Note: this page does not give any special user information or updates. The URL of a special page for users (updates, tools, loudspeaker data, absorption data, HRTFs, an FAQ etc.) can be found in the installed readme.txt file and for versions > v8.0c3 on the Help | About dialog.
[Adrian James Acoustics] [Acentech] [ALTERNATIVE] [AMS Acoustics] [AREP] [ARUP] [AVLS] [Audio Data Lab] [Bauphysik 5] [Chalmers] [CHRG] [Clarity] [University of Colorado ] [Duran Audio] [Emil Berliner Studios] [Environmental Acoustics, Inc.] [Harris Grant Associates] [Hilson Moran] [Griesinger] [Lake] [LBP] [Level Acoustics] [LIMSI] [NASA] [NTNU] [NTUST] [PTB] [Rahe-Kraft GbR] [Rensselaer Polytechnic Institute (RPI)] [Sonus] [Sound Space Design] [SRL] [Talaske] [WCL] [Wenger] [WSP Akustik] [ÅF-Infrastructure AB]
Adrian James Acoustics
is a fully independent consultancy specialising in buildings for
the arts and for education. The practice combines the technical facilities
normally associated with large companies with the flexibility, speed
and economy of a small specialist consultancy. Their aim is to assist
in the design and refurbishment of acoustically excellent buildings within
the limited budgets often available for such projects. AJA are also UK and Ireland distributors.
|four sample models|
AREP, a multi-disciplinary
engineering and consulting firm, designs and builds public
spaces, urban transport centers and exchange hubs. AREP
makes its competences available to carriers, decision-makers
and investors in different sectors through its 9 departments :
In its building engineering department, AREP has developed an expertise in the field of acoustics and especially :
In many cases, these studies are carried out simultaneously in order to provide passengers with acoustic comfort and to guarantee the quality and the intelligibility of the messages emitted. The acoustic behavior of the spaces and the efficiency of the sound systems viewed are simulated with CATT-Acoustic, auralization being a useful aid in the final decision taken by the customer.
Major projects :
|Lille Flandres train station|
|Restored Jazz/Dance hall Nalen + Musical arena Cirkus|
|University auditorium Karlsruhe|
Chalmers Room Acoustics Group was active in room acoustic prediction and auralization since the early eighties. CATT-Acoustic was developed while the author was a part-time Ph.D. student and member of the group. Some published papers regarding some of the prediction and auralization methods applied, rather than the software itself, are in reverse chronological order:
Virtually Everywhere, B.-I. Dalenbäck, 100th AES
Conv.preprint 4228 (1996);
Room Acoustic Prediction Based on a Unified Treatment of Diffuse and Specular Reflection, B.-I. Dalenbäck, JASA 100 (August 1996);
This article describes
the basic principles of TUCT™ algorithm 2 and 3 in CATT-Acoustic™ with varying degrees of deterministic
diffuse ray split-up but was rewritten from scratch taking advantage of
the much faster mulit-core PCs 15 years later. Major differences to the
method described in the article are: 1) natural reflection growth is now
inherent in the algorithms and the late part energy no longer needs to be
extrapolated, 2) the IRs for auralization are no longer created from
octave-band echograms but are created directly, reflection by reflection,
during prediction (no post-processing necessary). Algorithm 1 (the "work
horse") is based
on the same overall principles but with random specular/diffuse
refections, can be said to be a more general version of the Randomized Tail-corrected
Cone-tracing (RTC) in v7 and v8 especially regarding auralization.
Narrowing the Gap Between Virtual Reality and Auralization, B.-I. Dalenbäck, D. McGrath, Proc. 15th ICA, 429-432 (1995);
Room Acoustic Prediction and Auralization Based on a Unified Treatment of Diffuse and Specular Reflection, B.-I. Dalenbäck, Proc. 15th ICA, 425-428 (1995);
The Importance of Diffuse Reflection in Computerized Room Acoustic Prediction and Auralization, B.-I. Dalenbäck, Proc. IOA 17, 24-34 (1995);
A Macroscopic View of Diffuse Reflection, B.-I. Dalenbäck, M. Kleiner, P. Svensson, JAES 42, 793-807 (1994);
of Changes in Geometric Shape, Source Directivity, and Absorptive
Treatment - Experiments in Auralization, B.-I. Dalenbäck,
M. Kleiner, P. Svensson, JAES 41(11), 905-913 (1993);
Auralization - an Overview, M. Kleiner, B.-I. Dalenbäck, P. Svensson, JAES 41(11), 861-875 (1993);
Prediction and Auralization Based on a Combined Image Source/Ray- Model, B.-I. Dalenbäck, P. Svensson, M. Kleiner, Proc. 14th ICA, F2-7 (1992)
Clarity provides acoustics and vibrations expertise in the development of architectural projects. Clarity is based in paris, France. Our scope of operations is on both national and international scale.
Inhouse use for experiments with the Intellivox and Target series DSP-controlled line arrays using the DDI.
various recording techniques.
Psychoacoustic research: Spatial Auditory Display Laboratory. Using CATT-Acoustic for evaluating room acoustic thresholds, speech intelligibility in enclosures, and for improving virtual acoustic simulations (in connection with the Lake CP4).
Durand Begault is the author of: "3-D Sound for Virtual Reality and Multimedia"; Academic Press Professional; ISBN 0-12-084735-3 and "The Sonic CD-ROM for Desktop Audio Production. An electronic guide to producing computer audio for multimedia"; Academic Press Professional; ISBN 0-12-084738-8 (available at http://www.sdtb.com)
Experiments with room shapes, reverberation decays and similar topics.
Harris Grant Associates are an acoustics and design consultancy, specialising in Recording Studios (Hit Factory-NY, Sony Music-London, Strongroom-London, Battery-NY), Large scale cinemas (Cinerama-Seattle), general acoustic optimisation (Lords Media Centre-London), as well as smaller scale home theatres, and superyacht installations.
Specialist acoustic consultancy within
the award-winning engineering consultancy, Hilson Moran,
providing advice on commercial, residential, educational,
healthcare, industrial and mixed-use developments worldwide.
Services include environmental, architectural and building services
acoustics advice, noise and vibration monitoring, external noise
modelling, 3D room acoustics modelling, audio simulations and demonstrations.
LBP is an independent consulting engineers firm in the area of acoustics, building physics, noise control and environmental control. LBP works on a wide variety of projects and employs app. 35 consulting engineers. The Product Group Room and Electro Acoustics is active in the acoustic design of concert halls, theatres, auditoriums, etc. It also designs sound systems for these venues as well for airports, mosques, etc. and designs systems for variable acoustics.
Level Acoustics is a company in the Laboratorium voor Akoestiek of the Faculty of Architecture, Building and Planning at Eindhoven University of Technology (TU/e). The company was formed in 2006. The mission of Level Acoustics is to disseminate knowledge in the field of architectural acoustics. We do this by organizing master classes, by presenting workshops and courses, by conducting research, and by participating in inspiring projects.
The former Laboratory
of "Musical Acoustics" in 1997 changed its name and main
tasks to "Raumakustische Simulation". The support of the national
industry of musical instruments had been done by developments
of quality determination procedures and improvement of various
kinds of instruments. Still up to the end of 1998 the performance
of the German Competition of Musical Instruments will lie in the
hands of this laboratory. The experience in the field of Musical
Acoustics will now be used to test the application of room acoustical
simulation software in musical performance locations. For this purpose
among others the CATT software is in use. International
Round Robin on Room Acoustical Computer Simulation have been
organized by the Laboratory and the third test was started during
Rensselaer Polytechnic Institute (US)
Rahe-Kraft GbR is an independent consultancy specialising in the design of sound systems for events and unusual requirements.
The founders combine their years of experience in live-sound engineering with the use of CATT to design systems which meet the requirements of the event business. They are also specialized in the use of line-arrays.
- sound system design matching event requirements
- cost estimates
- contract specifications
- quote evaluation
- simulation and auralisation
- CAD design for architectural requirements
- joint-venture planning with contractors
- supervision and quality management
|Sample SRL model|
As consultants in acoustics, audio and audio/visual/video design, The Talaske Group, Inc. was organized in 1987 to provide professional services to architects, engineers, building owners and users. Our clients turn to us when quality sound, effective communication, or freedom from disturbing noise, are important criteria within the buildings they design, occupy or administer.
Our experience encompasses
all building types with a specialization in the design of
performance, educational, worship and other assembly spaces.
The education and experience of our team of consultants qualify
us to offer the following services:
|CATT-Acoustic use, sample project|
WCL was established in 1967 at the School of Engineering of the University of Patras and began its activities two years later with the election of Professor George Kokkinakis as its director. It currently employs 50 persons (faculty members, researchers, postgraduate students and support personnel) and is active in three main R&D areas with organised teams: Telecommunications, Speech & Language Technology, Audio & Electroacoustics.
The Audio Group
has been active since the late 1980’s, it is headed by Assistant
Professor John Mourjopoulos and its research cover the areas
of digital audio system and room equalisation, perceptual audio
coding, audio and speech signal enhancement and digital audio