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Author : Karl S. Pearsons
Publisher :
ISBN 13 :
Total Pages : 82 pages
Book Rating : 4.F/5 ( download)
Download or read book Speech Levels in Various Noise Environments written by Karl S. Pearsons and published by . This book was released on 1977 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Karl S. Pearsons
Publisher :
ISBN 13 :
Total Pages : 81 pages
Book Rating : 4.:/5 (562 download)
Download or read book Speech Levels in Various Noise Environments written by Karl S. Pearsons and published by . This book was released on 1977 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 70 pages
Book Rating : 4.:/5 (411 download)
Download or read book Speech Levels in Various Noise Environments written by and published by . This book was released on 1977 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : United States. Office of Noise Abatement and Control
Publisher :
ISBN 13 :
Total Pages : 196 pages
Book Rating : 4.3/5 (91 download)
Download or read book Information on Levels of Environmental Noise Requisite to Protect Public Health and Welfare with an Adequate Margin of Safety written by United States. Office of Noise Abatement and Control and published by . This book was released on 1974 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : United States. Office of Noise Abatement and Control. Office of Scientific Assistant
Publisher :
ISBN 13 :
Total Pages : 36 pages
Book Rating : 4.3/5 (121 download)
Download or read book Protective Noise Levels written by United States. Office of Noise Abatement and Control. Office of Scientific Assistant and published by . This book was released on 1978 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Michele Honey Segal
Publisher :
ISBN 13 :
Total Pages : 184 pages
Book Rating : 4.E/5 ( download)
Download or read book Speech Intelligibility in the Space Shuttle Mid-deck Noise Environment written by Michele Honey Segal and published by . This book was released on 1999 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Alice Harriet Suter
Publisher :
ISBN 13 :
Total Pages : 126 pages
Book Rating : 4.:/5 (31 download)
Download or read book The Ability of Mildly Hearing-impaired Individuals to Discriminate Speech in Noise written by Alice Harriet Suter and published by . This book was released on 1978 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ryan Laquent Urquhart
Publisher :
ISBN 13 :
Total Pages : 182 pages
Book Rating : 4.:/5 (518 download)
Download or read book The Effects of Noise on Speech Intelligibility and Complex Cognitive Performance written by Ryan Laquent Urquhart and published by . This book was released on 2002 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: A human factors experiment was conducted to assess whether a reduction in noise at the ear would cause an improvement in speech intelligibility, an improvement in cognitive performance, and/or a reduction in subjective mental workload. Modified Rhyme Test (MRT) stimuli were used to determine intelligibility and specific tests within the Complex Cognitive Assessment Battery (CCAB) were used to assess cognitive performance. The tests chosen from the CCAB were: Tower Puzzle, Logical Relations, and Numbers and Words. These tests were chosen because of the specific set of cognitive functions that they measure which corresponded to command and control tasks. Participants performed the MRT and CCAB tests simultaneously in a 114 dBA noise environment at two speech levels, 83 dB (linear) and 96 dB (linear), using two communication microphones, Gentex Model 1453 and a prototype communication microphone developed by Adaptive Technologies Inc. (ATI). The noise used in the experiment was from a recording made inside a US Army Bradley Fighting Vehicle. Subjective mental workload was assessed using the NASA-TLX and Modified Cooper-Harper (MCH) immediately after the experiment. Results indicated that the communication microphone developed by ATI reduced the noise level at the ear better than the current Gentex microphone. However, the Gentex microphone produced significantly higher speech intelligibility scores at the 96 dB speech level.
Author : Katharine Lynn Fitzharris
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (984 download)
Download or read book Speech Understanding in Noise written by Katharine Lynn Fitzharris and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The most common complaint of individuals with hearing loss is their inability to understand speech in noisy environments; thus, speech-in-noise (SIN) has been an area of tremendous research. It has been established that a complex interaction of peripheral and central auditory systems underlies the ability to comprehend speech in degraded environments. Methodologically, however, behavioral and electrophysiological studies have been disparate: where behavioral and clinical testing establishes a variable signal-to-noise ratio (SNR) threshold based on an individual’s performance, studies utilizing auditory event-related potentials (AERPs) tend to use fixed SNR values, resulting in variable performance. Both behavioral and AERP studies have illustrated the impact of stimulus effects on SIN performance, e.g., SNR and masker type. The purpose of this study was to use AERPs in order to evaluate the interactions between peripheral and central systems in the processing of speech. Using behaviorally-established SNR levels (60% correct, 100% correct), two types of background noise (speech-shaped noise, multitalker babble), and two signal types (syllables, words) in an oddball task, AERPs were recorded and analyzed relative to the peak amplitudes and latencies of the N1, P2, and P3. Results from 21 young adults indicate that even when behavioral accuracy is controlled for, there are complex effects of stimulus factors on the neural underpinnings of speech processing.
Author : P. D. Eimas
Publisher : Psychology Press
ISBN 13 : 1134917422
Total Pages : 361 pages
Book Rating : 4.1/5 (349 download)
Download or read book Perspectives on the Study of Speech written by P. D. Eimas and published by Psychology Press. This book was released on 2013-05-13 with total page 361 pages. Available in PDF, EPUB and Kindle. Book excerpt: Published in the year 1982, Perspectives on the Study of Speech is a valuable contribution to the field of Cognitive Psychology.
Author : Shena Laughland Wileman
Publisher :
ISBN 13 :
Total Pages : 106 pages
Book Rating : 4.:/5 (123 download)
Download or read book Speech Intelligibility in High Noise Environments as a Function of Ear Protection written by Shena Laughland Wileman and published by . This book was released on 1975 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Alexandra MacPherson
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (141 download)
Download or read book The Factors Affecting the Psychometric Function for Speech Intelligibility written by Alexandra MacPherson and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Older listeners often report difficulties understanding speech in noisy environments. Increasing the level of the speech relative to the background - e.g. by way of a hearing aid - usually leads to an increase in intelligibility. The amount of perceptual benefit that can be gained from a given improvement in signal-to-noise ratio (SNR), however, is not fixed: it instead depends entirely on the slope of the psychometric function. The shallower the slope, the less benefit the listener will receive. The aim of the research presented in this thesis was to better understand the factors which lead to shallow slopes. A systematic survey of published psychometric functions considered the factors which affect slope. Speech maskers, modulated-noise maskers, and target/masker confusability were all found to contribute to shallow slopes. Experiment 1 examined the role of target/masker confusion by manipulating masker intelligibility. Intelligible maskers were found to give shallower slopes than unintelligible ones but subsequent acoustic analysis demonstrated that modulation differences between the maskers were responsible for this effect. This was supported by the fact that the effect was seen at low SNRs. Experiment 2 confirmed that the effects of modulation and target/masker confusion occur at different SNRs. Experiments 3 and 4 demonstrated that directing attention to the target speech could "undo" the effects of target/masker confusion. In Experiments 5 and 6 a new method was developed to study whether slope effects are relevant to "real-world" situations. The results suggested that using continuous speech targets gave shallower slopes than standard speech-in-noise tests. There was little evidence found to suggest that shallow slopes are exacerbated for older or hearing-impaired listeners. It is concluded that in the complex demands of everyday listening environments the perceptual benefit received from a given gain in SNR may be considerably less than would be predicted by standard speech-in-noise paradigms.
Author : Philipos C. Loizou
Publisher : CRC Press
ISBN 13 : 1466504218
Total Pages : 715 pages
Book Rating : 4.4/5 (665 download)
Download or read book Speech Enhancement written by Philipos C. Loizou and published by CRC Press. This book was released on 2013-02-25 with total page 715 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the proliferation of mobile devices and hearing devices, including hearing aids and cochlear implants, there is a growing and pressing need to design algorithms that can improve speech intelligibility without sacrificing quality. Responding to this need, Speech Enhancement: Theory and Practice, Second Edition introduces readers to the basic problems of speech enhancement and the various algorithms proposed to solve these problems. Updated and expanded, this second edition of the bestselling textbook broadens its scope to include evaluation measures and enhancement algorithms aimed at improving speech intelligibility. Fundamentals, Algorithms, Evaluation, and Future Steps Organized into four parts, the book begins with a review of the fundamentals needed to understand and design better speech enhancement algorithms. The second part describes all the major enhancement algorithms and, because these require an estimate of the noise spectrum, also covers noise estimation algorithms. The third part of the book looks at the measures used to assess the performance, in terms of speech quality and intelligibility, of speech enhancement methods. It also evaluates and compares several of the algorithms. The fourth part presents binary mask algorithms for improving speech intelligibility under ideal conditions. In addition, it suggests steps that can be taken to realize the full potential of these algorithms under realistic conditions. What’s New in This Edition Updates in every chapter A new chapter on objective speech intelligibility measures A new chapter on algorithms for improving speech intelligibility Real-world noise recordings (on accompanying CD) MATLAB® code for the implementation of intelligibility measures (on accompanying CD) MATLAB and C/C++ code for the implementation of algorithms to improve speech intelligibility (on accompanying CD) Valuable Insights from a Pioneer in Speech Enhancement Clear and concise, this book explores how human listeners compensate for acoustic noise in noisy environments. Written by a pioneer in speech enhancement and noise reduction in cochlear implants, it is an essential resource for anyone who wants to implement or incorporate the latest speech enhancement algorithms to improve the quality and intelligibility of speech degraded by noise. Includes a CD with Code and Recordings The accompanying CD provides MATLAB implementations of representative speech enhancement algorithms as well as speech and noise databases for the evaluation of enhancement algorithms.
Author : United States. Environmental Protection Agency
Publisher :
ISBN 13 :
Total Pages : 212 pages
Book Rating : 4.F/5 ( download)
Download or read book Public Health and Welfare Criteria for Noise written by United States. Environmental Protection Agency and published by . This book was released on 1973 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 120 pages
Book Rating : 4.E/5 ( download)
Download or read book EPA 550/9 written by and published by . This book was released on 1978 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 28 pages
Book Rating : 4.:/5 (946 download)
Download or read book The Intelligibility of Multiple Talkers Separated Spatially in Noise written by and published by . This book was released on 2001 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Speech communication are seldom isolated auditory events in quiet environments. Frequently, the desired speech signal is confounded with other speech signals and noises. Real-world environments often degrade the intelligibility of the desired speech signal. In this book chapter (Binaural and Spatial Hearing in Real and Virtual Environments, Lawrence Erlbaum Associates, Mahwah NJ, publishers, 1997), the literature on the speech intelligibility of competing messages and the masking of speech is reviewed. The literature on the detection of speech is included to describe factors that can affect speech intelligibility. Following the review, several experiments are presented in which the effects of various conflicting signals on speech communications are measured. Virtual audio over headphones is used to investigate the effects of directional separation of talkers, the quantity and gender of talkers, the degree of masker interaural correlation, masking level, and selective attention. The results are discussed and compared with the previous literature.
Author : United States. Office of Noise Abatement and Control
Publisher :
ISBN 13 :
Total Pages : 168 pages
Book Rating : 4.:/5 (31 download)
Download or read book Passenger Noise Environments of Enclosed Transportation Systems written by United States. Office of Noise Abatement and Control and published by . This book was released on 1975 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
