압축비율에 따른 문장인지도와 음질의 비교
Comparisons of the Sentence Recognition Scores and Sound Qualities as a Function of Compression Ratios
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참고문헌
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초록
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.
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.
참고문헌 (29)
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