D.G.Edworthy Associates

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Apple Sound Ltd. - Consultants in Audio, Electroacoustics, Dynamics, Electronics and Acoustics.

AES (Audio Engineering Society). - The international society for audio engineering professionals.

Application Solutions Ltd. - Software and hardware development house and designers and manufacturers of Life-Safety Public Address Equipment.

Atkins Rail Ltd. - Major contractor for refurbishment of London Underground infrastructure.

Baldwin Boxall Communications Ltd. - Designers and manufacturers of Life-Safety Public Address Equipment.

BSI (British Standards Institution). - The UK Standards body.

Current Thinking - Specialists in the design and manufacture of products for legislative markets, especially the Voice Alarm and the Disability Discrimination Act (DDA) areas.

Electrical and Electronic Bulletin System. - Virtual community and marketplace for professionals and vendors in the electrical and electronic industry.

IEC (International Electrotechnical Commission). - The international electrotechnical standards body.

Integrated Systems - Europe. - The promoters of Europe’s No.1 show for professional AV systems integrators.

ISCE (Institute of Sound & Communications Engineers). - The learned body for professionals in the sound, presentation, performance and communications industries.

ISO (International Organization for Standardization). - The international body for standards.

PECO Electronics Ltd. - Distributors of public address and communication equipment offer advice and solutions for your problems.

PLASA. - The trade body for the lighting and sound industry.

SigNET AC Ltd. - Voice Alarm and audio communications systems manufacturers.

Tandberg Television Ltd. - offer a broad suite of open, standards-based products that provide the highest-quality digital TV solutions, including IPTV, HDTV, video on demand, advertising on demand, IPTV and interactive TV applications.

Tannoy Audix. - World renowned name for loudspeakers and audio systems.

J.M.Woodgate Associates. - Electronics design, standards and marketing consultants.

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