DEVELOPMENT OF IMPROVED SYSTEMS FOR MONOPHONIC AND STEREO-
PHONIC SOUND REPRODUCTION
PROVIDE A BASIS FOR DESIGN AND PRODUCTION OF IMPROVED,
FLEXIBLE AUDIO SYSTEMS AND PROCEDURES FOR HIGH QUALITY
REPRODUCTION OF SOUND FOR DOMESTIC AND SIMILAR PURPOSES
Status > FINISHED - 12-Dec-1993
Technological Area
Market Area
Start Date > 31-Mar-1987
End date > 31-Mar-1992 Duration > 60 Months
Actual cost > 3.5 M€ Participating countries > UNITED KINGDOM, DENMARK | Main contact DTU - DEPARTMENT OF INDUSTRIAL ACOUSTICS (DIA)
DANMARKS TEKNISKE UNIVERSITET
BYGNING 352,
2800 -LYNGBY > DENMARK
Tel. +45 42 88 16 22
Fax. +45 42 88 05 77 MR. KNUD RASMUSSEN > ASSOCIATE PROFESSOR
Organisation type > University |
Project Description
The initial research phase of the project has now been
successfully completed. The main objective of Phase 1 was
to design and implement experimental apparatus and
procedures to simulate the effects of a range of physical
characteristics such as loudspeaker location and
directivity, room surface treatments, etc., on sound
reproduction quality as assessed by human listeners.
These unique facilities are now designed, constructed and
operational at the ACOUSTICS LABORATORY of the TECHNICAL
UNIVERSITY OF DENMARK. Pilot experiments carried out on
the apparatus have confirmed its efficacy and established
the method for the main investigations.
Phase 2 of the project will consist of running experiments
utilising this facility in order to determine the causes
of, and find solutions to, universally recognised problems
of current sound production systems.
Technological Development Envisaged
The facilities completed in Phase 1 provide realistic and
adjustable simulation of loudspeaker sound reproduction in
a room together with evalatuion of the subjective human
responses to the sound field. Pilot experiments have
already provided new and useful psycho-acoustic data.
Further analysis of this data will help to plan specific
experiments which will identify the principal causes of
sound reproduction systems.
This knowledge will be used to devise solutions which can
be tested and evaluated in the same facilities and then
applied to future high quality loudspeaker products.
Main contact DTU - DEPARTMENT OF INDUSTRIAL ACOUSTICS (DIA)
DANMARKS TEKNISKE UNIVERSITET
BYGNING 352,
2800 -LYNGBY > DENMARK
Tel. +45 42 88 16 22 > Fax. +45 42 88 05 77 MR. KNUD RASMUSSEN > ASSOCIATE PROFESSOR
Organisation type > University
|
Contribution to project
Facilities for acoustic research (advanced electronic
instrumentation/computer facilities/special rooms for
acoustic measurements). Comprehensive library. Staff with
experience in mechanical vibrations and transducers.
Expertise
Established on 1st April, 1963 as a Scientific Institute of
the TECHNICAL UNIVERSITY of DENMARK. The UNIVERSITY has
been concerned with acoustics since 1942.
The Laboratory is concerned with teaching and research
inpure and applied acoustics. The activities are
concentrated within the fields of physical acoustics,
psychoacoustics, building acoustics, electroacoustics,
digital signal processing, vibration, room acoustics and
the measurement and control of noise.
Main contact KEF ELECTRONICS LIMITED
ECCLESTON ROAD,
ME15 6QP -TOVIL > UNITED KINGDOM
Tel. +44 1622 672 261 > Fax. +44 1622 750 653 MR. L. R. FINCHAM > TECHNICAL DIRECTOR
Organisation type > SME
|
Contribution to project
Share: 276,000 pounds sterling.
(includes EUREKA grants applied for).
Share: 23%.
Expertise
Company registered in the UNITED KINGDOM. Founded in 1961,
the company is now Britain's largest manufacturer of high
quality loudspeakers with a significant share of the U.K.
market and a thriving export market.
KEF pioneered computer-based loudspeaker testing and design
techniques in the early 1970s. Later KEF applied these
methods to production control. The current facilities are
among the most advanced in the world in the field, and
include an anechoic chamber, a large chamber for
reverberation and impulse tests, a listening room,
extensive computing and signal processing facilities, as a
well equipped model shop.
Main contact BANG & OLUFSEN TECHNOLOGY A/S
PETER BANGS VEJ, 15
7600 -STRUER > DENMARK
Tel. +45 9785 1122 > Fax. +45 9684 4001 MR. VILLY HANSEN > TECHNOLOGY MANAGER
Organisation type > Large company
|
Contribution to project
Share: 6,872,000 DKR (619,000 pounds sterling).
(includes EUREKA grants applied for).
Share: 51%.
Expertise
Major manufacturer of home entertainment products,
including all types of audio and video components. The
company has a unique and enviable reputation for fine
industrial design of its products and advanced ergonomic
design and convenience engineering. Its T.V. products are
highly regarded for picture quality and all its products
for their integrated remote control facilities.
B & O has modern facilities for research, development,
production and testing of high quality electronic equimemnt
for sound recording and reproduction for domestic purposes.
Computer installations and rooms for acoustic measurements
and listening tests are available as well as systems for
predicting frequency response and distortion. B & O boasts
the world's largest measuring room for loudspeakers,
together with special-purpose loudspeaker measuring and
signal processing equipment.
DENMARK