Bruel & Kjaer UK Ltd. - PRODUCT NEWS
Releasing the music in the Golden Gate Bridge
Using accelerometers, microphones, speakers and amplifiers - for uses that their designers surely never foresaw - composer Bill Fontana has been making sound art since the 1970s.
Trained as a composer, he soon found an interest in the physics of sound, and in the music inherent in the sounds of everyday life, as well as the developing world of modern music that uses sounds created with technological means.
Since then, his innovative vision has become internationally renowned through critically acclaimed installations all around the world. Big Ben, the Brooklyn Bridge, and the Arc de Triomphe are just some of the celebrated locations to have had their pulses felt by Bill as he sets out to show us the music that exists within both structures and everyday sounds.
Speaking in February 2012, Bill was beginning work on the next great creation, wiring up San Franciscos vast landmark with accelerometers to celebrate its 75th anniversary. When his installation opens in May this year, it will be Bills second project featuring the famous bridge. The first, in 1981, was a live replay of sounds like deep, booming foghorns from different parts of the bridge, as well as a nearby seabird refuge.
This time though, hes more interested in the vibrations. I really want to release that inner sound, he says. I have been climbing all over the bridge with some signal analyzers and having fun testing it out for the installation. Its an alive structure, and tapping into that is very exciting. Putting an accelerometer on either side of an expansion joint on the bridge sounds great, almost like something that chimes.
My favourite Brüel & Kjær product is a charge amplifier, says Bill. It runs on batteries when necessary, and I like that when you connect a charge accelerometer to it you have so much control over the accelerometers.
Alongside plenty of other equipment, his Charge Amplifier Type 2635 stands out due to the great control it gives over the signal you get. With input for transducers like accelerometers or hydrophones, and an audio output, it can connect structures to a variety of reproduction sources.
The charge amplifiers front panel is so precise that it is possible to very accurately alter the sound in very fine adjustments. You have a great deal of control, he says.
Over the years, Brüel & Kjær equipment has made an appearance everywhere that Bills projects have. In addition to the aforementioned hardware, he has used Brüel & Kjær Hydrophones Types 8103 and 8104, as well as some Type 4006 studio microphones bought in 1991.
Read the full article on: www.bksv.com/GoldenGateBridge
About Bruel & Kjaer
Brüel & Kjær is a world-leading manufacturer and supplier of sound and vibration solutions for use in a wide range of applications including environmental noise measurements, building acoustics, vibration measurements and quality control for use in the automotive, aerospace and consumer industries, as well as by local authorities. Today Brüel & Kjær has 900 employees and sales offices in 55 countries. Brüel & Kjær is a subsidiary of UK-based Spectris plc. (www.spectris.com). Spectris has annual sales of approximately £656m and employs around 6000 people worldwide in its 15 business units.
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