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Ultrasonic Directive Speaker

50+ piezo transducers generate audible sound beam

Published in issue 411, March 2011

This article explores the design of a DIY 50-metre range directive sound beam using an array of piezo ultrasonic transducers (up to 200!) driven with a PWM signal, all strictly experimental.

Relevant websites

www.lradx.com
www.holosonics.com

http://stores.ebay.com/hamshopjapan

Click below to download a PDF copy of this article from Elektor magazine.

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	Magazine March 2011
	UK411 (USD 7.80)

Please note. In view of the complexity of international markets, Elektor cannot guarantee the availability of components for this project.

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