Use of a sigmoidal-shaped function for noise attenuation in cochlear implants

• Published in: The Journal of the Acoustical Society of America Vol. 122; no. 4; pp. EL128 - EL134
• Main Authors: Hu, Yi, Loizou, Philipos C., Li, Ning, Kasturi, Kalyan
• Format: Journal Article
• Language: English
• Published: Woodbury, NY Acoustical Society of America 01.10.2007; American Institute of Physics
• Subjects: Algorithms; Auditory Threshold; Biological and medical sciences; Cochlear Implants; Humans; Investigative techniques, diagnostic techniques (general aspects); Medical sciences; Miscellaneous. Technology; Noise; Perceptual Masking; Phonetics; Prosthesis Design; Sound Spectrography; Speech Discrimination Tests; Speech Perception; Ultrasonic investigative techniques; Human; Prosthesis

A new noise reduction algorithm is proposed for cochlear implants that applies attenuation to the noisy envelopes inversely proportional to the estimated signal-to-noise ratio (SNR) in each channel. The performance of the proposed noise reduction algorithm is evaluated with nine Clarion CII cochlear...