Speech Perception and Sound-Quality Rating with an Adaptive Nonlinear Frequency Compression Algorithm in Mandarin-Speaking Hearing Aid Users
Background Mandarin Chinese has a rich repertoire of high-frequency speech sounds. This may pose a remarkable challenge to hearing-impaired listeners who speak Mandarin Chinese because of their high-frequency sloping hearing loss. An adaptive nonlinear frequency compression (adaptive NLFC) algorithm has been implemented in contemporary hearing aids to alleviate the problem.
Purpose The present study examined the performance of speech perception and sound-quality rating in Mandarin-speaking hearing-impaired listeners using hearing aids fitted with adaptive NLFC (i.e., SoundRecover2 or SR2) at different parameter settings.
Research Design Hearing-impaired listeners' phoneme detection thresholds, speech reception thresholds, and sound-quality ratings were collected with various SR2 settings.
Study Sample The participants included 15 Mandarin-speaking adults aged 32 to 84 years old who had symmetric sloping severe-to-profound sensorineural hearing loss.
Intervention The participants were fitted bilaterally with Phonak Naida V90-SP hearing aids.
Data Collection and Analysis The outcome measures included phoneme detection threshold using the Mandarin Phonak Phoneme Perception test, speech reception threshold using the Mandarin hearing in noise test (M-HINT), and sound-quality ratings on human speech in quiet and noise, bird chirps, and music in quiet. For each test, five experimental settings were applied and compared: SR2-off, SR2-weak, SR2-default, SR2-strong 1, and SR2-strong 2.
Results The results showed that listeners performed significantly better with SR2-strong 1 and SR2-strong 2 settings than with SR2-off or SR2-weak settings for speech reception threshold and phoneme detection threshold. However, no significant improvement was observed in sound-quality ratings among different settings.
Conclusions These preliminary findings suggested that the adaptive NLFC algorithm provides perceptual benefit to Mandarin-speaking people with severe-to-profound hearing loss.
Keywordshearing aids - Mandarin Chinese - nonlinear frequency compression - speech perception - sound quality
This study was presented at the 46th Annual Scientific and Technology Conference of the American Auditory Society, Scottsdale, Arizona.
Received: 22 March 2019
Accepted: 25 January 2020
27 April 2020 (online)
© 2020. American Academy of Audiology. This article is published by Thieme.
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- 1 Simpson A. Frequency-lowering devices for managing high-frequency hearing loss: a review. Trends Amplif 2009; 13 (02) 87-106
- 2 Mao Y, Yang J, Hahn E, Xu L. Auditory perceptual efficacy of nonlinear frequency compression used in hearing aids: a review. J Otol 2017; 12 (03) 97-111
- 3 Simpson A, Bond A, Loeliger M, Clarke S. Speech intelligibility benefits of frequency-lowering algorithms in adult hearing aid users: a systematic review and meta-analysis. Int J Audiol 2018; 57 (04) 249-261
- 4 McDermott HJ. A technical comparison of digital frequency-lowering algorithms available in two current hearing aids. PLoS One 2011; 6 (07) e22358
- 5 McCreery RW, Brennan MA, Hoover B, Kopun J, Stelmachowicz PG. Maximizing audibility and speech recognition with nonlinear frequency compression by estimating audible bandwidth. Ear Hear 2013; 34 (02) e24-e27
- 6 Alexander JM, Rallapalli V. Acoustic and perceptual effects of amplitude and frequency compression on high-frequency speech. J Acoust Soc Am 2017; 142 (02) 908-923
- 7 Yang J, Qian J, Chen X. et al. Effects of nonlinear frequency compression on the acoustic properties and recognition of speech sounds in Mandarin Chinese. J Acoust Soc Am 2018; 143 (03) 1578-1590
- 8 McDermott H. Background story: SoundRecover—the importance of wide perceptual bandwidth. Phonak AG; March 2010. Accessed March 16, 2020 at https://www.phonakpro.com/content/dam/phonakpro/gc_hq/en/resources/evidence/white_paper/documents/technical_paper/bgs_SoundRecover_Bandwidth.pdf
- 9 Rehmann J, Jha S, Allegro Baumann S. SoundRecover2—The first adaptive frequency compression algorithm. Phonak Insight Paper. Stäfa, Switzerland: Phonak; 2016. . Accessed March 16, 2020 at: https://www.phonaknhs.co.uk/wp-content/uploads/2018/11/Insight_SoundRecover2.pdf
- 10 Akinseye GA, Dickinson AM, Munro KJ. Is non-linear frequency compression amplification beneficial to adults and children with hearing loss? A systematic review. Int J Audiol 2018; 57 (04) 262-273
- 11 Brennan MA, McCreery R, Kopun J. et al. Paired comparisons of nonlinear frequency compression, extended bandwidth, and restricted bandwidth hearing aid processing for children and adults with hearing loss. J Am Acad Audiol 2014; 25 (10) 983-998
- 12 Ching TY, Day J, Zhang V. et al. A randomized controlled trial of nonlinear frequency compression versus conventional processing in hearing aids: speech and language of children at three years of age. Int J Audiol 2013; 52 (Suppl. 02) S46-S54
- 13 Glista D, Scollie S, Bagatto M, Seewald R, Parsa V, Johnson A. Evaluation of nonlinear frequency compression: clinical outcomes. Int J Audiol 2009; 48 (09) 632-644
- 14 Wolfe J, John A, Schafer E, Nyffeler M, Boretzki M, Caraway T. Evaluation of nonlinear frequency compression for school-age children with moderate to moderately severe hearing loss. J Am Acad Audiol 2010; 21 (10) 618-628
- 15 Wolfe J, John A, Schafer E. et al. Long-term effects of non-linear frequency compression for children with moderate hearing loss. Int J Audiol 2011; 50 (06) 396-404
- 16 Wolfe J, Duke M, Schafer EC. et al. Preliminary evaluation of a novel non-linear frequency compression scheme for use in children. Int J Audiol 2017; 56 (12) 976-988
- 17 Wright SC, Joshi AP, Schafer EC. et al. A pilot study on the effects of nonlinear frequency compression on performance of individuals who speak Mandarin Chinese. J Acad Rehabilitative Audiol 2017; 50: 1-12
- 18 Glista D, Scollie S, Sulkers J. Perceptual acclimatization post nonlinear frequency compression hearing aid fitting in older children. J Speech Lang Hear Res 2012; 55 (06) 1765-1787
- 19 Peterson GE, Lehiste I. Revised CNC lists for auditory tests. J Speech Hear Disord 1962; 27: 62-70
- 20 Schmitt N, Winkler A, Boretzki M, Holube I. A phoneme perception test method for high-frequency hearing aid fitting. J Am Acad Audiol 2016; 27 (05) 367-379
- 21 Glista D, Hawkins M, Bohnert A, Rehmann J, Wolfe J, Scollie S. The effect of adaptive nonlinear frequency compression on phoneme perception. Am J Audiol 2017; 26 (04) 531-542
- 22 Glista D, Hawkins M, Vaisberg JM, Pourmand N, Parsa V, Scollie S. Sound quality effects of an adaptive nonlinear frequency compression processor with normal-hearing and hearing-impaired listeners. J Am Acad Audiol 2019; 30 (07) 552-563
- 23 Holube I, Fredelake S, Vlaming M, Kollmeier B. Development and analysis of an International Speech Test Signal (ISTS). Int J Audiol 2010; 49 (12) 891-903
- 24 Scollie S, Glista D, Seto J. et al. Fitting frequency-lowering signal processing applying the American Academy of Audiology Pediatric Amplification Guideline: Updates and protocols. J Am Acad Audiol 2016; 27 (03) 219-236
- 25 Wong LLN, Soli SD, Liu S, Han N, Huang MW. Development of the Mandarin hearing in noise test (MHINT). Ear Hear 2007; 28 (02) 70S-74S
- 26 Duanmu S. ed. Consonants. In: The Phonology of Standard Chinese. 2nd ed. New York, NY: Oxford University Press; 2007: 23-25
- 27 Alexander JM. Individual variability in recognition of frequency-lowered speech. Semin Hear 2013; 34: 86-109
- 28 Alexander JM. Nonlinear frequency compression: influence of start frequency and input bandwidth on consonant and vowel recognition. J Acoust Soc Am 2016; 139 (02) 938-957
- 29 Alexander JM, Kopun JG, Stelmachowicz PG. Effects of frequency compression and frequency transposition on fricative and affricate perception in listeners with normal hearing and mild to moderate hearing loss. Ear Hear 2014; 35 (05) 519-532
- 30 Parsa V, Scollie S, Glista D, Seelisch A. Nonlinear frequency compression: effects on sound quality ratings of speech and music. Trends Amplif 2013; 17 (01) 54-68
- 31 McCreery R, Alexander J, Brennan M, Hoover B, Kopun J, Stelmachowicz P. The influence of audibility on speech recognition with nonlinear frequency compression for children and adults with hearing loss. Ear Hear 2014; 35 (04) 440-447
- 32 Hopkins K, Khanom M, Dickinson AM, Munro KJ. Benefit from non-linear frequency compression hearing aids in a clinical setting: the effects of duration of experience and severity of high-frequency hearing loss. Int J Audiol 2014; 53 (04) 219-228