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Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: An Auditory-Masking-Threshold-Based Noise Suppression Algorithm GMMSE-AMT[ERB] for Listeners with Sensorineural Hearing Loss | EURASIP Journal on Applied Signal Processing 2005 18 2938-2953 2005 Hindawi Publishing Corporation An Auditory-Masking-Threshold-Based Noise Suppression Algorithm GMMSE-AMT ERB for Listeners with Sensorineural Hearing Loss Ajay Natarajan Robust Speech Processing Group Center for Spoken Language Research and Department of Electrical and Computer Engineering University of Colorado at Boulder Boulder CO 80309-0309 USA Email nataraja@cslr.colorado.edu John H. L. Hansen Center for Robust Speech Systems Department of Electrical Engineering Erik Jonsson School of Engineering Computer Science and Callier Center Speech and Hearing School of Behavioral and Brain Sciences University of Texas at Dallas Richardson TX 75083 USA Email john.hansen@utdallas.edu Kathryn Hoberg Arehart Department of Speech Language and Hearing Sciences University of Colorado at Boulder 2501 Kittredge Loop Road UCB 409 Boulder CO 80309-0409 USA Email arehart@colorado.edu Jessica Rossi-Katz Department of Speech Language and Hearing Sciences University of Colorado at Boulder 2501 Kittredge Loop Road UCB 409 Boulder CO 80309-0409 USA Email rossija@colorado.edu Received 6 May 2004 Revised 21 December 2004 This study describes a new noise suppression scheme for hearing aid applications based on the auditory masking threshold AMT in conjunction with a modified generalized minimum mean square error estimator GMMSE for individual subjects with hearing loss. The representation of cochlear frequency resolution is achieved in terms of auditory filter equivalent rectangular bandwidths ERBs . Estimation of AMT and spreading functions for masking are implemented in two ways with normal auditory thresholds and normal auditory filter bandwidths GMMSE-AMT ERB -NH and with elevated thresholds and broader auditory filters characteristic of cochlear hearing loss GMMSE-AMT ERB -HI . Evaluation is performed using speech corpora with objective quality measures segmental SNR Itakura-Saito along with formal listener .
