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Showing 1 to 13 of 13 for “"reverberation time"”.
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Changes of voice production in artificial acoustic environments
… of the sidetone or playback of one's own voice), reverberation time and background noise. An increase in the sidetone led to a decrease in voice sound pressure levels, thus increasing voice comfort and voice control. This effect was consistent in different reverberation times considered. Mid-range …
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Robust speaker recognition in reverberant condition : toward greater biometric security
… technology for security applications in modern times. The primary challenge for automatic speaker recognition is to deal with the variability of the environments and channels from where the speech was obtained. In previous work, good results have been achieved for clean, high-quality speech with …
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Acoustic Model Adaptation For Reverberation Robust Automatic Speech Recognition
Reverberation is a natural phenomenon observed in enclosed environments. It occurs due to the reflection of the signal from the walls and objects in the room. For humans, reverberation is beneficial as it reinforces sound and also provide the sensation of space. However, for automatic speech …
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The effect of modular acoustics on a performer's perception in multi-use (symphonic and operatic) concert halls
… of instrumentalists and vocal musicians? Reverberation times in the Rogers Center auditorium in Andover, MA were taken onstage with the hall's acoustical curtains either hidden or exposed. Performers in the school musical and in a local symphony group were given surveys after doing two …
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Extracting room acoustic parameters from received speech signals using artificial neural networks
… learning regimes are developed to extract Reverberation Time (RT), Early Decay Time (EDT) and Speech Transmission Index (STI) from received speech signals. Utilising naturalistic sounds - speech - as excitations, the developed methods circumvent the use of unpleasant noisy test signals and …
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Confirming sound absorption characteristics of box absorbers that utilize laser-cut micro-slits on the top surface as the means of sound absorption, with an exploration of different architectural installations
… in standing wave tubes and in a controlled reverberation room. This paper seeks to confirm the sound absorbing characteristics in a less-than-ideal test setup to model how the box absorbers would perform acoustically in an actual installation. It also explores different configurations of the …
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Acoustic and non-acoustic performance of coal bottom ash as sound absorptive material for reducing railway noise level
… 30% of sound by conducting impedance tube and reverberation time. In addition, the Noise Reduction Coefficient (NRC) performance for CBA concrete addresses more than 35% of the absorbed railway sound. CBA concrete showed an improvement in acoustic properties compared to normal concrete as it is …
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Prediction of sound pressure and intensity fields in rooms and near surfaces by ray tracing
… capable of predicting sound-pressure level, reverberation time and lateral energy fraction was translated into MATLAB code and modified to increase accuracy by including phase. Modifications included phase effects due to path length travelled and phase changes imparted by surface reflections …
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Blind Estimation of Perceptual Quality for Modern Speech Communications
… signal representation, where speech and reverberation tail components are shown to be separable, is used for blind characterization of room acoustics. In particular, estimators of reverberation time, direct-to-reverberation energy ratio, and reverberant speech quality are developed. …
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Balancing Sight + Sound: A study of acoustics and architecture
… purpose, such as a lecture hall with a long reverberation time making it impossible to distinguish syllables and understand the speaker. In the case of musical performances, the acoustical considerations of a design can completely alter the way sound travels from the performers to the …
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Effects of anechoic vs. reverberant sound-field, subject gender, and outlier dismissal on the real-ear attenuation of hearing protection devices
… was reverberant, with frequency-specific reverberation time characteristics as specified in ANSI $3.19- 1974, "Method for the Measurement of Real-Ear Protection of Hearing Protectors and Physical Attenuation of Earmuffs" and with three loudspeakers, one in each principal plane of the room. …
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Understanding X-ray reflection as a probe of accreting black holes
… accreting black holes is exploited in the use of reverberation time lags, where variability in the continuum is seen to lead that in its reflection from the accretion disc, to measure the distances between the X-ray emitting corona and the reflector. Ray tracing calculations are developed to …
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Aircraft noise, overheating and poor air quality in London primary schools' classrooms
… benchmarks for background noise level and reverberation time and included in BB93).