1 Modern hearing aid technology allows the response pattern of a multi-microphone directional array to be varied in response to the acoustic environment. For example, some systems attempt to identify noise sources and respond by steering an acoustic null or nulls formed by the directional microphones toward the noise source. While this technology holds the promise of improved speech intelligibi...

One of the most important aspects in operation rail vehicles is implementation transport while ensuring safety and comfort passengers. Technical condition wheel rolling surfaces has a direct impact on these factors. These elements are subject to wear tear continuous discrete form. forms wheel-flat that generate impulse noise. This translates into significant deterioration vibroacoustic comfort,...

The quality of the natural sound environment is important for well-being humans and urban sustainability. Therefore, it to study how soundscape affects with respect different densities vegetation, this frequency singing events pressure levels common birds that generate sounds in a commonly visited park Abuja, Nigeria. This involves recording birdsongs, measurement levels, questionnaire evaluati...

This paper presents the results of an evaluation of acoustic comfort such as background noise and reverberation time in teaching rooms in Height National School of Civil Engineering, Algeria. Four teaching rooms are evaluated: conference room, two classroom and amphitheatre. The acoustic quality of the classrooms has been analyzed based on measurements of sound pressure level inside room and re...

Sound reproduction within a car inside is a difficult task. Reverberation, reflection, echo, noise and vibration are some of the issues to account for. A first step in the direction of increasing sound comfort is that of equalizing the acoustic pressure response in the frequency domain. A direct solution is that of implementing with a convolution filter the inverse of the acoustic measurements ...

A new acoustic echo cancellation method for noisy environment is proposed and a real-time system is built. Different from the conventional acoustic echo cancellers, the proposed has a novel structure and can remove the echo effectively at low SNR. In our system, the speech with stationary noise is processed in order to separate the echo from the noise before updating the adaptive filter which i...

This paper summarizes the results of a large indoor environmental quality survey in office buildings, comparing green with non-green buildings. On average, occupants in green buildings were more satisfied with thermal comfort and air quality in their workspace. However, the average satisfaction scores in green buildings for lighting and acoustic quality were comparable to the non-green average....

Abstract—The present paper examines the impact noise transmission through some floor building assemblies. The Acoubat software numerical simulation has been used to simulate the impact noise transmission through different floor configurations used in Algerian construction mode. The results are compared with the available measurements. We have developed two experimental methods, i) field method,...

Many studies have found that infant-directed (ID) speech has higher pitch, has more exaggerated pitch contours, has a larger pitch range, has a slower tempo, and is more rhythmic than typical adult-directed (AD) speech. We show that the ID speech style reflects free vocal expression of emotion to infants, in comparison with more inhibited expression of emotion in typical AD speech. When AD spee...