Effects of dynamic-range compression on temporal acuity

  • Alan Wiinberg Hearing Systems Group, Department of Electrical Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark
  • Morten Løve Jepsen Hearing Loss Compensation, Department of Electronics and Audiology, Widex A/S, Lynge, Denmark
  • Bastian Epp Hearing Systems Group, Department of Electrical Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark
  • Torsten Dau Hearing Systems Group, Department of Electrical Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark


Some of the challenges that hearing-aid listeners experience with speech perception in complex acoustic environments may originate from limitations in the temporal processing of sounds. To systematically investigate the influence of hearing impairment and hearing-aid signal processing on temporal processing, temporal modulation transfer functions (TMTFs) and “supra-threshold” modulation-depth discrimination (MDD) thresholds were obtained in normal-hearing (NH) and hearing-impaired (HI) listeners with and without wide-dynamic range compression (WDRC). The TMTFs were obtained using tonal carriers of 1 and 5 kHz and modulation frequencies from 8 to 256 Hz. MDD thresholds were obtained using a reference modulation depth of −15 dB. A compression ratio of 2:1 was chosen. The attack and release time constants were 10 and 60 ms, respectively. For both carrier frequencies the TMTF thresholds decreased with the physical com-pression of the modulation depth due to the WDRC. Indications of reduced temporal resolution in the HI listeners were observed in the TMTF patterns for the 5-kHz carrier. Significantly higher MDD thresholds were found for the HI group relative to the NH group. No relationship was found between the MDD thresholds and the TMTF threshold. These findings indicate that the two measures may represent different aspects of temporal processing.


Byrne, D., Parkinson, A, and Newall, P. (1990). “Hearing aid gain and frequency response requirements of the severely/profoundly hearing-impaired,” Ear Hearing, 11, 40-49.

Dau, T., Kollmeier, B., and Kohlrausch, A. (1997). “Modeling auditory processing of amplitude modulation. I. Modulation detection and masking with narrowband carriers,” J. Acoust. Soc. Am., 102, 2892-2905.

Dau, T., Verhey, J., and Kohlrausch, A. (1999). “Intrinsic envelope fluctuations and modulation-detection thresholds for narrowband noise carriers,” J. Acoust. Soc. Am., 106, 2752-2760.

Edwards B. (2004). “Hearing aids and hearing impairment,” in Speech Processing in the Auditory System. Eds. A. Greenberg, W.A. Ainsworth, A.N. Popper, and R.R. Fay. New York, NY: Springer, pp. 339-421.

Jenstad L.M., Pumford, J., Seewald, R.C., and Cornelisse, L.E. (2000). “Comparison of linear gain and wide dynamic range compression hearing aid circuits II: Aided loudness measures,” Ear Hearing, 21, 32-44.

Kohlrausch, A., Fassel, R., and Dau, T. (2000). “The influence of carrier level and frequency on modulation and beat-detection thresholds for sinusoidal carriers,” J. Acoust. Soc. Am., 108, 723-734.

Lee, J. and Bacon, S.P. (1997). “Amplitude modulation depth discrimination of a sinu-soidal carrier: Effect of stimulus duration,” J. Acoust. Soc. Am., 101, 3688-3693.

Moore, B.C.J. and Glasberg, B.R. (2001). “Temporal modulation transfer functions obtained using sinusoidal carriers with normally hearing and hearing-impaired listeners,” J. Acoust. Soc. Am., 110, 1067-1073.

Rosen, S. (1992). “Temporal information in speech: Acoustic, auditory and linguistic aspects,” Philos. T. R. Soc. B., 336, 367-373.

Ricketts, T.A. and Bentler, R.A. (1996). “The effect of test signal type and band-width on the categorical scaling of loudness,” J. Acoust. Soc. Am., 99, 2281-2287.

Shannon R.V., Zeng, F.-G., Kamath, V., Wygonski, J., and Ekelid, M. (1995). “Speech recognition with primarily temporal cues,” Science, 270, 37-39.

Stone, M.A. and Moore, B.C.J. (1992). “Syllabic compression: Effective com-pression ratios for signals modulated at different rates,” Br. J. of Aud., 26, 351-361.

Stone, M.A., and Moore, B.C.J. (2003). “Effect of the speed of a single-channel dynamic range compressor on intelligibility in a competing speech task,” J. Acoust. Soc. Am., 114, 1023-1034.

Stone, M.A., Füllgrabe, C., Mackinnon, R.C., and Moore, B.C.J. (2011). “The im-portance of speech intelligibility of random fluctuations in ‘steady’ background noise,” J. Acoust. Soc. Am., 130, 2874-2881.

How to Cite
Wiinberg, A., Jepsen, M., Epp, B., & Dau, T. (2015). Effects of dynamic-range compression on temporal acuity. Proceedings of the International Symposium on Auditory and Audiological Research, 5, 293-300. Retrieved from https://proceedings.isaar.eu/index.php/isaarproc/article/view/2015-34
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