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KMID : 0361020210640090619
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Korean Journal of Otolaryngology - Head and Neck Surgery
2021 Volume.64 No. 9 p.619 ~ p.625
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Verification of Hearing Aids by Comparing Real Ear Measurements and Word Recognition Scores
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Cheon Tae-Uk
Kim Yeh-Ree
Park Marn-Joon
Kwak Min-Young
Yang Chan-Joo
Yoo Myung-Hoon
Park Hong-Ju
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Abstract
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Background and Objectives In this study, we introduce our method of hearing aid (HA)verification using real ear measurement (REM). We verified HAs that have gone through thefitting program using speech mapping REM; we then compared the outcome with word recognitionscores (WRS) to evaluate functional gain.
Subjects and Method Fifty-six patients of sensorineural hearing loss (81 ears) were enrolledin the study. In REM, if the gap between the target gain of HA and real ear aided response(REAR) was less than 10 dB SPL, fitting was considered successful. In speech audiometry,unaided maximum discrimination score (PB max), unaided WRS at 65 dB HL andaided WRS at 65 dB HL were measured. By comparing PB max and aided WRS at 65 dB HL,patients were sorted into best (n=15), good (n=57), and poorly (n=9) aided groups and analyzedfor the successes of fitting. Fitting was deemed unsuccessful if REAR was ≥10 dB SPLlower than the target value of HA.
Results The mean aided WRS at 65 dB HL of best, good and poorly aided groups were85.6%, 77.3%, and 54.2%, respectively. There were statistically significant differences betweenall groups (p=0.019, 0.001, 0.002). The success rates of HA fitting showed significant differencesat 0.5, 0.75, 1, 4 kHz of 55 dB SPL (p=0.023, 0.005, 0.003, 0.014), and at 4 kHz of 65 and75 dB SPL (p=0.004, 0.001). The high WRS group showed sufficient gain at many frequencies.
Conclusion Well fitted HAs can provide sufficient increase in speech intelligibility. Usingthe speech mapping REM is a great method to verify fitting of HA.
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KEYWORD
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Hearing aids, Hearing loss, Speech discrimination tests
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Listed journal information
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