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Benefit From Directional Microphone Hearing Aids: Objective and Subjective Evaluations.

Park HS, Moon IJ, Jin SH, Choi JE, Cho YS, Hong SH - Clin Exp Otorhinolaryngol (2015)

Bottom Line: Correlation analysis of factors influencing DIR benefit was accomplished.Any individual factors did not significantly affect subjective and objective DIR benefits.Factors influencing individual variation in perceptual DIR benefit were still hard to explain.

View Article: PubMed Central - PubMed

Affiliation: Hearing Research Laboratory, Samsung Medical Center, Seoul, Korea.

ABSTRACT

Objectives: The aims of this study were to find and compare the effect of directional (DIR) processing of two different hearing aids via both subjective and objective methods, to determine the association between the results of the subjective and objective evaluations, and to find out individual predictive factors influencing the DIR benefit.

Methods: Twenty-six hearing aid users fitted unilaterally with each two different experimental hearing aid performed modified Korean Hearing in Noise Test (K-HINT) in three DIR conditions; omnidirectional (OMNI) mode, OMNI plus noise reduction feature, fixed DIR mode. In order to determine benefits from DIR benefit within a hearing aid and compare performance of the DIR processing between hearing aids, a subjective questionnaire was administrated on speech quality (SQ) and discomfort in noise (DN) domain. Correlation analysis of factors influencing DIR benefit was accomplished.

Results: Benefits from switching OMNI mode to DIR mode within both hearing aids in K-HINT were about 2.8 (standard deviation, 3.5) and 2.1 dB SNR (signal to ratio; SD, 2.5), but significant difference in K-HINT results between OMNI and OMNI plus noise reduction algorithm was not shown. The subjective evaluation resulted in the better SQ and DN scores in DIR mode than those in OMNI mode. However, the difference of scores on both SQ and DN between the two hearing aids with DIR mode was not statistically significant. Any individual factors did not significantly affect subjective and objective DIR benefits.

Conclusion: DIR benefit was found not only in the objective measurement performed in the laboratory but also in the subjective questionnaires, but the subjective results was failed to have significant correlation with the DIR benefit obtained in the K-HINT. Factors influencing individual variation in perceptual DIR benefit were still hard to explain.

No MeSH data available.


Related in: MedlinePlus

Mean hearing thresholds for a test ear in unaided and aided condition, as a function of the given frequencies. The blue circles show unaided responses. The yellow circles and inverted green triangles describe A and B aided response. Error bars indicate ±1 SD about the mean across subjects. HL, hearing loss.
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Figure 1: Mean hearing thresholds for a test ear in unaided and aided condition, as a function of the given frequencies. The blue circles show unaided responses. The yellow circles and inverted green triangles describe A and B aided response. Error bars indicate ±1 SD about the mean across subjects. HL, hearing loss.

Mentions: Twenty-six hearing impaired listeners (10 males, 16 females) with sensorineural HL participated in this study, and they have used monaural or binaural hearing aids. The mean age was 45.2 years (SD, 18.3) ranged from 21 to 76 years. This study was approved by the Institutional Review Board of Samsung Medical Center (IRB No. SMC 2013-07-076), and each participant signed the written consent form after a full explanation for the study. All the experimental tests were administered at hearing research laboratory in tertiary hospital. The mean hearing thresholds at frequencies (0.5-8 kHz) for a test ear were plotted in Fig. 1. Pure tone average (PTA) across 0.5, 1, 2, and 4 kHz and WRS were 56.4 dB HL (SD, 7.0) and 72.6% (SD, 9.4%), respectively. Demographic information of the 26 hearing aid users is described in Table 1. Pure tone audiometry was conducted using a clinical audiometer (Orbiter922, GN Otometrics, Denmark) equipped with a headphone (TDH39, Telephonics, Farmingdale, NY, USA).


Benefit From Directional Microphone Hearing Aids: Objective and Subjective Evaluations.

Park HS, Moon IJ, Jin SH, Choi JE, Cho YS, Hong SH - Clin Exp Otorhinolaryngol (2015)

Mean hearing thresholds for a test ear in unaided and aided condition, as a function of the given frequencies. The blue circles show unaided responses. The yellow circles and inverted green triangles describe A and B aided response. Error bars indicate ±1 SD about the mean across subjects. HL, hearing loss.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4553354&req=5

Figure 1: Mean hearing thresholds for a test ear in unaided and aided condition, as a function of the given frequencies. The blue circles show unaided responses. The yellow circles and inverted green triangles describe A and B aided response. Error bars indicate ±1 SD about the mean across subjects. HL, hearing loss.
Mentions: Twenty-six hearing impaired listeners (10 males, 16 females) with sensorineural HL participated in this study, and they have used monaural or binaural hearing aids. The mean age was 45.2 years (SD, 18.3) ranged from 21 to 76 years. This study was approved by the Institutional Review Board of Samsung Medical Center (IRB No. SMC 2013-07-076), and each participant signed the written consent form after a full explanation for the study. All the experimental tests were administered at hearing research laboratory in tertiary hospital. The mean hearing thresholds at frequencies (0.5-8 kHz) for a test ear were plotted in Fig. 1. Pure tone average (PTA) across 0.5, 1, 2, and 4 kHz and WRS were 56.4 dB HL (SD, 7.0) and 72.6% (SD, 9.4%), respectively. Demographic information of the 26 hearing aid users is described in Table 1. Pure tone audiometry was conducted using a clinical audiometer (Orbiter922, GN Otometrics, Denmark) equipped with a headphone (TDH39, Telephonics, Farmingdale, NY, USA).

Bottom Line: Correlation analysis of factors influencing DIR benefit was accomplished.Any individual factors did not significantly affect subjective and objective DIR benefits.Factors influencing individual variation in perceptual DIR benefit were still hard to explain.

View Article: PubMed Central - PubMed

Affiliation: Hearing Research Laboratory, Samsung Medical Center, Seoul, Korea.

ABSTRACT

Objectives: The aims of this study were to find and compare the effect of directional (DIR) processing of two different hearing aids via both subjective and objective methods, to determine the association between the results of the subjective and objective evaluations, and to find out individual predictive factors influencing the DIR benefit.

Methods: Twenty-six hearing aid users fitted unilaterally with each two different experimental hearing aid performed modified Korean Hearing in Noise Test (K-HINT) in three DIR conditions; omnidirectional (OMNI) mode, OMNI plus noise reduction feature, fixed DIR mode. In order to determine benefits from DIR benefit within a hearing aid and compare performance of the DIR processing between hearing aids, a subjective questionnaire was administrated on speech quality (SQ) and discomfort in noise (DN) domain. Correlation analysis of factors influencing DIR benefit was accomplished.

Results: Benefits from switching OMNI mode to DIR mode within both hearing aids in K-HINT were about 2.8 (standard deviation, 3.5) and 2.1 dB SNR (signal to ratio; SD, 2.5), but significant difference in K-HINT results between OMNI and OMNI plus noise reduction algorithm was not shown. The subjective evaluation resulted in the better SQ and DN scores in DIR mode than those in OMNI mode. However, the difference of scores on both SQ and DN between the two hearing aids with DIR mode was not statistically significant. Any individual factors did not significantly affect subjective and objective DIR benefits.

Conclusion: DIR benefit was found not only in the objective measurement performed in the laboratory but also in the subjective questionnaires, but the subjective results was failed to have significant correlation with the DIR benefit obtained in the K-HINT. Factors influencing individual variation in perceptual DIR benefit were still hard to explain.

No MeSH data available.


Related in: MedlinePlus