The speech enhancement techniques are often employed to improve the quality and intelligibility of the noisy speech signals. This paper discusses a novel technique for speech enhancement which is based on Singular Value Decomposition. This implementation utilizes a Genetic Algorithm based optimization method for reducing the effects of environmental noises from the singular vectors as well as t...

BACKGROUND speech perception of elderly, in silence and in the presence of background noise. AIM to characterize and compare the hearing abilities of elderly in a monaural speech perception test, in the presence and absence of background noise (Speech Discrimination Test - SDT and Speech Perception in Noise - SPIN). METHOD Participants of this study were 55 subjects of both genders, 60 year...

INTRODUCTION In ideal listening situations, subjects with normal hearing can easily understand speech, as can many subjects who have a hearing loss. OBJECTIVE To present the validation of the Word Recognition Test in a Free Field in the Presence of Noise in normal-hearing adults. METHODS Sample consisted of 100 healthy adults over 18 years of age with normal hearing. After pure tone audiome...

Speech perception experiments tell us a great deal about which factors affect human performance and behavior. In particular many experiments indicate that the signal-to-noise ratio spectrum is an important factor, indeed the signal-to-noise ratio spectrum is the basis of the Articulation Index, a standard measure of “speech channel capacity.” In this paper we compare speech recognition performa...

In this paper, a speech enhancement algorithm is proposed to improve the speech intelligibility for cochlear implant recipients. Our method is based on combination of harmonic estimation and traditional statistical method. Traditional statistical based speech enhancement method is effective only for stationary noise suppression, but not non-stationary noise. To address more complex noise scenar...

OBJECTIVE The study was designed to assess the effects of noise on the intelligibility of speech elements used in the Callsign Acquisition Test (CAT), developed by the U.S. Army Research Laboratory. The CAT consists of 126 test items, or callsigns, each of which is made up of a two-syllable word selected from the 18-item military alphabet (Alpha-Zulu) followed by a one-syllable number (all numb...

noise interference with employee’s speech communication is considered as one of the noise pollution effect in any workplace. these interferences can disrupt communication of necessary and vital data between individuals. and as a result can cause anything from a slight irritant to a serious safety hazard involving accident or even fatality. this study was focused on the analysis of the human err...

The 2012 NIST Speaker Recognition Evaluation, held in the autumn of 2012, was designed to examine a variety of factors affecting the performance of automatic systems for speaker recognition. Here we examine, for leading systems included in this evaluation, the observed effects on performance of five such factors: the inclusion in test segment speech of environmental noise or of added synthetic ...

Speech enhancement systems performing in Fourier or wavelet domain usually generate musical noise and distortion. It is possible to reduce musical noise and speech distortion by shaping residual noise. In this paper, we propose to implement a noise shaping method for a wavelet based noise reduction system. For noise shaping, we propose a noise classification method based on spectral shape of in...