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Multi-Way Conventional loudspeakers with crossovers

Newbee: robot speakers
Newbee: robot speakers
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Old 6th August 2006, 02:04 PM   #1
s_lapetite is offline s_lapetite  Switzerland
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Join Date: Aug 2006
Question Newbee: robot speakers

Hi everyone,

I'm working on a robotics project with small outdoor robots. I'm looking at different mechanisms to have the robots localize their neighboring robots. One idea would be to send an RF signal and a sound signal at the same time. The distance between two robots can then be determined based on the time between the reception of the RF signal and the sound signal.

Enough blabla, I'm a complete newbee in loudspeakers/audio and I would like to know if it is possible to find a lightweight (<300g) speaker that can be used to send sound 100 meters away in an omni-directional fashion?

I'd be happy if you could just give me a starting point.

Thanks for any help, sorry if this is seriously na´ve.

s_lapetite
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Old 6th August 2006, 02:54 PM   #2
LightwaveDude is offline LightwaveDude  United States
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Join Date: Nov 2005
I have no idea where you'd find one or how big (small?) they are made, but it sounds like you want a horn like many towns use for their noon siren. They are usually omi directional, and they can produce very high SPL (I can here the town whistle 3.5 miles away from town).
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Old 6th August 2006, 03:14 PM   #3
hugobors is offline hugobors  France
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Join Date: Feb 2002
Location: Lille
If I were you I will use some ultrasonic transducer like this :

http://www.conrad.fr/webapp/wcs/stor...egory_rn=19020

I don't know what's the angular dispersion of this but you can use 4 or more to have 360░ dispersion.
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