Long-Term Effects of Non-Linear Frequency Compression on Performance of Music and Speech Perception

2015 ◽  
Vol 03 (03) ◽  
Author(s):  
Marinda Uys Matthias Latzel
Keyword(s):  
Speech Perception ◽  
Long Term Effects ◽  
Frequency Compression ◽  
Linear Frequency ◽  
Non Linear

Long-term effects of non-linear frequency compression for children with moderate hearing loss

2011 ◽  
Vol 50 (6) ◽  
pp. 396-404 ◽  
Author(s):  
Jace Wolfe ◽  
Andrew John ◽  
Erin Schafer ◽  
Myriel Nyffeler ◽  
Michael Boretzki ◽  
...  
Keyword(s):  
Hearing Loss ◽  
Long Term Effects ◽  
Frequency Compression ◽  
Linear Frequency ◽  
Non Linear ◽  
Moderate Hearing Loss

scholarly journals The influence of non-linear frequency compression on the perception of music by adults with a moderate to severe hearing loss: Subjective impressions

2012 ◽  
Vol 59 (1) ◽  
Author(s):  
Marinda Uys ◽  
Lidia Pottas ◽  
Bart Vinck ◽  
Catherine Van Dijk
Keyword(s):  
Quality Of Life ◽  
Hearing Loss ◽  
Speech Perception ◽  
Hearing Aid ◽  
Severe Hearing Loss ◽  
Frequency Compression ◽  
Linear Frequency ◽  
Musical Perception ◽  
Non Linear

Objective: To date, the main direction in frequency-lowering hearing aid studies has been in relation to speech perception abilities. With improvements in hearing aid technology, interest in musical perception as a dimension that could improve hearing aid users’ quality of life has grown. The purpose of this study was to determine the influence of non-linear frequency compression (NFC) on hearing aid users’ subjective impressions of listening to music. Design & sample: A survey research design was implemented to elicit participants’ (N=40) subjective impressions of musical stimuli with and without NFC. Results: The use of NFC significantly improved hearing aid users’ perception of the musical qualities of overall fidelity, tinniness and reverberance. Although participants preferred to listen to the loudness, fullness, crispness, naturalness and pleasantness of music with the use of NFC, these benefits were not significant. Conclusion: The use of NFC can increase hearing aid users’ enjoyment and appreciation of music. Given that a relatively large percentage of hearing aid users express a loss of enjoyment of music, audiologists should not ignore the possible benefits of NFC, especially if one takes into account that previous research indicates speech perception benefits with this technology.

scholarly journals Study suggests that non-linear frequency compression helps children with moderate loss

2009 ◽  
Vol 62 (9) ◽  
pp. 32 ◽  
Author(s):  
Jace Wolfe ◽  
Teresa Caraway ◽  
Andrew John ◽  
Erin C. Schafer ◽  
Myriel Nyffeler
Keyword(s):  
Frequency Compression ◽  
Linear Frequency ◽  
Non Linear

scholarly journals Effects of Adaptive Non-linear Frequency Compression in Hearing Aids on Mandarin Speech and Sound-Quality Perception

2021 ◽  
Vol 15 ◽  
Author(s):  
Shuang Qi ◽  
Xueqing Chen ◽  
Jing Yang ◽  
Xianhui Wang ◽  
Xin Tian ◽  
...  
Keyword(s):  
Hearing Loss ◽  
Sensorineural Hearing Loss ◽  
Hearing Aids ◽  
Sound Quality ◽  
Compression Algorithm ◽  
Frequency Compression ◽  
Quality Perception ◽  
Linear Frequency ◽  
Sentence Recognition ◽  
Non Linear

ObjectiveThis study was aimed at examining the effects of an adaptive non-linear frequency compression algorithm implemented in hearing aids (i.e., SoundRecover2, or SR2) at different parameter settings and auditory acclimatization on speech and sound-quality perception in native Mandarin-speaking adult listeners with sensorineural hearing loss.DesignData consisted of participants’ unaided and aided hearing thresholds, Mandarin consonant and vowel recognition in quiet, and sentence recognition in noise, as well as sound-quality ratings through five sessions in a 12-week period with three SR2 settings (i.e., SR2 off, SR2 default, and SR2 strong).Study SampleTwenty-nine native Mandarin-speaking adults aged 37–76 years old with symmetric sloping moderate-to-profound sensorineural hearing loss were recruited. They were all fitted bilaterally with Phonak Naida V90-SP BTE hearing aids with hard ear-molds.ResultsThe participants demonstrated a significant improvement of aided hearing in detecting high frequency sounds at 8 kHz. For consonant recognition and overall sound-quality rating, the participants performed significantly better with the SR2 default setting than the other two settings. No significant differences were found in vowel and sentence recognition among the three SR2 settings. Test session was a significant factor that contributed to the participants’ performance in all speech and sound-quality perception tests. Specifically, the participants benefited from a longer duration of hearing aid use.ConclusionFindings from this study suggested possible perceptual benefit from the adaptive non-linear frequency compression algorithm for native Mandarin-speaking adults with moderate-to-profound hearing loss. Periods of acclimatization should be taken for better performance in novel technologies in hearing aids.

scholarly journals Study of the long-term effects of frequency compression by behavioral verbal tests in adults

CoDAS ◽  
2015 ◽  
Vol 27 (1) ◽  
pp. 37-43 ◽  
Author(s):  
Vanessa Clarizia Marchesin ◽  
Maria Cecília Martinelli Iório
Keyword(s):  
Hearing Loss ◽  
Hearing Aids ◽  
High Frequency ◽  
Daily Activities ◽  
Long Term Effects ◽  
Frequency Compression ◽  
High Frequencies ◽  
Hearing Aid Benefit ◽  
Consonant Sounds

PURPOSE: To verify the effect of long-term use of hearing aids with frequency compression for verbal behavior tests and daily activities. METHODS: Thirty-two adults, aged between 30 and 60 years old, with moderate to severe sensorineural hearing loss at high frequencies with steeply sloping configuration were divided into two groups: 16 with hearing aids with frequency compression algorithm enabled and 16 not enabled. All participants underwent the detection tests of consonant sounds, monosyllable recognition in quiet environments, identification of fricative monosyllables, and Abbreviated Profile of Hearing Aid Benefit (APHAB) questionnaire in five times throughout a 12-month trial. RESULTS: Detection of consonant sounds, recognition of monosyllables in quiet environments and identification of fricative monosyllables improved significantly with frequency compression enabled. Participants had their APHAB scores improved whether they were adapted to the frequency compression or not. CONCLUSION: Frequency compression provides the anticipated improvement in audibility, detection of high-frequency consonant sounds, and recognition of monosyllables.

Immediate and long-term effects of hearing loss on the speech perception of children

2009 ◽  
Vol 126 (3) ◽  
pp. 1477-1485 ◽  
Author(s):  
Andrea Pittman ◽  
Kendell Vincent ◽  
Leah Carter
Keyword(s):  
Hearing Loss ◽  
Speech Perception ◽  
Long Term Effects

scholarly journals 477Long-term exposure to low PM2.5 and NO2 and all-cause mortality in Australia: a difference-in-differences analyses

2021 ◽  
Vol 50 (Supplement_1) ◽  
Author(s):  
Rongbin Xu ◽  
Shanshan Li ◽  
Michael Abramson ◽  
Yuming Guo
Keyword(s):  
Moving Average ◽  
Ambient Air ◽  
Ambient Air Pollution ◽  
Long Term Effects ◽  
Distributed Lag ◽  
All Cause Mortality ◽  
Non Linear ◽  
Residual Confounding ◽  
Level 2

Abstract Background Although many cohort studies have documented the long-term effects of ambient air pollution on mortality, but they suffer from residual confounding, being unable to control unmeasured confounders, and are often not population representative. A recently developed variant of difference-in-difference (DID) approach is promising to address these limitations. Methods We collected annual all-cause death data from 2,193 statistical areas level-2 (SA2) in Australia during 2001-2015. Area-level annual mean concentrations of PM2.5 and NO2 were derived from widely used grid (0.01°×0.01° and 0.1°×0.1°, respectively) datasets. The variant of DID method was used to evaluate the causal relationship between annual PM2.5 and NO2 and all-cause mortality. We further developed this method by considering non-linear associations and lag impacts using distributed lag non-linear model. Results The impacts of low PM2.5 (1.94-12.00 µg/m3) and NO2 (0-7.41 µg/m3) on all-cause mortality were non-linear and lasted for 0-3 year and 0-6 year, respectively. The moving average PM2.5 (0-3 year) and NO2 (0-6 year) showed non-significant impacts below the thresholds (4.44 µg/m3 and 1.10 µg/m3) observed, while every 1 µg/m3 increase above the thresholds were associated with 2.4% (95%CI: 1.6-3.3%) and 9.4% (95%CI: 7.9-10.8%) increase in all-cause mortality, respectively. We estimated that 3.0% (95%CI: 2.0-3.9%) and 9.9% (8.3-11.3%) deaths were attributable to PM2.5 and NO2, respectively. Conclusions We further developed the causal DID model and documented the deadly impacts of long-term exposure to low PM2.5 and NO2 with thresholds and lag periods. Key messages Long-term exposure to low PM2.5 and NO2 are still deadly but have thresholds.

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