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Home › Magazines › 2009 › October › Sound Sorcery

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Sound Sorcery

Sound projection, noise cancellation and wave field synthesis

Published in issue 395, October 2009

Sound Sorcery
Music, speech, noisy neighbours – sound is all around us. And yet the science of acoustics holds many surprises: sound can be focused into beams, noise can be cancelled out by more noise, and sound waves can be made to appear from nothing as if by magic. Here we explain how the tricks are done.

Relevant websites

www.browninnovations.com/sound_domes.html
www.dakotaaudio.com
www.yamaha.com/yec/soundprojectors/
www.pioneer.eu/eur/content/press/news_20021010_PDSP1.html
www.sennheiser.com/sennheiser/home_en.nsf/root/press_archive_2_2001_110aes_2
www.holosonics.com
www.atcsd.com/site/
www.headwize.com/projects/noise_prj.htm
www.austriamicrosystems.com/eng/Products/Audio/Active-Noise-Cancellation/AS3501
www.uni-wuppertal.de/index-en.html
www.idmt.fraunhofer.de/eng/research_topics/wave_field_synthesis.htm
www.iosono-sound.com/
http://en.wikipedia.org/wiki/Intermodulation
http://en.wikipedia.org/wiki/Long_Range_Acoustic_Device
http://en.wikipedia.org/wiki/Sonic_weapon
http://deposit.ddb.de/cgi-bin/dokserv?idn=969174241&dok_var=d1&dok_ext=pdf&filename=969174241.pdf
http://en.wikipedia.org/wiki/Wave_field_synthesis

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Magazine October 2009
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