|PC Sound & Acoustics
Live Sound Solutions - Acoustic Consultancy & Engineering / Lydteknikker - Akustikingeniør og konsulent
|Professional Experience - Product Development
Before the development phase of any loudspeaker product there is a period of concept development. This period includes close cooperation with the designer and
a concept team, tailoring the concept until the right product is born. The roll of the acoustic engineer is to verify and evaluate potential solutions and often develop
new technologies and ideas in order to solve a particular problem, such as very limited space. This process teaches you to keep a very open mind and I have
never had the simple task, as many have, of simply choosing rectangular box dimensions for a loudspeaker (except for custom PA boxes).
The first commercially available loudspeaker for which I was responsible for the complete acoustic design and performance was the Beolab 1 loudspeaker.
Released in 1999, it has sold in over 15000 pairs and received very good reviews in the Hi-Fi press. Since then, I have worked on numerous concepts and the
development of some fantastic loudspeakers, including a professional studio monitor for near-field monitoring. This monitor was built around a concept and has a
rather unusual but very practical design. The loudspeaker is a 2 or 3-way modular active loudspeaker with an acoustic lens and provides unrivalled imaging and
sound performance. The system was tested over a lengthy period by artists such as Erann DD and Jean Michel Jarre and at Plant Studios in California. George
Massenburg also had a set on loan - he was quite reluctant to give the speakers back. Weislaw Woszczyk at McGill University in Canada was also involved in
testing. Later I developed the Beolab 7-1 loudspeaker which has been available since December 2004. It is a stereo 3-way active loudspeaker for the latest
Beovision LCD and plasma displays from Bang & Olufsen. It offered, without doubt, the best television sound on the market at that time.
A very important roll of the loudspeaker engineer is the ability to move the product from prototype assembly to large scale production. For me, this work has
included the design and specification of state of the art test equipment including test boxes for level adjustment (for drive unit sensitivity differences, including
compensation for atmospheric temperature and pressure variations), frequency range measurements and rub and buzz and air leak measurement and failure
registration. This area also includes detailed tolerance chain analysis and general quality control of drive units.
Furthermore, I have been responsible for technical documentation regarding the products I have been responsible for, such as technical input for user manuals
and service documentation. I have also taken part in training seminars for service personnel, technical assistants and dealers, both in Denmark and in the US,
where I was involved with teaching a basic understanding of sound and acoustics to staff as part of a larger training programme.
I have used the following tools for loudspeaker development: measuring equipment including the Bruel & Kjær 2012 and 2144 analysers, assorted B&K
microphones and pre-amplifiers including the Nexus range, the Klippel R&D measurement system, Audiocore software and the DP226 digital equalisers,
Yamaha and MIDAS digital mixing consoles, Cooledit, TrueRTA room measuring equipment, MLSSA, custom Matlab measuring equipment combined with a
12x12x13m measuring chamber, also near-field, 2pi, free-field and anechoic measuring techniques, various personal MathCad programs, and AudioMulch
A large area of loudspeaker development is understanding listening room acoustics and how loudspeakers interact with the room. I have experience of designing
listening rooms to IEC standards and correction of existing rooms. On the more practical side, I am not afraid to get a soldering iron going and I have taken care of
the complete control room installation for several IEC-standard listening rooms. Some of the products I have developed for B&O are shown below:
|A passion about sound since my early teens led me to study Electroacoustics at the University of Salford in England. Since completing this four year degree in
1996, I have worked full time with acoustics and particularly R&D of loudspeakers systems for Bang & Olufsen and Harman Professional Denmark. I have also
more than 20 years experience as a live sound engineer and providing acoustics consultancy for installs and tuning services for existing and new audio systems.
My company PC Sound & Acoustics specializes in live sound solutions, live recording and CD mastering, acoustic consultancy and loudspeaker system
engineering. I own sound system equipment to support concerts with an audience up to approximately 500 people. My company is registered in Denmark with the
CVR (Central Company Register) number 38996738. My contact details are shown below and my company Facebook page is here.
|Clockwise from top left: Beolab 1, Beolab
7-4 under Beovision 7, Beolab 5, Beolab
7-4 centre loudspeaker and Beolab 9.