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Author : Jiun-Hung Lin
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (135 download)
Download or read book Effects of Feedback Adaptive Active Noise Cancellation on Speech Intelligibility written by Jiun-Hung Lin and published by . This book was released on 2006 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book L'attività dell'industria edile in Svizzera nel 1944 written by and published by . This book was released on 1944 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Rodney Merrill Atack
Publisher :
ISBN 13 :
Total Pages : 156 pages
Book Rating : 4.:/5 (995 download)
Download or read book Improved Speech Intelligibility Using an Adaptive Noise Cancelling Technique in an Industrial Environment written by Rodney Merrill Atack and published by . This book was released on 1983 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Vladimir Malenovsky
Publisher :
ISBN 13 : 9783659255960
Total Pages : 0 pages
Book Rating : 4.2/5 (559 download)
Download or read book Adaptive Noise Cancellation in Speech Signals written by Vladimir Malenovsky and published by . This book was released on 2012-09-26 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 432 pages
Book Rating : 4.E/5 ( download)
Download or read book Proceedings of the 8th International Congress on Noise as a Public Health Problem written by and published by . This book was released on 2003 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Colin Hansen
Publisher : CRC Press
ISBN 13 : 1482234009
Total Pages : 1564 pages
Book Rating : 4.4/5 (822 download)
Download or read book Active Control of Noise and Vibration written by Colin Hansen and published by CRC Press. This book was released on 2012-11-02 with total page 1564 pages. Available in PDF, EPUB and Kindle. Book excerpt: Integrating active control of both sound and vibration, this comprehensive two-volume set combines coverage of fundamental principles with the most recent theoretical and practical developments. The authors explain how to design and implement successful active control systems in practice and detail the pitfalls one must avoid to ensure a reliable and stable system. Extensively revised, updated, and expanded throughout, the second edition reflects the advances that have been made in algorithms, DSP hardware, and applications since the publication of the first edition.
Author : Gaston Hilkhuysen
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (18 download)
Download or read book Effects of Noise Reduction on Speech Intelligibility written by Gaston Hilkhuysen and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Speech is often perceived in the presence of other sounds. At times the interfering sounds can reach such high levels that the speech becomes unintelligible. Speech enhancement methods attempt to reduce the audibility of noisy sounds, but little is known about how their influence on intelligibility. This thesis explores the effects of speech enhancement, also known as noise suppression algorithms, on speech intelligibility. After a short introduction to speech enhancement and intelligibility, three studies consider the effects from an empirical perspective. It is shown that noise suppression tends to reduce intelligibility and that its effect is mostly constant across a broad range of noise levels. When experts were asked to apply a commercial noise suppressor to optimise intelligibility, they proposed settings that degraded intelligibility. Laypeople successfully identified an increase in intelligibility resulting from speech enhancement. Three subsequent studies attempt to identify the signal properties responsible for the intelligibility effects and generated by speech enhancement.Physical metrics based on various signal properties were used to estimate the intelligibility of the speech-enhanced noisy signal. Most metrics provided unreliable or biased estimates of absolute intelligibility. Some could nevertheless be used to adjust speech enhancers such that intelligibility is optimal.
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 : Kambiz Casey Zangi
Publisher :
ISBN 13 :
Total Pages : 156 pages
Book Rating : 4.:/5 (36 download)
Download or read book Optimal Feedback Control Formulation of the Active Noise Cancellation Problem written by Kambiz Casey Zangi and published by . This book was released on 1994 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : K. C. Zangi
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (144 download)
Download or read book Optimal Feedback Control Formulation of the Active Noise Cancellation Problem written by K. C. Zangi and published by . This book was released on 1994 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unwanted noise is a by-product of many industrial processes and systems. In active noise cancellation (ANC), one introduces a secondary noise source to generate an acoustic field that interferes destructively with the unwanted noise, and thereby attenuates it. Noise reduction is important to protect listeners in high noise environments from hearing damage, to enhance speech communication, and to reduce noise-induced fatigue. These adverse effects of noise can cause accidents and reduce the productivity of workers. By formulating the ANC problem as an optimal feedback control problem, we developed a single approach for designing stochastically optimal feedback controllers for pointwise and distributed active noise cancellation. In the pointwise case, we develop an optimal feedback controller for attenuating the acoustic pressure at the locations of a finite number of microphones. In the distributed case, we develop an optimal feedback controller for attenuating the total acoustic energy in an enclosure. In either case, the controller is pointwise and is obtained as the output of an ordinary pressure microphone.
Author :
Publisher :
ISBN 13 :
Total Pages : 836 pages
Book Rating : 4.:/5 (31 download)
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 836 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Publisher :
ISBN 13 :
Total Pages : 256 pages
Book Rating : 4.3/5 (91 download)
Download or read book Noise Control Engineering Journal written by and published by . This book was released on 2000 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (946 download)
Download or read book Instrumentation for Basic Research in Communication and Hearing Protection Systems written by and published by . This book was released on 2004 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This DURIP grant supported instrumentation to perform basic research in control theory, hearing protector design, and psychoacoustics. The research is aimed at developing and evaluating hearing protection and communication systems for environments in which the user is exposed to high levels of nonstationary noise. The instrumentation provided by this grant consists of an Artificial Head Measurement System, a Low Frequency Acoustic Test Cell, a vibration isolation table, and digital signal processing equipment for rapid prototyping of active noise reduction (ANR) algorithms based on feedforward adaptive filters. During the performance period, the instrumentation directly supported graduate and undergraduate research work on hybrid ANR system and speech intelligibility metrics. Tests of hybrid ANR systems, using both feed-forward and feed-back control, were conducted using aircraft noise. The report covers the instrumentation and its costs along with the research work that it supported. Research projects included the development of a digital, hybrid ANR system using feedforward adaptive control for hearing protection. The system consists of a Lyapunov-tuned LMS filter and a digital feedback ANR system. Another project focused on the effects of speaker dynamics on ANR. This work characterized a variety of off-the-shelf speakers and evaluated the use of a filtered-X LMS filter for flattening the transfer function from the speaker to error microphone, versus using digital equalization to flatten the response. In another project, testing provided evidence that ANR improves speech intelligibility through reduction of low frequency noise. The final project dealt with the development of hearing protection for extreme noise fields. In addition to passive and active noise reduction of the air transmission path, active structural control and passive noise control through design of the helmet structure may be required to reduce bone conducted noise through the skull. (9 refs7.
Download or read book Technical Abstract Bulletin written by and published by . This book was released on 1981 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Publisher :
ISBN 13 :
Total Pages : 772 pages
Book Rating : 4.:/5 (11 download)
Download or read book Archives of Acoustics Quarterly written by and published by . This book was released on 2018 with total page 772 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 1376 pages
Book Rating : 4.3/5 (243 download)
Download or read book Cumulated Index Medicus written by and published by . This book was released on 1975 with total page 1376 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 574 pages
Book Rating : 4.:/5 (31 download)
Download or read book Sound & Communications written by and published by . This book was released on 1995 with total page 574 pages. Available in PDF, EPUB and Kindle. Book excerpt:
