A multi-band environment-adaptive approach to noise suppression for cochlear implants

2014 ◽  
Author(s):  
Fatemeh Saki ◽  
Taher Mirzahasanloo ◽  
Nasser Kehtarnavaz
Keyword(s):  
Cochlear Implants ◽  
Noise Suppression ◽  
Adaptive Approach ◽  
Multi Band

Use of S-Shaped Input-Output Functions for Noise Suppression in Cochlear Implants

2007 ◽  
Vol 28 (3) ◽  
pp. 402-411 ◽  
Author(s):  
Kalyan Kasturi ◽  
Philipos C. Loizou
Keyword(s):  
Cochlear Implants ◽  
Noise Suppression ◽  
Input Output

scholarly journals A New Approach for Noise Suppression in Cochlear Implants: A Single-Channel Noise Reduction Algorithm1

2020 ◽  
Vol 14 ◽  
Author(s):  
Huali Zhou ◽  
Ningyuan Wang ◽  
Nengheng Zheng ◽  
Guangzheng Yu ◽  
Qinglin Meng
Keyword(s):  
Noise Reduction ◽  
Cochlear Implants ◽  
Noise Suppression ◽  
Single Channel ◽  
Channel Noise ◽  
New Approach

Effects of Fundamental Frequency Contours on Sentence Recognition in Mandarin-Speaking Children With Cochlear Implants

2020 ◽  
Vol 63 (11) ◽  
pp. 3855-3864
Author(s):  
Wanting Huang ◽  
Lena L. N. Wong ◽  
Fei Chen ◽  
Haihong Liu ◽  
Wei Liang
Keyword(s):  
Cochlear Implants ◽  
Fundamental Frequency ◽  
Signal To Noise Ratio ◽  
Lexical Tone ◽  
Signal To Noise ◽  
Sentence Recognition ◽  
Test Conditions ◽  
Age Appropriate ◽  
F0 Contour ◽  
Appropriate Sentences

Purpose Fundamental frequency (F0) is the primary acoustic cue for lexical tone perception in tonal languages but is processed in a limited way in cochlear implant (CI) systems. The aim of this study was to evaluate the importance of F0 contours in sentence recognition in Mandarin-speaking children with CIs and find out whether it is similar to/different from that in age-matched normal-hearing (NH) peers. Method Age-appropriate sentences, with F0 contours manipulated to be either natural or flattened, were randomly presented to preschool children with CIs and their age-matched peers with NH under three test conditions: in quiet, in white noise, and with competing sentences at 0 dB signal-to-noise ratio. Results The neutralization of F0 contours resulted in a significant reduction in sentence recognition. While this was seen only in noise conditions among NH children, it was observed throughout all test conditions among children with CIs. Moreover, the F0 contour-induced accuracy reduction ratios (i.e., the reduction in sentence recognition resulting from the neutralization of F0 contours compared to the normal F0 condition) were significantly greater in children with CIs than in NH children in all test conditions. Conclusions F0 contours play a major role in sentence recognition in both quiet and noise among pediatric implantees, and the contribution of the F0 contour is even more salient than that in age-matched NH children. These results also suggest that there may be differences between children with CIs and NH children in how F0 contours are processed.

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