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Old 29th February 2012, 12:40 PM   #1
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Default Small Speakers for a hunting arrow

My name is Courtney Milligan of Lackey high school and my engineering team and I are desiging/creating a tracesable arrow using both a knock that lights up and a very small speaker. The speaker part iw what i need your help with, we need a speaker 3mm or smaller and it doesnt matter how long it is. But the smaller the better in this case since we need to not mess with balance of the arrow as much as possible.
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Old 29th February 2012, 01:36 PM   #2
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Wow thats a cool project. Do you mean to use a speaker attached to an arrow? There might be something like a piezo transducer that would be light and small. Try researching that. I would like to hear more about the project in general.
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Old 29th February 2012, 01:46 PM   #3
GloBug is offline GloBug  Canada
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Could you use a regular piezo to replace 2 of the flights? or would that damage your bow?
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Old 29th February 2012, 02:19 PM   #4
sreten is offline sreten  United Kingdom
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Hi,

You probably need a buzzer. For that form factor you'd probably
need to make your own. The buzzing element is self interupting.

You may be better off emitting radio frequencies and using
a handheld directional scanner of some sort, YMMV.

If sticking with sound, checkout watch beepers, might work.
If you mount them is a hollow tube with the length tuned
to the beeper frequency you can make it a lot louder.

rgds, sreten.
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Old 29th February 2012, 05:23 PM   #5
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Knowles Acoustics # WBFK-30019-000 is 5.00mm L x 2.73mm W x 1.93mm H. It is rather expensive though.

SPEAKER WIDE BAND FK SERIES - WBFK-30019-000
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Old 1st March 2012, 12:21 AM   #6
Enzo is offline Enzo  United States
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And by using the term "speaker" yoou may be limiting what you find. Transducer, sonic transducer, audio transducer, sonic alert - terms like that might help a search. You just need something to make a recognizable sound, right? No fidelity involed - an audible chirp or beep should suffice, even a ticking sound.
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Old 1st March 2012, 02:21 PM   #7
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Courtneylove13:

Neat, but: What is the speaker for? With that size nobody could hear it (the impact of the arrow would be louder). E
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Old 2nd March 2012, 12:14 AM   #8
Enzo is offline Enzo  United States
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Good question. I was assuming so the arrow could be retrieved, that may be wrong.
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Old 2nd March 2012, 12:19 AM   #9
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Enzo -- that was my asumption from the start. We could realy use some input from Courtney OP at this point. Courtnnnneeeee.
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Old 2nd March 2012, 03:54 AM   #10
Enzo is offline Enzo  United States
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They may be locked into this approach, but a tiny radio beacon and directional antenna would also work. They use those tracking wildlife. I sometimes see the DNR guys pull up into my rural driveway and aim a HF antenna around looking to track a flock of wild turkeys they are following.


Or maybe just a big hunk of radium in the arrowhead, and a scintillator to find it. Added bonus, the arrow will glow in the dark.
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