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Author :
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ISBN 13 :
Total Pages : 158 pages
Book Rating : 4.:/5 (276 download)
Download or read book Objective and Subjective Evaluation of Noise Reduction Algorithms in Digital Hearing Aids written by and published by . This book was released on 2008 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 35 pages
Book Rating : 4.:/5 (724 download)
Download or read book Objective and Subjective Evaluation of Wind Noise Reduction in Digital Hearing Aids written by and published by . This book was released on 2011 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wind noise is problematic for hearing aid users who enjoy outdoor activities. Not only is it annoying, it can create distortion by overloading the microphone and masking signals that hearing aid users desire to hear. Some hearing aid manufacturers offer wind noise reduction in addition to general noise reduction (WNR + NR) for clinicians to manipulate in their software. This study compares objective and subjective measures of wind noise reduction as well as subjective measure of intelligibility obtained using various hearing aid manufacturers and noise reduction settings while HINT sentences were played in the presence of constantly generated wind. Significant differences in the subjective and objective amount of noise present and perceived speech intelligibility was found both between manufacturers and between noise reduction settings for each manufacturer. Subjectively, intelligibility and noisiness were positively correlated (r=0.74, p>.001); conditions that were perceived to be the most intelligible were the same conditions that were perceived to be the noisiest. The perception of intelligibility and noisiness depended on the interaction of hearing aid manufacturer and noise reduction setting (p.001, effect size=.77) for hearing aids with WN + NR and depended on both hearing aid manufacturer (p
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ISBN 13 :
Total Pages : 53 pages
Book Rating : 4.:/5 (112 download)
Download or read book Objective Differences Between Premium and Mid-level Digital Hearing Aids written by and published by . This book was released on 2018 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt: This ongoing study compared premium and mid-level hearing aids from major manufacturers on noise reduction and general electroacoustic characteristics. The findings of this study will contribute to the scarce independent literature evaluating currently available hearing aid technology. Measuring the overall gain reduction in response to a steady state noise can objectively test noise reduction. However, such a method does not specifically test a hearing aid's ability to reduce speech in specific narrow frequency bands. Hanline & Rout (2008) developed a set of stimuli to evaluate multichannel noise reduction algorithms more precisely. We used these stimuli to test noise reduction abilities of hearing aids. Premium and mid level digital hearing aids from four major manufacturers were obtained and programmed for mild to moderately severe sloping SNHL using the manufacturer's proprietary fitting formula. Each hearing aid was programmed for noise reduction ON and OFF with every other feature disabled (or minimized). Hearing aid programming was verified, and each hearing aid was tested twice for reliability. Three different bandwidths of steady-state noise (1/3 oct, 1 oct, 2 oct) were embedded at six different frequencies (0.5, 1, 2, and 4 kHz) resulting in 12 new stimuli. In addition, a 30 second steady state speech shaped noise was included to evaluate the attack time and overall gain reduction of each noise reduction algorithm. The findings of this study suggest that there is no difference between the noise reduction efficiency of a premium level hearing aid when compared to a mid-level instrument at reducing steady state background noise. The frequency specific data indicated that there was a significant difference in the noise reduction capabilities of a mid-level and premium level hearing instrument when the background noise included both speech and background noise, as simulated by the ICRA stimuli. ICRA stimuli was created by the International Collegium for Rehabilitative Audiology for the purpose of analyzing hearing aids, as it employs spectra shaped speech like noise (Dreschler et al., 2001). There was also a significant interaction between technology level and noise bandwidth as well as a significant main effect of noise bandwidth.
Author : Gurjit Singh
Publisher :
ISBN 13 :
Total Pages : 150 pages
Book Rating : 4.:/5 (16 download)
Download or read book Perceptual Evaluations of Noise Reduction Algorithms for Digital Hearing Aids written by Gurjit Singh and published by . This book was released on 2004 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jacob Benesty
Publisher : Springer Science & Business Media
ISBN 13 : 364200296X
Total Pages : 236 pages
Book Rating : 4.6/5 (42 download)
Download or read book Noise Reduction in Speech Processing written by Jacob Benesty and published by Springer Science & Business Media. This book was released on 2009-04-28 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: Noise is everywhere and in most applications that are related to audio and speech, such as human-machine interfaces, hands-free communications, voice over IP (VoIP), hearing aids, teleconferencing/telepresence/telecollaboration systems, and so many others, the signal of interest (usually speech) that is picked up by a microphone is generally contaminated by noise. As a result, the microphone signal has to be cleaned up with digital signal processing tools before it is stored, analyzed, transmitted, or played out. This cleaning process is often called noise reduction and this topic has attracted a considerable amount of research and engineering attention for several decades. One of the objectives of this book is to present in a common framework an overview of the state of the art of noise reduction algorithms in the single-channel (one microphone) case. The focus is on the most useful approaches, i.e., filtering techniques (in different domains) and spectral enhancement methods. The other objective of Noise Reduction in Speech Processing is to derive all these well-known techniques in a rigorous way and prove many fundamental and intuitive results often taken for granted. This book is especially written for graduate students and research engineers who work on noise reduction for speech and audio applications and want to understand the subtle mechanisms behind each approach. Many new and interesting concepts are presented in this text that we hope the readers will find useful and inspiring.
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ISBN 13 :
Total Pages : 24 pages
Book Rating : 4.:/5 (174 download)
Download or read book Ein Opfer der Jesuiten written by and published by . This book was released on 1923 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 : 9789461919694
Total Pages : 165 pages
Book Rating : 4.9/5 (196 download)
Download or read book Perceptual Evaluation of Noise Reduction in Hearing Aids written by and published by . This book was released on 2013 with total page 165 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : K. J. Horadam
Publisher : Princeton University Press
ISBN 13 : 069111921X
Total Pages : 277 pages
Book Rating : 4.6/5 (911 download)
Download or read book Hadamard Matrices and Their Applications written by K. J. Horadam and published by Princeton University Press. This book was released on 2007 with total page 277 pages. Available in PDF, EPUB and Kindle. Book excerpt: In Hadamard Matrices and Their Applications, K. J. Horadam provides the first unified account of cocyclic Hadamard matrices and their applications in signal and data processing. This original work is based on the development of an algebraic link between Hadamard matrices and the cohomology of finite groups that was discovered fifteen years ago. The book translates physical applications into terms a pure mathematician will appreciate, and theoretical structures into ones an applied mathematician, computer scientist, or communications engineer can adapt and use. The first half of the book explains the state of our knowledge of Hadamard matrices and two important generalizations: matrices with group entries and multidimensional Hadamard arrays. It focuses on their applications in engineering and computer science, as signal transforms, spreading sequences, error-correcting codes, and cryptographic primitives. The book's second half presents the new results in cocyclic Hadamard matrices and their applications. Full expression of this theory has been realized only recently, in the Five-fold Constellation. This identifies cocyclic generalized Hadamard matrices with particular "stars" in four other areas of mathematics and engineering: group cohomology, incidence structures, combinatorics, and signal correlation. Pointing the way to possible new developments in a field ripe for further research, this book formulates and discusses ninety open questions.
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ISBN 13 :
Total Pages : 850 pages
Book Rating : 4.F/5 ( download)
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2008 with total page 850 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : David Suelzle
Publisher :
ISBN 13 :
Total Pages : 258 pages
Book Rating : 4.:/5 (17 download)
Download or read book Electroacoustic and Behavioural Evaluation of Hearing Aid Digital Signal Processing Features written by David Suelzle and published by . This book was released on 2013 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern digital hearing aids provide an array of features to improve the user listening experience. As the features become more advanced and interdependent, it becomes increasingly necessary to develop accurate and cost-effective methods to evaluate their performance. Subjective experiments are an accurate method to determine hearing aid performance but they come with a high monetary and time cost. Four studies that develop and evaluate electroacoustic hearing aid feature evaluation techniques are presented. The first study applies a recent speech quality metric to two bilateral wireless hearing aids with various features enabled in a variety of environmental conditions. The study shows that accurate speech quality predictions are made with a reduced version of the original metric, and that a portion of the original metric does not perform well when applied to a novel subjective speech quality rating database. The second study presents a reference free (nonintrusive) electroacoustic speech quality metric developed specifically for hearing aid applications and compares its performance to a recent intrusive metric. The non-intrusive metric offers the advantage of eliminating the need for a shaped reference signal and can be used in real time applications but requires a sacrifice in prediction accuracy. The third study investigates the digital noise reduction performance of seven recent hearing aid models. An electroacoustic measurement system is presented that allows the noise and speech signals to be separated from hearing aid recordings. It is shown how this can be used to investigate digital noise reduction performance through the application of speech quality and speech intelligibility measures. It is also shown how the system can be used to quantify digital noise reduction attack times. The fourth study presents a turntable-based system to investigate hearing aid directionality performance. Two methods to extract the signal of interest are described. Polar plots are presented for a number of hearing aid models from recordings generated in both the free-field and from a head-and-torso simulator. It is expected that the proposed electroacoustic techniques will assist Audiologists and hearing researchers in choosing, benchmarking, and fine-tuning hearing aid features.
Author : Thomas Rohdenburg
Publisher :
ISBN 13 :
Total Pages : 194 pages
Book Rating : 4.:/5 (551 download)
Download or read book Development and Objective Perceptual Quality Assessment of Monaural and Binaural Noise Reduction Schemes for Hearing Aids written by Thomas Rohdenburg and published by . This book was released on 2008 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: People with hearing impairment have great difficulties communicating in noisy and reverberant environments. They usually require a higher signal-to-noise ratio (SNR) to achieve the same listening performance as normal hearing people. The current dissertation addresses this difficulty with the development of novel binaural noise reduction schemes for hearing aids and their evaluation under realistic conditions. Particular consideration is given to influences of head shadow and diffraction, head movements, microphone properties, and the preservation of binaural information. The algorithms are evaluated using novel objective measures based on recent knowledge of the auditory system and by subjective listening tests. From the results it is expected that both, the algorithms and objective assessment methods, will prove to be beneficial for human communication in noise in the future. engl.
Author : Lena Wong
Publisher : Plural Publishing
ISBN 13 : 1597565989
Total Pages : 363 pages
Book Rating : 4.5/5 (975 download)
Download or read book Evidence-Based Practice in Audiology written by Lena Wong and published by Plural Publishing. This book was released on 2012-02-21 with total page 363 pages. Available in PDF, EPUB and Kindle. Book excerpt: Evidence based practice (EBP) has proponents in all areas of healthcare and was endorsed in a technical report in 2004 and a position statement in 2005 by the American Speech-Language-Hearing Association. Despite this, there is no text on EBP with specific application to audiology. It is particularly important in audiology, where there are various interventions to assist people with hearing impairment and a growing body of research evidence that needs to be appraised by clinicians and researchers. This comprehensive book describes the principles of EBP as they apply to the evaluation of audiologic interventions in children and adults. The reader will learn the process of EBP, as well as gain knowledge on the evidence relating to specific interventions. Evidence Based Practice in Audiology is divided into four sections. The first section describes principles of EBP, including how to evaluate evidence and how to facilitate evidence based decisions with clients. The remaining three sections provide a discussion of the best available evidence about hearing aids, cochlear implants, and other interventions. These three sections contain chapters written by leading international authors who summarize the best available evidence, highlight where further evidence is needed, and recommend how further evidence should be collected and applied in the clinic. The book ends with an appendix that contains recommended measures for the collection of evidence about different audiologic interventions. Evidence Based Practice in Audiology is a highly valued resource for students, researchers, clinical audiologists, other health professionals and policy makers. For students, the book can be used for learning about research methods and about outcomes of interventions for children and adults with hearing impairment. For researchers, the book provides a useful summary of available research on important topics in habilitation and rehabilitation and may assist them to design future research studies. For clinical audiologists, the book can help them understand what evidence is and how this can be applied in clinical practice. Other health professionals who can benefit from this book include ENTs, pediatricians, geriatricians, GPs, nurses, and aged care workers. The book can also guide policy makers and third-party payers in their decisions about allocation of resources. The text is written with sufficient information for readers with different backgrounds and experience and careful attention has been paid to presenting complex information in an easy to understand format. Evidence Based Practice in Audiology is edited by two leading academics in research in audiologic interventions. These editors have a rich clinical experience working with children and adults with hearing impairment and with other health professionals
Author : Michael M Paparella
Publisher : Jaypee Brothers Medical Publishers
ISBN 13 :
Total Pages : 1066 pages
Book Rating : 4./5 ( download)
Download or read book Paparella's Otolaryngology: Head & Neck Surgery written by Michael M Paparella and published by Jaypee Brothers Medical Publishers. This book was released on with total page 1066 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Mark Marzinzik
Publisher :
ISBN 13 : 9783826585135
Total Pages : 132 pages
Book Rating : 4.5/5 (851 download)
Download or read book Noise Reduction Schemes for Digital Hearing Aids and Their Use for the Hearing Impaired written by Mark Marzinzik and published by . This book was released on 2001 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jorge I. Marin
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (825 download)
Download or read book Robust Binaural Noise-reduction Strategies with Binaural-hearing-aid Constraints written by Jorge I. Marin and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of the dissertation research is to investigate noise reduction methods for binaural hearing aids based on array and statistical signal processing and inspired by a human auditory model. In digital hearing aids, wide dynamic range compression (WDRC) is the most successful technique to deal with monaural hearing losses. This WDRC processing is usually performed after a monaural noise reduction algorithm. When hearing losses are present in both ears, i.e., a binaural hearing loss, independent monaural hearing aids have been shown not to be comfortable for most users, preferring a processing that involves synchronization between both hearing devices. In addition, psycho-acoustical studies have identified that under hostile environments, e.g., babble noise at very low SNR conditions, users prefer to use linear amplification rather than WDRC. In this sense, the noise reduction algorithm becomes an important component of a digital hearing aid to provide improvement in speech intelligibility and user comfort. Including a wireless link between both hearing aids offers new ways to implement more efficient methods to reduce the background noise and coordinate processing for the two ears. This approach, called binaural hearing aid, has been recently introduced in some commercial products but using very simple processing strategies. This research analyzes the existing binaural noise-reduction techniques, proposes novel perceptually-inspired methods based on blind source separation (BSS) and multichannel Wiener filter (MWF), and identifies different strategies for the real-time implementation of these methods. The proposed methods perform efficient spatial filtering, improve SNR and speech intelligibility, minimize block processing artifacts, and can be implemented in low-power architectures.
Author : National Academies of Sciences, Engineering, and Medicine
Publisher : National Academies Press
ISBN 13 : 0309439264
Total Pages : 325 pages
Book Rating : 4.3/5 (94 download)
Download or read book Hearing Health Care for Adults written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2016-10-06 with total page 325 pages. Available in PDF, EPUB and Kindle. Book excerpt: The loss of hearing - be it gradual or acute, mild or severe, present since birth or acquired in older age - can have significant effects on one's communication abilities, quality of life, social participation, and health. Despite this, many people with hearing loss do not seek or receive hearing health care. The reasons are numerous, complex, and often interconnected. For some, hearing health care is not affordable. For others, the appropriate services are difficult to access, or individuals do not know how or where to access them. Others may not want to deal with the stigma that they and society may associate with needing hearing health care and obtaining that care. Still others do not recognize they need hearing health care, as hearing loss is an invisible health condition that often worsens gradually over time. In the United States, an estimated 30 million individuals (12.7 percent of Americans ages 12 years or older) have hearing loss. Globally, hearing loss has been identified as the fifth leading cause of years lived with disability. Successful hearing health care enables individuals with hearing loss to have the freedom to communicate in their environments in ways that are culturally appropriate and that preserve their dignity and function. Hearing Health Care for Adults focuses on improving the accessibility and affordability of hearing health care for adults of all ages. This study examines the hearing health care system, with a focus on non-surgical technologies and services, and offers recommendations for improving access to, the affordability of, and the quality of hearing health care for adults of all ages.
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Publisher :
ISBN 13 :
Total Pages : 360 pages
Book Rating : 4.:/5 ( download)
Download or read book Journal of the American Academy of Audiology written by and published by . This book was released on 2009 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
