Sean Breheny wrote: This raises the question of how they zero in on a mate's position, if they can't hear via air soundwaves. > > Actually,though,I wonder if they are HEARING it through the air or FEELING > it thru the ground? This could partially explain why some of the gadgets > which have speakers(piezo tweeters,etc.) on them to produce high pitched > sounds don't work well,perhaps they need to introduce more of the sound > into the ground. AFAIK,these noisemaking insects only make their noise > while stationary on the ground,not while flying. > > Another possibility is that only one gender makes the noise and only the > other gender can hear it! This could also be a problem,for obvious reasons! > > I'm not a biology expert,just wondering. > > Sean > > | > | Sean Breheny > | Amateur Radio Callsign: KA3YXM > | Electrical Engineering Student > \--------------=---------------- > Save lives, please look at http://www.all.org > Personal page: http://www.people.cornell.edu/pages/shb7 > mailto:shb7@cornell.edu ICQ #: 3329174 -- Steam engines may be out of fashion, but when you consider that an internal combustion engine would require recovery of waste heat by transfer just before top dead centre then fashion becomes rather redundant, USE STRATIFIED HEAT EXCHANGERS ! and external combustion. You heard it first from: Graham Daniel, managing director of Electronic Product Enhancements. Phone NZ 04 387 4347, Fax NZ 04 3874348, Cellular NZ 021 954 196.