61. Stewart Acoustical Consultants - Acousticians - Consultant In Acoustics, Noise C Acoustical consultants providing services in architectural acoustics, environmentalcommunity noise, and industrial-occupational noise. http://www.stewartacousticalconsultants.com

Welcome and thank you for visiting our Web Site! We provide professional Acoustical Consultant Services including noise control primarily for the architectural, environmental, and industrial workplace markets in North Carolina, southern Virginia, South Carolina and Tennessee. We help architects and engineers create more pleasant and useful environments, enhance and preserve value, reduce risk, and resolve existing problems in communities, schools, performance spaces, recreational areas, worship centers, and workplaces. This site includes a Self Help resource fulfilling a fundamental principle of the profession to help educate clients and the public about sound and the many ways it affects our lives. It includes an FAQ, printable documents on acoustics, a list of books, and Links to useful and interesting sites. Check our news page for the latest happenings We would like an opportunity to discuss your needs in more detail. After exploring the site, and learning more about us , please Contact Us New Office - New Staff - see News Member - National Council of Acoustical Consultants (By the way, it is not spelled accoustic, accoustics, accousticians, or accoustical, but perhaps that is how you found us if you did not find many other sites.)

62. Orpheus Acoustics Acoustical consultants specializing in architectural acoustics including noise and vibration control for auditoriums, churches, synagogues, and other critical listening spaces. http://www.orpheus-acoustics.com/

Projects Synagogues Performance Spaces Meeting Rooms ... Testimonials Subscribe to our Newsletter Buy the Book Acoustics in your building can be clear, supportive, intimate, and natural. As an acoustical consultant, I can help you design your new building so that people will be able to hear clearly naturally intimately . Do you want the acoustics of your space to allow dialogue and discussion ? Do you want music to sound rich natural and full Unfortunately, many spaces have dismal acoustics . Isn't that your experience? It is most certainly mine. As an acoustical consultant and violinist, I listen and play in many spaces. Most of the time I have difficulty hearing; the sound is either too loud, too soft, muddled, dry, harsh, shrill, unpleasant, unnatural. I can't hear and I can't understand. Is it possible to have a space in which the acoustics allow you to understand speech clearly, naturally, in which music is rich and compelling ? Certainly! "You are nothing short of a miracle worker.... " (click here to read more) Douglas S. Gordon WASD Music Teacher Lycoming Valley Middle School Home About Reports FAQ's ... Contact Orpheus Acoustics 925 Virginia Avenue, Lancaster, PA 17603 - USA

63. Allied Environmental Consultants Limited Offering acoustics, environmental planning engineering and pollution control services. Located in Hong Kong. http://www.aechk.com/

[News Date: 28-10-2001 The organization Allied Environmental Consultants Limited (AEC) is an independent consultancy engaged in the field of acoustics and environmental engineering. We have established offices in Hong Kong, Xian, London, Kuala Lumpur, Tokyo, Singapore, Wuhan, Perth etc. The company operates as a multi-disciplinary amalgamation of resources and the professional expertise of the organization as a whole is available to work on any particular project irrespective of its location. As a result, AEC enjoys a reputation for quality, innovation and professionalism in all aspects of its work.

64. Campanella Associates (Acoustics Consultants) The science of acoustics provides the only reliable way to measure, analyze and control sound. Unwanted sound (noise) from our everyday http://www.campanellaacoustics.com/default.htm

Feature Articles ACCULAB Reference Sound Source Instruction Manual Acoustics FAQ Articles on Acoustics Active Noise Control or Cancellation (ANC) Air System Quieting Building Acoustics Classroom Acoustics ... Ultrasonic Reference Sound Source The science of acoustics provides the only reliable way to measure, analyze and control sound. Unwanted sound (noise) from our everyday environment can be annoying or damaging because our hearing sense cannot be turned off. Modern society unintentionally produces large quantities of noise through transportation, manufacturing and recreational activities. Campanella Associates is dedicated to making the home, work, institutional and recreational environments pleasant and safe. As acoustical engineers, we provide our clients with effective methods to reduce or eliminate noise. Campanella Associates can do any of the following: acoustical design and noise isolation testing of auditoriums, churches, recording and TV studios, apartments, residential units, and open-plan offices; computer modeling of airport, highway, and railroad noise for master plans; cabin interior noise and vibration reduction by design and testing; seismic (dynamic and stress) analysis of nuclear power plant components; surveys and reporting; noise control design; expert witness testimony. Have done extensive noise and vibration testing for OSHA, Leq, DNL, IIC, and seismic mitigation recommendations for FAA, FHA and HUD compliance. Campanella Associates has a very extensive client listing Participate in joint ventures, and have

65. Charles Salter Associates A firm with a staff of over 40 based in San Francisco that provides consulting in architectural acoustics, audio/visual telecom design, engineering acoustics, environmental acoustics, forensic acoustics, expert testimony and airport noise reduction. http://www.cmsalter.com

66. Campanella Associates (Acoustics Consultants) - Classroom Acoustics Classroom acoustics. Meanwhile, steps that noise control consultants, architects, administrators and parentteacher associations in your district can take are http://www.campanellaacoustics.com/classroom.htm

Classroom Acoustics Many aspects of our busy modern times have deteriorated the classroom acoustical environment so that teaching in them is now more challenging than ever (ask any public school teacher). Whereas in the past one could create a quiet and pleasant classroom using natural ventilation, convection heating and absorbent (asbestos) ceilings one now all too frequently encounters relatively noisy and reverberant classrooms. The acoustical attributes of classrooms has been studied by the American National Standards Institute, and they have produced ANSI 12.60, as the recommended classroom acoustical standards. The general recommendation is that classrooms should be designed to have a background noise level of less than 35 dBA (less than NC-30) and a reverberation time of less than 1/2 second. In some detail, they considered the following: HVAC has advanced to the point where air conditioning has been designed into and retrofitted to many old classrooms. It is now clear that that the ideal background noise level for the teaching environment is a maximum RC/NC/NCB-25. Both address the problem of speech intelligibility across a room. Reverberation time must be reduced to 1/2 second by installing sound absorption materiel on the walls and ceiling. In previous years, sound absorption material often contained asbestos. That has all been removed or passivated. Carpet has a lesser effect on reverberation time. Its main function is to minimize surface generated noise (foot and chair scuffing). Carpeting may be targeted for removal, due to its propensity to harbor molds, .

67. AVL DESIGNS CONSULTANTS FOR ACOUSTICAL, SOUND, LIGHTING, STAGE RIGGING AND VIDEO Design firm specializing in acoustics, sound system design, theatrical lighting and rigging, and industrial noise control. http://www.avldesign.com/

AVL provides consulting and design services for acoustics, noise control, sound, recording, theatrical lighting, stage rigging, and video production. Clientele includes performing arts and theater, worship, institutional and industrial clientele. s="na";c="na";j="na";f=""+escape(document.referrer)

68. Sound Technology Consultants, Inc. acoustics, sound, theatrical lighting, and AV systems for churches, theme parks, and stadiums. http://www.sound-technology.com/

Sound Technology Consultants, Inc. We design Sound, Lighting, and AV Systems for Churches, Theme Parks, and Sports Facilities. This page uses frames, but your browser doesn't support them. Frameless Version 1935 N. Marshall Ave. El Cajon, CA vance@sound-technology.com

69. Structural Acoustics, Inc. Failure Analysis - Biomedical Engineeering - System D Engineering consultants and failure analysis experts in mechanical and biomedical engineering. Based in Raleigh, North Carolina. http://www.structuralacoustics.com/

Welcome to: structuralAcoustics.com 5540 Centerview Drive Raleigh, NC 27606 INSTRUMENTATION SYSTEM DESIGN AND TEST SPECIALISTS Telephone ....... 919-787-9675 DESIGN DEFECT AND ENGINEERING FAILURE ANALYSIS Facsimile ........ 919-881-9112 Mobile ............. 919-264-8336 E-mail: info@structuralacoustics.com Structural Acoustics, Inc. Rapid system prototyping for solutions to difficult design, failure analysis and test problems. The mission of Structural Acoustics, Inc. is to develop and advance analytical and experimental methods in the investigation of system and component failures, mechanical stress and vibration, design defects, and accident causation. The company is able to rapidly develop and implement system and component test procedures, instrumentation, and protocols to evaluate design, manufacturing, and materials. Its methods have been applied to numerous structures and devices, ranging from biomedical applications involving mechanical heart valves and pacemaker lead components weighing less than one gram, to hydroelectric turbines, aircraft, and transportation systems. Finite Element stress analysis of a mechanical heart valve outlet strut.

70. Power Acoustics, Inc. Power Industry Acoustical Consultants Acoustical consultants specializing in the power industry. Designed noise control for hundreds of combustion turbine based power plants. Developer of SPM9613 environmental noise prediction software. http://poweracoustics.com/

Acoustical Consultants Specializing in the Power Industry Power Acoustics, Inc. acoustical consultants provide quality professional acoustical consulting services including: computerized modeling, environmental and community noise impact assessments, noise control design services, ambient sound surveys, acoustic compliance measurements and analysis for all industrial applications. Power Acoustics' principal acoustical consultant, Dave Parzych , has designed noise control for hundreds of simple cycle combustion turbine (gas turbine), cogeneration and steam power plants and is committed to working closely with the power industry on turbomachinery and similar industrial noise problems. We are sensitive to our customer's need for effective low cost noise abatement in increasingly competitive markets. Our computerized acoustical design capability assures optimum noise control at the lowest costs. Also available is Version 2 of , a low cost environmental sound propagation model based on the ISO 9613 standard provides calculations of specific field points and predictions of A and C-weighted sound level contours as well.

71. CDAI - Acoustics, Audiovisual Systems, Lighting Design, Theatre Consulting consultants and designers for acoustics, architectural lighting, audio/video/control, videoconferencing, TV/broadcast, digital media, and theater technologies. http://www.cdai.com/

CDAI Integrated Technical Solutions Two Securities Centre Suite 750 3500 Piedmont Road Atlanta, Georgia 30305 Tel (404) 633-8861 Fax (404) 636-5089 Email info@cdai.com Since 1988 CDAI has provided an increasing range of services including Acoustics, Audiovisual, Lighting and Theatre services which enables us to address all relevant aspects of presentation spaces. From acoustics and lighting to the technologies themselves, we provide a comprehensive engineering approach to integrating the designs of facilities and systems. The CDAI Advantage: Unlike other firms which provide single services, our multi-disiplined approach provides you with a comprehensive range of expertise and project experience. Every project has it's challenges and our expertise helps you avoid the problems normally associated with such projects. When planning your next project, be sure to contact us early so that we can help guide you through the many facets of these complex technologies and avoid costly mistakes. We are ready to assist you in making your vision a reality. Dixson Associates Incorporated About Us Acoustics Audiovisual FAQ ... Request Information

72. NCAC : National Council Of Acoustical Consultants : Home Page of sound. And you thought acoustics was only for concert halls! Acoustical Consulting 2002 National Council of Acoustical consultants. http://www.ncac.com/

Architectural Mechanical Industrial Environmental ... Forensic Acoustics And you thought acoustics was only for concert halls! Acoustical Consulting info@ncac.com Home About NCAC Benefits of Membership ... Forensic

73. NCAC : National Council Of Acoustical Consultants : Home Page our environment. acoustics — The physical science of sound and vibration. The 2002 National Council of Acoustical consultants. http://www.ncac.com/acoustics.html

Architectural Mechanical Industrial Environmental ... Forensic And you thought acoustics was only for concert halls! Acoustics Sound Noise Acoustical Consulting info@ncac.com Home About NCAC Benefits of Membership ... Forensic

74. Hodgson & Hodgson Group Ltd Independent consultants and design advice in the fields of acoustics, noise and vibration. Includes information on services and projects. http://www.acoustic.co.uk/

Incorporating: Acoustic Design Consultants Thermal and Acoustic Insulation Specialists Professional Acoustic Consultants The material on this site may not be reproduced and may not be distributed, publicly performed, proxy cached

75. Power Acoustics, Inc. Power Industry Acoustical Consultants Power acoustics, Inc. acoustical consultants provide quality professional acoustical consulting services including computerized modeling, environmental and http://www.poweracoustics.com/

Acoustical Consultants Specializing in the Power Industry Power Acoustics, Inc. acoustical consultants provide quality professional acoustical consulting services including: computerized modeling, environmental and community noise impact assessments, noise control design services, ambient sound surveys, acoustic compliance measurements and analysis for all industrial applications. Power Acoustics' principal acoustical consultant, Dave Parzych , has designed noise control for hundreds of simple cycle combustion turbine (gas turbine), cogeneration and steam power plants and is committed to working closely with the power industry on turbomachinery and similar industrial noise problems. We are sensitive to our customer's need for effective low cost noise abatement in increasingly competitive markets. Our computerized acoustical design capability assures optimum noise control at the lowest costs. Also available is Version 2 of , a low cost environmental sound propagation model based on the ISO 9613 standard provides calculations of specific field points and predictions of A and C-weighted sound level contours as well.

76. Cavanaugh Tocci Associates, Inc. consultants in architectural acoustics, noise and vibration control, sound system design. Information on firm, staff, experience, publications. http://www.cavtocci.com/

This page uses frames, but your browser doesn't support them. cavanaugh tocci associates, inc. consultants in acoustics 327 F Boston Post Road, Sudbury, MA 01776 Architectural Acoustics Noise and Vibration Control Sound System Design Environmental Sound Assessment and Control Providing Quality Acoustical Consulting Since 1975 home about the firm staff featured projects tech topics ... webmaster

77. Campanella Associates - Acoustics FAQ acoustics FAQ. This enhanced version of the Acoustical FAQ file is provided by Campanellaacoustics.com, acoustical consultants, as a public service to foster http://www.point-and-click.com/Campanella_Acoustics/faq/faq.htm

Acoustics FAQ An informal file of typical questions and answers on acoustical topics. For global compatibility, only ASCII symbols are used. Aims: To make acoustics accessible to a wider public. To encourage cooperation within the acoustics community. Table of Contents (Key Word Index is found in Section 7.) 0] Credits (see 10]) 1] Resource Pointers 1.1 What acoustics related news groups and FAQs are there? 1.2 What World Wide Web sites are there? ... 4.5 How do I improve the noise insulation of my house/dwelling? 5] Reserved 6] Miscellaneous Questions 6.1 What is active noise control? 6.2 What causes a sonic boom? 6.3 Can you focus sound? ... 10] Composers 1] Resource Pointers *** 1.1 What acoustic related news groups and FAQs are there? news groups news:alt.sci.physics.acoustics - started by Angelo Campanella - now the principal group for discussion of acoustics topics. Ang's CV is at URL http://www.Point-and-Click.com/Campanella_Acoustics/angelo.htm news:sci.physics - general physics but occasionally acoustics related questions are posted. news:rec.audio.tech

78. Campanella Associates - ACCULAB Reference Sound Source Click Here to Return to Home Page ACCULAB REFERENCE SOUND SOURCES (TYPES RSS 101, 300, 400, 500, 600 (Ultra Power) 700 (Small Power)) AND LABORATORY TEST http://www.point-and-click.com/campanella_acoustics/rssman.htm

ACCULAB REFERENCE SOUND SOURCE INSTRUCTION MANUAL FOR REFERENCE SOUND SOURCE RSS-101, RSS 400 As Used for Laboratory and Field Noise Measurement Applications CONTENTS OF REFERENCE SOUND SOURCE MANUAL Specifications Unpacking / Acoustical Application Hemianechoic Calibration Data Packing / Shipping / Parts List ... Prices NOTE 1: DUT.PWL = DUT.SPL - RSS.SPL + RSS.CAL dB re one Picowatt. [one Picowatt = 10^(-12 watts)] Thus, sound power can be measured at all audio frequencies, typically in 1/3 octave bands separately. The Hemianechoic Calibration following shows such RSS.CAL information for a typical ACCULAB RSS 101. (The RSS101 is for use on 60 Hz alternating current common in North America. A 50 Hz unit, the ACCULAB RSS 300 is also available. 110vac and 220vac arrangements are also available) NOTE 2: In recent years, sound power measurement with the INTENSITY method has become increasingly important. ISO 9614, parts 1 and 2 now address this measuremnt. Ostensibly, it should be immune to background noise to an extent and also eliminate the need for a reference sound source. But in reality, the intensity method requires a special probe having two identical microphones, an accurate analog/digital signal processor, software algorithms that are in themselves complex and also operators not yet widely experienced in handling all of these parameters. In addition, microphone spacing must be changed at least once to measure sound power over a wide frequency range.

79. Welcome To ACIA Engineering Acoustics UK consultants providing design and measurement services in industrial noise, building design, and planning. http://www.acia-acoustics.co.uk

acia If it makes a noise, we can help... home services glossary photos ... contents ACIA is an independent firm of consulting engineers specialising in environmental noise, industrial noise, and the acoustics of buildings. Telephone Facsimile Postal address ACIA Engineering Acoustics 99 Wellington Road North Stockport England E-mail Sales and technical: ian@acia-acoustics.co.uk Contact acia with questions or comments about this web site.

80. [ DSM & Associates ] Solutions for acoustics, Sound, Audio/Visual Systems and Project Management. Assisting architects, engineers, school systems, Colleges and Universities, churches, recording studios, television and radio stations contractors. http://www.dsmassociates.com

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