentences mixed with white noise of +6 and 0 dB signal-to-noise ratios (SNR) and varied 1:1, 2:1, and 3:1 CR with attack time of 2 msec and release time of 5 msec were presented in most comfortable level. Results showed that SRSs were significant for the SNRs, but the other variables did not differ significantly on the SRS and sound quality including CR. However, analysis of individual participant data, highest SRS and most preferred sound quality was observed in 2:1 CR. Conclusively, this results may help to determine of compression ratio of non-linear hearing aid for Korean hearing impaired.
Key Words: Hearing aid, Compression ratio, Compression threshold, Sentence recognition score, Sound quality, Sensorineural hearing loss, Signal-to-noise ratio
중심단어: 보청기, 압출비율, 압축역치, 문장인지도, 음질, 감각신경성난청, 신호대잡음비
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