A method for the calculation of the speech intelligibility under conditions of reverberation and noise
The method of calculation reported uses the concepts of useful speech level (i. e. maximum level of the speech signal reached within 50 ms after the arrival of a speech pulse front at the ears of the listener), reverberant speech level (i. e. maximum level in the reverberation period exclusive of the first 50 ms), the disturbing (random) noise level, the reverberation time (each of them in the five octave bands from 150 to 4800 c/s) and the articulation index. Results from measurements with and without headphones, in an anechoic room, in a reverberation chamber and in churches and theatres are compared with values predicted with the aid of the method; the agreement is satisfactory. The design of speech communication systems under reverberant and noisy conditions is facilitated.
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Document Type: Research Article
Publication date: January 1, 1957
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- Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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