Download or read book Integrated Headsets Using the Adaptive Hybrid Active Noise Control Systems written by See Chiat Ting and published by . This book was released on 2005 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Integrated Headsets Using Adaptive Feedback Active Noise Control Systems written by Lee Guek Yeo and published by . This book was released on 2005 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Simplified Hybrid Active Noise Control Algorithm for Commercial Headset Applications written by Siddharth Raghunandan and published by . This book was released on 2016 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: This paper proposes a simplified hybrid adaptive feedback algorithm along with design constraints for active noise control in open-backed commercial headsets. It is physically improbable in practice to achieve complete noise cancellation, especially in open backed conditions. This inherent property suggests that the residual noise can be used as a reference signal directly to adapt a leaky feedback FxLMS algorithm. A fixed analog feedback controller is concatenated into the FxLMS system, whose design constraints are derived from existing feedback based active and passive control systems. The resulting simplified hybrid algorithm using analog elements and digital elements, provides adequate noise control of both broadband and narrowband ranges, remaining robustly stable in open-backed plant changes throughout. A lighter computational load along with ease of implementation is also accomplished. The proposed algorithm's feasibility and relative performance are compared with other variants in a simulated acoustic environment using MATLAB's Audio Stream Processing Toolbox.
Download or read book Single channel Adaptive Feedback Active Noise Control for Headsets written by Sohini Mitra and published by . This book was released on 2005 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Active Noise Control Using Adaptive Filtering written by Ram M. Vemuri and published by . This book was released on 1989 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Adaptive Active Noise Cancellation System written by Nicholas F. Wowk and published by . This book was released on 2000 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Active Noise Control written by Su-u Hwang and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book L attivit 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:
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.
Download or read book Adaptive Active Noise Control Using Multiple model Approaches written by H. D. Nam and published by . This book was released on 1992 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Active noise cancellation headset written by and published by . This book was released on with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this paper, a new design for headset with active noise cancellation capability is presented. For the proposed headset, a Variable-Step-Size Normalized Least-Mean-Square (VSS-NLMS) algorithm is adopted in the combined audio and feedback active noise cancellation system. Experimental results show that for the same set of signals, the average noise reduction using the proposed adaptive algorithms is 38dB compared with 36dB using Normalized Least-Mean-Square algorithm and 14 dB using the Least-Mean-Square algorithm. The speed of convergence using the proposed approach is also faster compared with the other two cases. Informal listening tests also favor the adoption of the proposed VSS-NLMS adaptive algorithm.
Download or read book Active Noise Cancellation Using Selective Adaptive Filtering written by Oveal Walker and published by . This book was released on 2006 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Intelligibility of speech and other audio in various acoustic environments can be very low based on the level of noise present in that space. Often in order to compensate for the noise in acoustic environments a passive approach is taken, in which sound absorption and isolation techniques are implemented throughout the physical space. Although this passive approach can provide suitable levels of noise reduction for a reasonable range of frequencies, several active noise control approaches are proven to be more effective, especially at frequencies below 500 Hz. Active Noise Control utilizes adaptive filtering algorithms to achieve significant noise attenuation of lower frequency noise that significantly degrades the desired audio signal. The level of effectiveness of various adaptive filtering algorithms can determine the overall noise attenuation and the rate at which the system attenuates the noise in the given space. Noise source location, level, and resonant space may dictate the amount of degradation caused on the input signal. Some acoustic spaces in which Active Noise Cancellation (ANC) headsets are used causes increasing resonance and inconsistent changes in noise power and amplitude. Special consideration of these signal characteristics are used to determine the stationary level of the noise signal, which is an ideal measure for determination of an adaptive filtering algorithm. Most Active Noise Control systems currently utilize only versions of the Least Mean Square adaptive filtering algorithm. This research will focus on a selective algorithm that will utilize descriptors to identify differences in the noise signal, and determine an optimal algorithm to be used for the filtering of distinct portions of the signal that are identified. The Recursive Least Squares adaptive algorithm will be used as the primary means of filtering due to its fast rate of convergence and tracking performance. A selective switching mechanism will be used to insure the Least Mean Squares algorithm is initiated only when signal conditions dictate effective noise control can be performed using this algorithm. Several different noise source environments are tested in order to attain the best active noise control solution to be used.
Download or read book Adaptive Filtering Applications written by Lino Garcia Morales and published by IntechOpen. This book was released on 2011-07-05 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt: Adaptive filtering is useful in any application where the signals or the modeled system vary over time. The configuration of the system and, in particular, the position where the adaptive processor is placed generate different areas or application fields such as: prediction, system identification and modeling, equalization, cancellation of interference, etc. which are very important in many disciplines such as control systems, communications, signal processing, acoustics, voice, sound and image, etc. The book consists of noise and echo cancellation, medical applications, communications systems and others hardly joined by their heterogeneity. Each application is a case study with rigor that shows weakness/strength of the method used, assesses its suitability and suggests new forms and areas of use. The problems are becoming increasingly complex and applications must be adapted to solve them. The adaptive filters have proven to be useful in these environments of multiple input/output, variant-time behaviors, and long and complex transfer functions effectively, but fundamentally they still have to evolve. This book is a demonstration of this and a small illustration of everything that is to come.
Download or read book Real time Remote Active Noise Control written by Sri Hari Krsihna Vemuri and published by . This book was released on 2014 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents an adaptive active noise control (ANC) method to remotely cancel multi-tone noise signals in a room using ultrasonic `AudioSpotLight' (ASL) as the noise canceling loudspeaker. The main contributions of this thesis include the use of Hybrid RLS-NLMS adaptive algorithm for real-time remote cancellation. The Hybrid algorithm combines the stable and computationally efficient Normalized Least Mean Squares (NLMS) algorithm with a fast converging yet computationally complex Recursive Least Squares (RLS) algorithm. This gives a fast converging, stable and less computationally complex Hybrid RLS-NLMS algorithm, which gives fast processing and cost-efficient solution compared to a NLMS algorithm and RLS algorithm individually. It also presents a real-time implementation of a cost-effective adaptive feedback Active Noise Control (FANC) method for attenuating acoustic multi-tone noise and functional Magnetic Resonance Imaging (fMRI) acoustic noise in an fMRI bore test-bed.
Download or read book Emerging Communication Technologies for E Health and Medicine written by Rodrigues, Joel J.P.C. and published by IGI Global. This book was released on 2012-04-30 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: According to the World Health Organisation (WHO), e-health is the combined use of electronic communication and information technology in the health sector and, moreover, it enables a safer, higher quality, more equitable, and sustainable health system. Emerging Communication Technologies for E-Health and Medicine is a fundamental source for the advancement of knowledge, application, and practice in the interdisciplinary areas of healthcare, e-health, m-health, u-health, sensors, biomedical engineering, and telemedicine. Due to its grounding in research and theory evidence, this book is designed for use in graduate courses in health management, medicine, nursing, health professionals, and medical informatics. The book can help to e-health contents, applications, and interesting experiences. It is an important way to communicate e-health concepts.
Download or read book Automatic Control Robotics and Information Processing written by Piotr Kulczycki and published by Springer Nature. This book was released on 2020-09-03 with total page 843 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a wide and comprehensive range of issues and problems in various fields of science and engineering, from both theoretical and applied perspectives. The desire to develop more effective and efficient tools and techniques for dealing with complex processes and systems has been a natural inspiration for the emergence of numerous fields of science and technology, in particular control and automation and, more recently, robotics. The contributions gathered here concern the development of methods and algorithms to determine best practices regarding broadly perceived decisions or controls. From an engineering standpoint, many of them focus on how to automate a specific process or complex system. From a tools-based perspective, several contributions address the development of analytic and algorithmic methods and techniques, devices and systems that make it possible to develop and subsequently implement the automation and robotization of crucial areas of human activity. All topics discussed are illustrated with sample applications.
Download or read book Adaptive Filtering Applications written by Lino Garcia Morales and published by BoD – Books on Demand. This book was released on 2011-07-05 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: Adaptive filtering is useful in any application where the signals or the modeled system vary over time. The configuration of the system and, in particular, the position where the adaptive processor is placed generate different areas or application fields such as: prediction, system identification and modeling, equalization, cancellation of interference, etc. which are very important in many disciplines such as control systems, communications, signal processing, acoustics, voice, sound and image, etc. The book consists of noise and echo cancellation, medical applications, communications systems and others hardly joined by their heterogeneity. Each application is a case study with rigor that shows weakness/strength of the method used, assesses its suitability and suggests new forms and areas of use. The problems are becoming increasingly complex and applications must be adapted to solve them. The adaptive filters have proven to be useful in these environments of multiple input/output, variant-time behaviors, and long and complex transfer functions effectively, but fundamentally they still have to evolve. This book is a demonstration of this and a small illustration of everything that is to come.
