Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!pacific.mps.ohio-state.edu!linac!att!cbnews!cbnews!military From: brooksp@hpcc01.corp.hp.com (Peter Brooks) Newsgroups: sci.military Subject: Re: Offensive use of Sound possible? Message-ID: <1991Jan24.044423.26468@cbnews.att.com> Date: 24 Jan 91 04:44:23 GMT Sender: military@cbnews.att.com (William B. Thacker) Organization: AT&T Bell Laboratories Lines: 16 Approved: military@att.att.com From: Peter Brooks This was tried in the '60s. One of the main problems for anti-personnel use is that its really low frequencies that do damage, and it's almost impossible to get them to beam. (Maybe if you used a crater like the radio-telescope in Puerto Rico...) Another problem is that the low frewuencies are difficult to shield against, which makes it difficult to use this against an enemy without destroying the equipment, not to mention the crew..... BTW, I saw a picture of the speaker cone they used; it was pretty awesome. I think its cutoff frequency was something below the range of hearing for the human ear. Pete Brooks