Archives of Acoustics, 40, 1, pp. 51–58, 2015

Speech Intelligibility in Rooms with and without an Induction Loop for Hearing Aid Users

Institute of Acoustics, Faculty of Physics, Adam Mickiewicz University in Poznań, Umultowska 85, 61-614 Poznań

Adam Mickiewicz University in Poznań

The paper presents the results of sentence and logatome speech intelligibility measured in rooms with induction loop for hearing aid users. Two rooms with different acoustic parameters were chosen. Twenty two subjects with mild, moderate and severe hearing impairment using hearing aids took part in the experiment. The intelligibility tests composed of sentences or logatomes were presented to the subjects at fixed measurement points of an enclosure. It was shown that a sentence test is more useful tool for speech intelligibility measurements in a room than logatome test. It was also shown that induction loop is very efficient system at improving speech intelligibility. Additionally, the questionnaire data showed that induction loop, apart from improving speech intelligibility, increased a subject’s general satisfaction with speech perception.
Keywords: speech intelligibility, induction loop, hearing impairment, speech enhancement.
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Brachmanski and Staroniewicz, P., 1999. Phonetic structure of a test material used in subjective measurements of speech quality (in Polish), (Eds.), Speech and Language Technology, Poznan, pp. 71-80.

Brachmański, S., 2004. Estimation of logatom intelligibility with the STI method for polish speech transmitted via communication channels. Archives of Acoustics. 29(4), 555-562.

Brachmański, S., 2008. Objective measure for assessment of speech quality in Rooms. Archives of Acoustics. 33(4(s)), 177-182.

Cox, R. M. and Alexander, G. C., 1995. The abbreviated profile of hearing aid benefit. Ear and Hearing. 16, 176-186.

Cox, R. M. and Gilmore, C., 1990. Development of the profile of hearing aid performance. Journal of Speech and Hearing Research. 33, 343-357.

Curtis Tannahill, J., 1983. Performance Characteristics for Hearing Aid Microphone Versus Telephone and Telephone/Telecoil Reception Modes. J Speech Hear Res. 26, 195-201.

George, E., S., G., J., F. and T., H., 2010. Measuring the Effects of Reverberation and Noise on Sentence Intelligibility for Hearing-Impaired Listeners. Journal of Speech, Language, and Hearing Research. 53, 1429–1439.

George, E. L., Goverts , S. T., Festen, J. M. and Houtgast, T., 2010. Measuring the effects of reverberation and noise on sentence intelligibility for hearing-impaired listeners. J Speech Lang Hear Res. 53(6), 1429-39.

Helfer, K. S. and Wilber, L. A., 1990. Hearing loss, aging, and speech perception in reverberation and noise. Journal of Speech, Language, and Hearing Research. 33(1), 149-155.

Hinman, R. T., Lupton, E. C., Leeb, S. B., Avestruz, A.-T., Gilmore, R., Paul, D. and Peterson, N., 2003. Using Talking Lights Illumination-Based Communication Networks to Enhance Word Comprehension by People Who Are Deaf or Hard of Hearing. American Journal of Audiology. 12, 17-22.

Houtgast, T., Steeneken, H. J. M. and Plomp, R., 1980. Predicting speech intelligibility in rooms from the modulation transfer function. I. General room acoustics. Acustica. 46, 60-72.

Nabelek, A. K. and Mason, D., 1981. Effects of noise and reverberation on binaural and monaural word identification by subjects with various audiograms. Journal of Speech and Hearing Research. 24, 375–383.

Noe, C. M., Davidson, S. A. and Mishler, P. J., 1997. The Use of Large Group Assistive Listening Devices With and Without Hearing Aids in an Adult Classroom Setting. Am J Audiol. 6, 48-63.

Ozimek, E., Kutzner, D., Libiszewski, P., Warzybok, A. and Kocinski, J., 2009a. The new polish tests for speech intelligibility measurements. 13th IEEE SPA, Signal Processing: Algorithms, Architectures, Arrangements, and Applications. Poznań.

Ozimek, E., Kutzner, D., Sek, A. and Wicher, A., 2009b. Development and evaluation of Polish digit triplet test for auditory screening. Speech Communication. 51(4), 307-316.

Ozimek, E., Kutzner, D., Sęk, A. and Wicher, A., 2009c. Polish sentence tests for measuring the intelligibility of speech in interfering noise. International Journal of Audiology. 48(7), 433-443.

Plomp, R. and Duquesnoy, A. J., 1980. Room acoustics for the aged. J. Acoust. Soc. Am. 68, 1616-1621.

Plomp, R. and Mimpen, A. M., 1979. Improving the reliability of testing the speech reception threshold for sentences. Audiol. 18, 43-53.

Rodriguez, G. P., Holmes, A. E., DiSarno, N. J. and Kaplan, H., 1993. Preferred Hearing Aid Response Characteristics Under Acoustic and Telecoil Coupling Conditions. Am J Audiol. 2, 55-59.

Ross, M., 2006. Telecoils are about more than telephones. Hearing Journal. 59(5), 24-28.

Sandrock, C. and Schum, D. J., 2007. Wireless transmission of speech and data to, from, and between hearing aids. Hearing Journal. 60(11), 12-16.

Steeneken, H. J. M. and Houtgast, T., 1980. A physical method for measuring speech-transmission quality. Journal of the Acoustical Society of America. 69, 318-326.

Sung, R. J. and Hodgson, W. R., 1971. Performance of Individual Hearing Aids Utilizing Microphone and Induction Coil Input. J Speech Hear Res. 14, 365-371.

Van Tasell, D. and Landin, D. P., 1980. Frequency Response Characteristics of FM Mini-Loop Auditory Trainers. J Speech Hear Disord. 45, 247-258.

Vargo, S. W., Taylor, G., Curtis Tannahill, J. and Plummer, S. A., 1970. The Intelligibility of Speech by Hearing Aids on Inductance Loop and Microphone Modes of Signal Reception. J Speech Hear Res. 13, 87-91.

DOI: 10.1515/aoa-2015-0007

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