Post-processing methods can be used in mobile communications to improve the intelligibility of speech in adverse near-end noise conditions. This study proposes a phase spectrum modification method for intelligibility enhancement in mobile devices. The method first modifies the phase spectrum of speech in order to reduce the amplitude range of the signal. The amplitude level is then equalized to...

In mobile devices, perceived speech signal degrades significantly in the presence of background noise as it reaches directly at the listener's ears. There is a need to improve the intelligibility and quality of the received speech signal in noisy environments by incorporating speech enhancement algorithms. This paper focuses on speech enhancement method including auditory masking propertie...

In mobile devices, perceived speech signal degrades significantly in the presence of background noise as it reaches directly at the listener's ears. There is a need to improve the intelligibility and quality of the received speech signal in noisy environments by incorporating speech enhancement algorithms. This paper focuses on speech enhancement method including auditory masking propertie...

In mobile devices, perceived speech signal degrades significantly in the presence of background noise as it reaches directly at the listener's ears. There is a need to improve the intelligibility and quality of the received speech signal in noisy environments by incorporating speech enhancement algorithms. This paper focuses on speech enhancement method including auditory masking propertie...

This study investigated effects, on a speech intelligibility, of asynchronicity between a speech signal and a talker’s moving image induced by time-expansion of the speech signal. First, a word intelligibility test (Exp. 1) was administered to younger listeners. Words were processed using STRAIGHT software to expand the speech signal by 0 to 400 ms. The word intelligibility test was administere...

OBJECTIVE The development of a test of virtual speech intelligibility in noise that enables assessment in typical, everyday listening situations. To eliminate extraneous confounding factors, digital signal processing was incorporated to simulate listening environments and source locations and allow presentation of stimuli via earphones. DESIGN Source-to-eardrum transfer functions measured on ...

The STI (speech transmission index) and SII (speech intelligibility index) are the two primary objective rating metrics for speech intelligibility. The differences between their calculation models and measured data are examined in this study, and the results show that there is no fundamental difference between them, except those caused due to the different calculation models. Therefore, both ST...

A growing body of experimental research suggests that speech supplementation strategies can markedly increase speech intelligibility for individuals with dysarthria (D. Beukelman & K. Yorkston, 1977; E. Crow & P. Enderby, 1989; L. Hunter, T. Pring, & S. Martin, 1991; K. C. Hustad & D. R. Beukelman, 2001). However, studies in which speech supplementation strategies were actually implemented by s...

Most intelligibility tests are based on the use of monosyllabic test stimuli. This constraint eliminates the ability to measure the effects of lexical stress patterns, complex phonotactic organizations, and morphological complexity on intelligibility. Since these aspects of lexical structure affect speech production (e.g., by changing syllable duration), it is likely that they affect the struct...

Recebido em 28.11.2007. Revisado em 01.03.2008; 26.05.2008. Aceito para Publicação em 26.05.2008. Abstract Background: contextual cues intrinsic to speech stimuli can have an influence on speech intelligibility measurements; however, the influence of cues that depend on the acoustic signal, such as speech rate and vocal loudness, need further investigation. Aim: to examine whether possible redu...