Subjective and Objective Effects of Fast and Slow Compression on the Perception of Reverberant Speech in Listeners With Hearing Loss

Lu-Feng Shi; Doherty, Karen A.
October 2008
Journal of Speech, Language & Hearing Research;Oct2008, Vol. 51 Issue 5, p1328
Academic Journal
Purpose: The purpose of the current study was to assess the effect of fast and slow attack/release times (ATs/RTs) on aided perception of reverberant speech in quiet. Method: Thirty listeners with mild-to-moderate sensorineural hearing loss were tested monaurally with a commercial hearing aid programmed in 3 AT/RT settings: linear, fast (AT = 9 ms, RT = 90 ms), and slow (AT = 900 ms, RT = 1,500 ms). Stimuli consisted of 200 low-predictability Speech-Perception-in-Noise sentences, presented at 60 dB SPL at 4 reverberation levels (RT60 = 0, 0.6, 1.2, and 3.6 s). Listeners were randomly presented with 12 listening conditions (3 AT/RT settings x 4 reverberation levels). Intelligibility scores and clarity ratings of the sentences were obtained. Results: Aided speech intelligibility and clarity significantly decreased as reverberation increased. Both fast and slow ATs/RTs resulted in significantly higher speech intelligibility than linear, but no significant difference was observed between fast and slow ATs/RTs. Clarity rating was similar across 3 settings; however, rating decreased the fastest with fast AT/RT as reverberation increased. Slow AT/RT resulted in significantly higher real-ear aided response than fast AT/RT and linear, despite the same programmed gain for all settings. Conclusion: Reverberation had a more significant effect on aided speech perception than AT/RT, but fast and slow AT/RT resulted in improved speech intelligibility over linear amplification.


Related Articles

  • Comparison of Performance with Wide Dynamic Range Compression and Linear Amplification. Kam, Anna C. S.; Kam, Anna C.S.; Wong, Lena L.N.; Wong, Lena L. N. // Journal of the American Academy of Audiology;Sep1999, Vol. 10 Issue 9, p445 

    This study compared subject performance and preference using a compression-limiting hearing aid set to linear amplification (program 1) and wide dynamic range compression (WDRC, program 2). The frequency responses of the hearing aid were matched to a 65 dB SPL signal and maximum output to a...

  • Real-time multiband dynamic compression and noise reduction for binaural hearing aids. Kollmeier, Birger // Journal of Rehabilitation Research & Development;1993, Vol. 30 Issue 1, p82 

    Tests different versions of digital hearing aid algorithms in listeners with sensorineural hearing impairment using subjective quality assessment methods and speech intelligibility in noise. Improvement of speech intelligibility in noise by linear frequency shaping; Compression effect to speech...

  • Preferred Low- and High-Frequency Compression Ratios among Hearing Aid Users with Moderately Severe to Profound Hearing Loss. Keidser, Gitte; Dillon, Harvey; Dyrlund, Ole; Carter, Lyndal; Hartley, David // Journal of the American Academy of Audiology;Jan2007, Vol. 18 Issue 1, p17 

    This study aimed to determine the low- and high-frequency compression ratios of a fast-acting device that were preferred by people with moderately severe to profound hearing loss. Three compression ratios (1:1, 1.8:1, and 3:1) were combined in the low and high frequencies to produce nine schemes...

  • Quality of Care. Hampton, Dennis // ASHA Leader;5/15/2012, Vol. 17 Issue 6, p2 

    A letter to the editor is presented in response to the article "Hearing Aid Help," by Beverly Rosenstein in the April 3, 2012 issue.

  • From the Editor. Ricketts, Todd A. // Trends in Amplification;2002, Vol. 6 Issue 4, preceding p131 

    The article focuses on hearing aids. In the past 10 years one has seen commercial digital hearing aids move from non-existence to representing more than 30% of the hearing aids sold. As quickly as digital hearing aids have advanced one has seen even faster changes in other areas. One such area...

  • Do adaptive frequency response (AFR) hearing aids reduce `upward spread' of masking? Fabry, David A.; Leek, Marjorie R. // Journal of Rehabilitation Research & Development;1993, Vol. 30 Issue 3, p318 

    Measures pure-tone masking patterns in normal and hearing-impaired subjects. Spectral measurements of band-pass noise; Frequency response characteristics of the simulated adaptive frequency response (AFR) circuit; Spectral characteristics of noise filtered by AFR circuit; Masking pattern data.

  • Critical Review: Do Elderly Hearing Aid Users Perform Better on Speech Recognition in Noise Tests when Fitted Monaurally or Binaurally? Blay, Ashley // Canadian Hearing Report;2010, Vol. 5 Issue 5, p28 

    The article examines the performance of hearing aid users in speech recognition in noise tasks when fitted with amplification monaurally or binaurally. It reveals that the patients performed better on speech recognition in background noise tests while using unilateral amplification to the better...

  • Relationship between Laboratory Measures of Directional Advantage and Everyday Success with Directional Microphone Hearing Aids. Cord, Mary T.; Surr, Rauna K.; Walden, Brian E.; Dyrlund, Ole // Journal of the American Academy of Audiology;May2004, Vol. 15 Issue 5, p353 

    The improvement in speech recognition in noise obtained with directional microphones compared to omnidirectional microphones is referred to as the directional advantage. Laboratory studies have revealed substantial differences in the magnitude of the directional advantage across...

  • Effect of Release Time on Preferred Gain and Speech Acoustics. Muller, Thomas F.; Harris, Frances P.; Ellison, John C. // Journal of the American Academy of Audiology;Oct2004, Vol. 15 Issue 9, p605 

    Eighteen experienced hearing aid users with mild to moderate sensorineural hearing loss were fit with a digital hearing instrument. An adaptive procedure was used to determine their preferred gain setting for continuous speech under six conditions. Release time (RT) was set to 40, 160, or 640...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics