Children 5, 9, and 11 years of age and young adults attempted to identify the final word of sentences recorded by a female speaker. The sentences were presented in two levels of multitalker babble, and participants responded by selecting one of four pictures. In a low-noise condition, the signal-to-noise ratio (SNR) was adjusted for each age group to yield 85% correct performance. In a high-noi...

OBJECTIVE This study aimed to evaluate the use of directionality in hearing aids with wireless synchronization on localization and speech intelligibility in noise. MATERIALS AND METHODS This study included 25 individuals with bilateral mild to moderate flat sensorineural hearing loss. For the localization experiment, eight loudspeakers (Genelec 8020B) arranged in a circle covering a 0-360° an...

In this paper, we propose a new speech enhancement system using the wavelet thresholding algorithm. The basic wavelet thresholding algorithm has some defects including the assumption of white Gaussian noise (WGN), malfunction in unvoiced segments, bad auditory quality, etc. In the proposed system, we introduce a new algorithmwhich does not require any voiced/ unvoiced detection system.Also, in ...

Although the speech transmission index (STI) has been shown to predict successfully the effects of linear distortions introduced by filtering and additive noise, it does not account for non-linear distortions present in noise-suppressed speech. In this study, the normalized covariance metric (NCM), a STIbased intelligibility measure, was modified to reduce the effects of non-linear distortions ...

The Words-in-Noise (WIN) test uses monosyllabic words in seven signal-to-noise ratios of multitalker babble (MTB) to evaluate the ability of individuals to understand speech in background noise. The purpose of this study was to evaluate the criterion validity of the WIN by comparing recognition performances under MTB and speech-spectrum noise (SSN) using listeners with normal hearing and listen...

The aim of the study was to determine signal-to-noise ratio (SNR) for Speech Reception Threshold (SRT) young persons with normal hearing. following three tests available Polish language were used: New Articulation Lists (NAL-93) version 2011, Sentence Test (PST) and Matrix (PSMT). When using PST PSMT masking signal babble noise made material contained in test. For NAL-93 speech noise. reception...

We investigated the speech intelligibility differences of normal and bone-conduction stereo headphones of target speech localized at 45◦ on the horizontal plane when competing noise is present. This was our effort to study the possible effect of crosstalk found in bone-conduction headphones on speech intelligibility. All sound sources were localized on the horizontal plane. Target speech was lo...

The first step of missing feature methods in text-independent speaker identification is to identify highly corrupted spectrographic representation of speech as missing feature. Most mask estimation techniques rely on explicit estimation of the characteristics of the corrupting noise and usually fail to work with inaccurate estimation of noise. We present a mask estimation technique that uses ne...

A new approach to single channel speech enhancement is proposed using a modified a priori SNR and spectral gain control. The proposed approach is first directed toward finding self adaptive averaging factor to estimate the apriori SNR. Next, spectral gain is reduced in order to suppress effects of the noise in the speech absent frames. Further, in the speech present frames, in order to reduce s...

Most of isolated-word speech recognition systems need to detect boundaries of utterances. In this paper, we present a new approach to accomplish this task of endpoints identification. The proposed algorithm has very low computational complexity, since the parameters used for discrimination are obtained through a re-use of calculations already made by a mel-cepstrum frontend. This endpointer wor...