41. 100 Computer Music Journal Scott D. Snyder Active Noise Control Your browser may not have a PDF reader available. Google recommends visiting our text version of this document. http://muse.jhu.edu/journals/computer_music_journal/v026/26.1place.pdf

42. Active Noise Control Of Stageloader Noise In Longwall Mining With the largescale mechanization inherent to the mining industry, noise-induced hearing loss remains a major concern. As part of on-going efforts to http://stinet.dtic.mil/oai/oai?verb=getRecord&metadataPrefix=html&identifier=ADA

43. Active Noise Control Algorithms With Reduced Channel Count And Their Stability A In narrowband active noise control systems, the dimension of the quiet zone around each error sensor is proportional to the wavelength of the noise being http://portal.acm.org/citation.cfm?id=1330762.1330812&coll=GUIDE&dl=&CFID=126949

44. Session FH - Turbulence And Instability Control II. FH.007 A Biomimetic Propulsor for active noise control. The alteration of radiated noise in underwater propulsors using biomimetic active control is http://flux.aps.org/meetings/YR00/DFD00/abs/S880.html

Previous session Next session Session FH - Turbulence and Instability Control II. ORAL session, Monday morning, November 20 Bunker Hill, Hyatt Regency Capitol Hill [FH.001] Turbulent drag reduction by traveling waves Vasileios Symeonidis, Yiqing Du, George Em. Karniadakis (Brown University) Direct numerical simulation of wall-bounded flow reveal that turbulence production can be suppressed by the action of a transverse traveling wave. Flow visualizations show that the near-wall streaks are eliminated, in contrast to other turbulence control techniques, leading to a large amount of shear stress reduction (i.e. more than 30%) ( Science, vol. 288, p. 1230, 2000). In this presentation, we discuss new results related to the type of the force, and the effects of amplitude, frequency, wavelength, and penetration length on the amount of drag reduction. [FH.002] Advances in Tangentially Actuated Boundary Control of 2D Channel Flow Andras Balogh, Miroslav Krstic (Department of MAE, University of California, San Diego) [FH.003]

45. An Active Noise Control System Based On Simultaneous Equations Method Without Au A simultaneous equations method is one of active noise control algorithms without estimating an error path. This algorithm requires identification of a http://ietfec.oxfordjournals.org/cgi/content/abstract/E89-A/4/960

@import "/resource/css/hw.css"; @import "/resource/css/ietfec.css"; Skip Navigation Oxford Journals Contact Us My Basket ... Volume E89-A, Number 4 Pp. 960-968 IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences 2006 E89-A(4):960-968; doi:10.1093/ietfec/e89-a.4.960 This Article Full Text (PDF) References Alert me when this article is cited ... Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Add to My Personal Archive ... Request Permissions Google Scholar Articles by MUNEYASU, M. Articles by HINAMOTO, T. Search for Related Content Special Section on Selected Papers from the 18th Workshop on Circuits and Systems in Karuizawa Papers An Active Noise Control System Based on Simultaneous Equations Method without Auxiliary Filters Mitsuji MUNEYASU Osamu HISAYASU Kensaku FUJII and Takao HINAMOTO Presently, with Mitsubishi Engineering, Co. Ltd. A simultaneous equations method is one of active noise control algorithms without estimating an error path. This algorithm

46. An Examination Of 'smart' Foams For Active Noise Control It is also known that active noise control systems do not typically work well at high frequency due to the increasing order of the physical system model and http://docs.lib.purdue.edu/dissertations/AAI9540251/

HOME DISSERTATIONS Home Help ... Purdue Libraries Search An examination of 'smart' foams for active noise control Edward Ray Green Date: 1995 Advisor: J. Stuart Bolton Download the dissertation (PDF format) Tell a colleague about it. Printing Tips : Select "print as image" in the Acrobat print dialog if you have trouble printing. Click here to log in to our proxy server for access to this dissertation. After logging in, click "Download the dissertation" above. Abstract It is well known that acoustic foams are good high frequency sound absorbers but poor low frequency sound absorbers. It is also known that active noise control systems do not typically work well at high frequency due to the increasing order of the physical system model and increased computational demands. Therefore, it is sometimes necessary to use both passive and active systems in combination. In this thesis, the use of the passive absorber (acoustic foam) as the secondary sound source for an active noise control system is examined. The combination of the passive and active noise control systems should provide space and weight savings. Potential applications include aircraft and automobiles. Simple analytical models are used here to examine several basic 'smart' foam configurations to determine the effects of foam thickness and actuator location. More complicated analytical models using spatial Fourier series representations of the sound fields are then used to model more practical 'smart' foam features. Models are presented for foam backed, perforated panels. One of these models has been used to calculate the random incidence absorption coefficients for a foam backed, perforated panel.

47. Books - Active Noise Control Primer - 9780387989518 Buy active noise control Primer Price Range $66.93 - $108.95 from 5 sellers. http://www.pricegrabber.com/search_getprod.php/isbn=9780387989518

Go back to home page Login Register Your Lists ... Valentine's Day Guide SHOP FOR IN All Products Appliances Auto Parts Books Cameras Clothing Computers Electronics Furniture Indoor Living Magazines Movies Music Musical Instruments Office Outdoor Living Software Sporting Goods Toys Video Games SEARCH Sell Yours Save Product to Your List(s) (Javascript required) Set Price Alert Active Noise Control Primer (English) (ISBN: 9780387989518) Price range: $66.92 (Refurb) - $67.60 from 4 Sellers Publisher: Springer Verlag Format: Hardcover MSRP: $ 79.95 Synopsis: Not Available User Reviews Not Rated Write a Review Compare Prices Book Details New (1 Seller for $66.92) View All Conditions Enter Zip Code* Seller Price (USD) Tax* Shipping* BottomLinePrice* Availability Seller Rating Tower.com Merchant Info No Tax Free Your Best Price In Stock 30 Reviews Alibris Merchant Info No Tax In Stock 373 Reviews Amazon.com Marketplace Merchant Info No Tax See Site See Site In Stock Fewer than 10 reviews Enter Zip Code* * Enter your zip code above to get the best price for delivery in your area including shipping and tax. Shipping costs are based on an estimate of UPS ground or equivalent carrier within the contiguous US, excluding Alaska and Hawaii. Please see Seller's website for actual shipping costs.

48. Complex Systems: MMSE active noise control has applications for communication headsets, hearing protection systems, and hearing aids. These applications blend mechatronics—the http://engineering.dartmouth.edu/research/complex-systems/MMSE.html

Home About Thayer School Undergraduate Studies Graduate Studies ... Support Thayer School SEARCH Thayer Internal Resources Dartmouth Home Page Site Map Contact Us On This Page Active noise control Cooperative control of multi-robot systems Directional recrystallization processing Iterative learning control ... Terrain identification In this section Complex Systems BBCEE ECEEP MMSE Related Links Special Symposia: A 3-part series home research complex-systems Complex Systems: MMSE Active projects in with applications for complex systems: Active noise control (Faculty contact: Ray Cooperative control of multi-robot systems focuses on modeling and control of groups of high-speed mobile robots while accommodating communication latencies and nonlinear vehicle dynamics. In distributed cooperative control, robots communicate information about their state to each other; communication latencies and error depends on the amount of information communicated and the number of robots. We are developing distributed control system modeling and design tools that seek to maximize control bandwidth for a given information set. These tools will also assist in assessing the value of information transmitted in maintaining stability and performance of group dynamics. Both potential function path planning and control and predictive control methods are being developed. (Faculty contacts: Ray Phan See also Interacting micro-robots Directional recrystallization processing of a variety of materials involves both experiments and computer-based simulations. The work aims to relate processing conditions to the initial microstructure in order to predict, and ultimately to control, microstructural evolution.

49. (WO/1999/032356) ACTIVE NOISE CONTROL SYSTEM FOR A HELICOPTER An active noise control system (12) for a helicopter (10) for minimizing undesirable acoustic noise in a cabin (14, 15), wherein said noise is generated by http://www.wipo.org/pctdb/en/wo.jsp?wo=1999032356

50. Office Of Industry And Innovation - Active Noise Control Led By Dr Roshun Paurobally, a team of engineers has developed an active noise control system for reducing the ambient noise levels in heavy earth moving http://www.oii.uwa.edu.au/innovations/physical_sciences/active_noise_control

Office of Industry and Innovation Prospective Students Current Students Staff Alumni ... About Search UWA UWA Website This Sub-site People UWA Expertise Structure Intranet for Home Researchers Innovations Biotechnology and Biome... ... Links Active Noise control Led By Dr Roshun Paurobally, a team of engineers has developed an active noise control system for reducing the ambient noise levels in heavy earth moving vehicles. Supported by Alcoa, this research resulted in a successful demonstrator that significantly reduced the low-frequency noise levels experienced by crews of large vehicles used extensively in the resources sector. Working long shifts under adverse conditions, operators were finding that employees were becoming tired, were easily distracted and starting to make mistakes. As well as the obvious health concerns, operators were seeing increased accident / incidence rates and a drop off in productivity. The research team has developed a sophisticated, multi-channel active noise control system which provides a substantial reduction in the ambient noise levels in the target frequency range. Whilst active noise control is not new, most applications require the user to wear a headset. The innovative aspect here is that the users do not have to wear headsets, making its application in industrial environments much more appealing. The next step is to optimise the Digital Signal Processing (DSP) modules and cost reduce the current system to generate an economically-priced product. As well as having applications in multi-spectral, multi-channel environments, the research group is looking to adapt the technology to simpler, single-channel applications. As an example, a single channel system could be used to significantly reduce the ambient noise levels resulting from an air conditioning duct, swimming pool pump or similar.

51. Active Noise Control In A Duct Using Active Acoustic Conductances An approach is developed based on the equivalent circuit description for active noise control in ducts using active acoustic conductances (AACs) in http://adsabs.harvard.edu/abs/1990nce.....2.1277T

Sign on SAO/NASA ADS Physics Abstract Service Find Similar Abstracts (with default settings below Also-Read Articles Reads History Translate This Page Title: Active noise control in a duct using active acoustic conductances Authors: Affiliation: AA(Tokyo Metropolitan University, Japan), AB(Nishiwaki Laboratory, Tokyo, Japan) Publication: IN: Inter-noise 90; Proceedings of the International Conference on Noise Control Engineering, Goteborg, Sweden, Aug. 13-15, 1990. Vol. 2 (A92-39042 16-71). Poughkeepsie, NY, Noise Control Foundation, 1990, p. 1277-1280. Publication Date: Category: Acoustics Origin: STI NASA/STI Keywords: ACOUSTIC DUCTS, ACTIVE CONTROL, CONTROLLERS, EQUIVALENT CIRCUITS, NETWORK ANALYSIS, NOISE REDUCTION, ACOUSTIC ATTENUATION, CONTROL SYSTEMS DESIGN, SILENCERS, SOUND PROPAGATION Bibliographic Code: Abstract An approach is developed based on the equivalent circuit description for active noise control in ducts using active acoustic conductances (AACs) in combination with passive silencers. The tight coupled monopole (TCM) is employed for active silencing, and its use is analyzed in the two-port duct model of sound propagation. The attenuation characteristics of the active noise-control systems are determined with specific treatment given to the effects of termination and passive silencing elements. The application of AAC to active noise control is demonstrated for a multiple AAC system and an AAC-mounted passive silencer system. The TCM is equivalent to an AAC, and AACs can be mounted at specific locations within a duct system to improve attenuation characteristics by mitigating the effects of reflections in the duct. The use of AACs in conjunction with passive silencers provides good sound attenuation as demonstrated in the two-port representation of acoustic filters.

52. Cumulative Subject Index To Noise Control Engineering Journal 38 Special treatments (including active noise control) Active control of lowfrequency broadband jet engine exhaust noise, Jerome P. Smith, http://users.aol.com/inceusa/indxncej.html

Cumulative Subject Index to Noise Control Engineering Journal (with links to abstracts) This is the cumulative subject index for Volumes 42 (1994), 43 (1995), and 44 (1996) of Noise Control Engineering Journal. The papers are arranged according to the INCE Classification of Subjects. A summary of the classification is given below. For more details, refer to: Classification of Subjects in noise control engineering Below each link in the classifications below is a brief description of the material in each section of the classification General Subjects 00 General 01 International INCE 02 International INCE (continued) 03 International INCE (continued) 04 International INCE (continued) 05 Publications (other than technical articles) 06 History and philosophy 07 Education 08 Noise programs 09 Definitions and descriptors Emission: Noise Sources (noise generation and control) 10 General 11 Noise-generating devices (including components and subassemblies) 12 Stationary noise sources 13 Moving noise sources 14 Specialized industrial machinery and equipment Physical Phenomena 20 General 21 Physical mechanisms of noise generation 22 Natural sources of noise 24 Sound propagation in the atmosphere 25 Sound propagation in enclosed spaces 26 Sound propagation in ducts Noise Control Elements (for path noise control) 30 General 31 Barriers and screens, shielding

53. Applied Acoustics - Active Noise Control Welcome to the course page of active noise control. 070227 Deadline for the lab report is 19/3 First Test of Fan active noise control (ANC) Completed http://www.ta.chalmers.se/education.php?page=cpg_anc

54. ENGINEERING ANALYSIS INC. ACTIVE NOISE CONTROL The study has involved fractional calculus applied to active broadband noise control. Noise processes with regular or rational spectra can be adequately http://www.mindspring.com/~eai/EAInoise.html

ENGINEERING ANALYSIS INC. ACTIVE NOISE CONTROL The study has involved fractional calculus ANFRAC program was developed. The study demonstrates that an adaptive filter based on fractional calculus for active broad-band noise control is clearly feasible. Welcome Page Background Information Software Customers ... Feedback

55. BOTW Directory - Science > Technology > Acoustics, Ultrasound And Vibration > Ac active noise control information at your fingertips. Find it here. A comprehensive listing of online publications and websites about environmental http://botw.org/top/Science/Technology/Acoustics,_Ultrasound_and_Vibration/Activ

Directory Submit Site Free Advertising Sign In ... Sponsor This Category Free for 60 Days - Customize your message and appear alongside search results. Start your Free Trial today! Top: Science: Technology: Acoustics,_Ultrasound_and_Vibration: ... Submit Site Category Description: Access information for companies specializing in active noise control measures along with answers to frequently asked questions about active noise control. Features soundproofing techniques, vibration and motion control materials, as well as research and product development data. Active Noise Control FAQ - Answers to common inquiries on the operation and properties of noise and vibration control using basic physics theories. Bosco Italia SPA - Industrial noise specialist conducting studies to build equipment that can control noise generation and soundproofing techniques. Lord Corporation - Manufacturing facilities built to supply vibration and motion control materials as well as coatings and adhesives for industrial and other consumer applications. Signal Systems Corporation - ANC - Commercial technology developer involved in cancellation techniques for massive noise.

56. NRC Aerospace: Active Noise Control IAR has developed expertise in the field of active noise control. The areas of activity include the use of reciprocal and direct techniques for the http://iar-ira.nrc-cnrc.gc.ca/smpl/smpl_7a_e.html

@import url(/styles/percent.css); Search All NRC This site Materials and Structural Testing and Evaluation Processing of Materials and Composites Experimental Stress Analysis Computational Structural Analysis ... Aeroacoustics and Structural Dynamics Active Noise Control IAR has developed expertise in the field of active noise control. The areas of activity include the use of reciprocal and direct techniques for the measurement of sound transmission through structures, vibro-acoustic modelling of structures, and active noise control using piezoelectric actuators. Full-scale experiment on active noise control Activities in active noise control are focused on noise reduction in aircraft. Experiments are underway on a full-scale aircraft fuselage to verify computer models developed for predicting both open and closed loop sound pressure levels in an aircraft cabin. In the experiments, control algorithms, including adaptive schemes, are implemented in real time using discrete time compensator models and a PC with an analog I/O data acquisition and control board. The use of piezoelectric actuators allows for a reduction in both acoustic noise and structural vibration. Research and development work with Canadian industry has been ongoing for a number of years in the area of noise transmission and control for turboprop aircraft with such collaborators as de Havilland. Plans are underway for a flight test verification.

57. A "New" Approach To Active Noise Control In Ducts STATUS in Active Control of Vibration and Noise, ASME Vol. DE, pp. 2536 (presented at the Active Control of Vibration and Noise Symposium, ASME ICE, Nov. http://www.ecs.umass.edu/mie/labs/dacs/approach.html

DACS Home Projects Mission Research Topics ... UMass Amherst TITLE: A "New" Approach to Active Noise Control in Ducts AUTHORS: Mehta, P., Zheng, Y., Chait, Y., and Hollot, C.V. STATUS: in Active Control of Vibration and Noise, ASME Vol. DE, pp. 25-36 (presented at the Active Control of Vibration and Noise Symposium, ASME ICE, Nov. 17-22, 1996). DATE OF ENTRY: November 07, 1996 full paper (postscript, 98KB) accompanying figures (postscript file, 1,097KB) Zip file (147KB) Back to DACS Laboratory Last Updated: January 26, 2001 chait@ecs.umass.edu

58. About EZ-ANC The EZANC II makes the field of active noise control accessible to engineers, architects, researchers, consultants and product designers. http://www.causalsystems.com/htm/ezancoverview.htm

59. Active Noise Control System Using National Instruments LabVIEW And CompactRIO - A flexible active noise control system requires accurate signal acquisition, generation, synchronization and powerful realtime signal processing capability http://digital.ni.com/worldwide/singapore.nsf/web/all/984C246D31EA19868625737700

Cart Help document.write(''); ASEAN Region Local Events NIDays Training Courses ... Asia/Pacific Active Noise Control System Using National Instruments LabVIEW and CompactRIO 2007 ASEAN Virtual Instrumentation Applications Contest Submission Author(s): Wang Liang, Graduate Student (Phd Candidate) Gan Woon Seng,Senior Lecturer Chua Chong Hua Academic Institution: School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore Products Used: NI LabVIEW Professional 8.0 NI PCI-4472 8-Channel Dynamic Signal Acquisition Board NI CompactDAQ Chassis NI 9263 CompactRIO 4-Channel Analog Output Module The Challenge: A flexible active noise control system requires accurate signal acquisition, generation, synchronization and powerful real-time signal processing capability. The Solution: Using National Instruments signal acquisition and output modules, chassis, and LabVIEW software to design a flexible test system based on desktop or notebook PC to perform various active noise control experiments. Abstract: The aim of this project is to implement active noise control (ANC) system on a real-time processing platform. PC based National Instruments LabVIEW environment is chosen due to its flexible, easy and fast to develop, which is especially preferable for research and prototyping. Under this setup, various experiments tested the behavior of the Filtered-x LMS (FXLMS) adaptive algorithm when applied to active noise control in an enclosed area. The quality attenuations of noises are acquired to verify the theoretical predictions and performances of FXLMS ANC.

60. Institute Of Noise Control Engineering USA 5423658 active noise control using noise source having adaptive resonant 5321759 active noise control system for attenuating engine generated noise http://www.inceusa.org/patent.sample.asp

INCE USA International INCE INCE Foundation Membership Information ... Member App. (.pdf) Sustaining Members Publications Technical Activities Reduced First-Year Dues USA $50 International $75 Students are always $20 Announcements ... Change of Address Sample listing of patents related to noise and vibration Patent number, followed by description. Active vibration control system Method and apparatus for absorbing resonance vibration in a leaf spring in a suspension system Active vibration control through sensing and controlling forces on an intermediate body Dual bandpass secondary source Delayed resonators as active dynamic absorbers System for supressing engine exhaust noise Serpentine noise barrier Active vibration damper Muffler with catalytic converter arrangement; and method Noise attenuating internal combustion engine air intake system Active noise control using noise source having adaptive resonant frequency tuning through variable ring loading Panel shaped element specifically for sound absorbing structures and a sound absorbing installation Vibration isolation mounting system Active acoustic attenuation system with indirect error sensing Method and apparatus for acoustical partition Apparatus for reducing noise in space applicable to vehicle passenger compartment Acoustical door Rotatable machine component with device for reducing acoustic vibrations Noise attenuation panel Sectional acoustical barrier wall system

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z

Page 3     41-60 of 75    Back | 1  | 2  | 3  | 4  | Next 20