Distant Speech Recognitionpresents a contemporary and comprehensive description of both theoretic abstraction and practical issues inherent in the distant ASR problem. While traditional ASR systems underperform for speech captured with far-field sensors, there are a number of novel techniques within the recognition system as well as techniques developed in other areas of signal processing that can mitigate the deleterious effects of noise and reverberation, as well as separating speech from overlapping speakers. This is due to a broad variety of effects such as background noise, overlapping speech from other speakers, and reverberation.
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Ultimate Beginner Tech Start Series Live Sound Basics PDF Download Book DetailĪ complete overview of distant automatic speech recognition The performance of conventional Automatic Speech Recognition (ASR) systems degrades dramatically as soon as the microphone is moved away from the mouth of the speaker. In a final chapter examples of experimental buildings with high sound insulation are explained. The analysis and estimation of measurement uncertainty is discussed in detail. Measurement methods in building acoustics are presented with emphasis on modern methods using MLS signals or sine sweeps. One chapter is devoted to the subjective evaluation of sound insulation, particularly noise from neighbours, and how this can be applied in a sound classification scheme for dwellings.
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Sound transmission through windows and facades is represented by a model that allows any angle on incidence, including the special case of grazing incidence. At low frequencies statistical energy analysis is replaced by modal energy analysis. A general description is provided, with the modal density in the structures as a key parameter. Thus, the description is not restrained by the common assumption of bending waves which is characteristic of thin plates, only.
Theoretical models are set out for sound transmission in buildings, with an emphasis on thick and heavy constructions. The book explains sound insulation in buildings at a level suitable for both graduate students and expert consultants. The Acoustics Of Small Rooms At Low Frequencies PDF Download Book Detail Divided into clear sections, it covers: Sound propagation-the effects of boundaries, sound absorbers, and time conditions Physiology and psychoacoustics Methods and techniques of room and sound field optimization Examples of how these principles apply in real situations Measurement and modeling techniques Tackling these specific aspects of physics, sound perception, and applications for small spaces, Acoustics of Small Rooms brings together important facets of small room acoustics. Changes in wavelength to room size ratio and the time difference between the direct and reflected sound at the listening location mean that the acoustics of small spaces are quite different to those of large spaces. The expensive sound equipment of a recording studio or the stereo in a car or living room is likewise rendered useless if the acoustic environment is not right for them.
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Much time is spent working out how to optimize the acoustics of large rooms, such as auditoria, but the acoustics of small rooms and environments can be just as vital.
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