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DOI: 10.1055/s-2002-24977
Improved Understanding of Speech in Noise: Microphones and Signal Processing
Publikationsverlauf
Publikationsdatum:
11. April 2002 (online)
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ABSTRACT
Inexperienced and experienced users of hearing aids often report a strong desire for their hearing aids to provide significantly better understanding of speech when communicating in noisy situations. This article will summarize several technologies that have significantly improved the understanding of speech in noise. This article provides a short review of recent research reporting that many of the current hearing aids with digital signal processing (DSP) have not significantly improved the understanding of speech in noise relative to analog signal processing. On the other hand, the findings have shown that DSP is often preferred when compared with hearing aids with analog signal processing. Discrepancies between the objective and subjective findings will be discussed.
KEYWORD
Analog signal processing - assistive listening devices - D-Mic - digital signal processing - directional - dual-microphones - Hawthorne effect - multi-microphone array - omnidirectional - signal-to-noise ratio
REFERENCES
- 1 Kochkin S. MarkeTrak III identifies key factors in determining customer satisfaction. The Hearing Journal . 1993; 46(8) 39-44
- 2 Kochkin S. MarkeTrak III: why 20 million in U.S don't use hearing aids for their hearing loss. The Hearing Journal . 1994; 46(1) 20-37
- 3 Killion M C. The SIN report: circuits haven't solved the hearing-in-noise problem. The Hearing Journal . 1997; 50(10) 28-32
- 4 Killion M C. SNR loss: I can hear what people say, but I can't understand them. Hear Rev . 1997; 4(12) 8-14
- 5 Killion M C. Hearing aids: past, present, future. Moving toward normal conversation in noise. Br J Audiol . 1997; 31 141-148
- 6 Roberts M, Schulein R. Measurement and intelligibility optimization of directional microphones for the use in hearing aid devices. Presented at the 103rd meeting of the Audio Engineering Society, New York, NY, 1997
- 7 Kochkin S. MarkeTrak V: ``why my hearing aids are in a drawer''. <~>The consumers perspective. The Hearing Journal . 2000; 53(2) 34-42
- 8 Arlinger S, Billermark E. One-year follow-up of users of a digital hearing aid. Br J Audiol . 1999; 33 223-232
- 9 Bille M, Jensen A, Kjarbol E. Clinical study of a digital versus an analogue hearing aid. Scan Audiol . 1999; 28 127-135
- 10 Boymans M, Dreschler W, Schoneveld P, Verschure H. Clinical evaluation of a full-digital in-the-ear hearing instrument. Audiology . 1999; 38 99-108
- 11 Kuk F, Kollofski C, Brown S, Melum A, Rosenthal A. Use of digital hearing aid with directional microphones in school-aged children. J Am Acad Audiol . 1999; 10 535-548
- 12 Knebel S, Bentler R. Comparison of two digital hearing aids. Ear Hear . 1998; 19(4) 280-289
- 13 Newman C, Sandridge S. Benefit from, satisfaction with, and cost effectiveness of three different hearing aid technologies. Am J Audiol . 1998; 7(2) 115-128
- 14 Ricketts T. Impact of noise source configuration on directional hearing aid benefit and performance. Ear Hear . 2000; 21 194-205
- 15 Ricketts T, Dhar S. Comparison of performance across three directional hearing aids. J Am Acad Audiol . 1999; 10 180-189
- 16 Valente M, Fabry D, Potts L, Sandlin R. Comparing the performance of the Widex Senso digital hearing aids with analog hearing aids. J Am Acad Audiol . 1998; 9 342-360
- 17 Valente M, Sweetow R, Potts L, Bingea B. Digital versus analog signal processing: effect of directional microphone. J Am Acad Audiol . 1999; 10 133-150
- 18 Preves D A. Directional microphone use in ITE hearing instruments. Hear Rev . 1997; 4(7) 21-27
- 19 Frank T, Gooden R G. The effect of hearing aid microphone types on speech discrimination scores in a background of multi-talker noise. Maico Audiologic Library Series . 1973; 11(5) 1-4
- 20 Hawkins D B, Yacullo W S. Signal-to-noise ratio advantage of binaural hearing aids and directional microphones under different levels of reverberation. Journal of Speech and Hearing Disabilities . 1984; 49 278-286
- 21 Lentz W E. Speech discrimination in the presence of background noise using a hearing aid with a directionally-sensitive microphone. Maico Audiologic Library Series . 1972; 10(9) 1-4
- 22 Madison T K, Hawkins D B. The signal-to-noise ratio advantage of directional microphones. Hearing Instruments . 1983; 34(2) 18-49
- 23 Mueller H G, Grimes A M, Erdman S A. Subjective ratings of directional amplification. Hearing Instruments . 1983; 34(2) 14-48
- 24 Nielsen H B. A comparison between hearing aids with a directional microphone and hearing aids with conventional microphone. Scand Audiol . 1973; 2 45-48
- 25 Sung G S, Sung R J, Angelelli R M. Directional microphones in hearing aids. Effects on speech discrimination in noise. Arch Otolaryngol . 1975; 101 316-319
- 26 Valente M. Use of microphone technology to improve user performance in noise. Trends Amp . 1999; 4(3) 112-135
- 27 Edwards B, Struck C, Dharan P, Hou Z. Signal-processing algorithms for a new software-based, digital hearing device. The Hearing Journal . 1998; 51(8) 38-49
- 28 Agnew J, Block M. HINT thresholds for a dual-microphone BTE. Hear Rev . 1997; 4(9) 26-30
- 29 Gravel J S, Fausel N, Liskow C, Chobot J. Children's speech recognition in noise using omnidirectional and dual-microphone hearing aid technology. Ear Hear . 1999; 20 1-11
- 30 Kochkin S. Customer satisfaction and subjective benefit with high performance hearing aids. Hear Rev . 1996; 3(12) 16-26
- 31 Lurquin P, Rafhay S. Intelligibility in noise using multi-microphone hearing aids. Acta Otorhinolaryngol Belg . 1996; 50 103-109
- 32 May A. Multi-microphone instruments, DSP and hearing-in-noise. Hear Rev . 1998; 5(7) 42-45
- 33 Preves D A, Sammeth C A, Wynne M K. Field trial evaluations of a switched directional/omnidirectional ITE hearing instrument. J Am Acad Audiol . 1999; 10 273-284
- 34 Pumford J, Seewald R, Scollie S, Jenstad L. Speech recognition with in-the-ear and behind-the-ear dual-microphone hearing instruments. J Am Acad Audiol . 2000; 11 23-35
- 35 Valente M, Fabry D, Potts L G. Recognition of speech in noise with hearing aids using dual microphones. J Am Acad Audiol . 1995; 6 440-449
- 36 Valente M, Schuchman G, Potts L, Beck L. Performance of dual-microphone in-the-ear hearing aids. J Am Acad Audiol . 2000; 11 181-189
- 37 Voss T. Clinical evaluation of multi-microphone hearing instruments. Hear Rev . 1997; 4(9) 36-74
- 38 Bilsen F A, Soede W, Berkhout A J. Development and assessment of two fixed array microphones for use in hearing aids. J Rehabil Res Dev . 1993; 30(1) 73-81
- 39 Greenberg J E, Zurek P M. Evaluation of an adaptive beamforming method for hearing aids. J Acoust Soc Am . 1992; 91 1662-1676
- 40 Kates J M, Weiss M R. A comparison of hearing aid array processing techniques. J Acoust Soc Am . 1996; 99 3138-3148
- 41 Peterson P M, Durlach N I, Rabinowitz W M, Zurek P M. Multimicrophone adaptive beamforming for interference reduction in hearing aids. J Rehabil Res Dev . 1987; 24(4) 103-110
- 42 Peterson P M, Wei S M, Rabinowitz W M, Zurek P M. Robustness of an adaptive beamforming method for hearing aids. Acta Otolaryngol . 1990; 469 85-90
- 43 Schwander T M, Levitt H. Effect of two-microphone noise reduction on speech recognition by normal-hearing listeners. J Rehabil Res Dev . 1987; 24(4) 87-92
- 44 Soede W, Berkhout A J, Bilsen F A. Development of a new directional hearing instrument based on array technology. J Acoust Soc Am . 1993; 94 785-798
- 45 Soede W, Bilsen F A, Berkhout A J. Assessment of a directional microphone array for hearing-impaired listeners. J Acoust Soc Am . 1993; 94 799-808
- 46 Stadler R W, Rabinowitz W M. On the potential of fixed arrays for hearing aids. J Acoust Soc Am . 1993; 94 1332-1342
- 47 Arlinger S, Billermark E, Oberg M, Lunner T, Hellgren J. Clinical trial of a digital hearing aid. Scand Audiol . 1998; 27 51-61
- 48 Kerlinger F N. Foundations of Behavioral Research, 2nd ed. New York: Holt, Rhinheart and Winston. 1973