Small Speakers for a hunting arrow

courtneylove13 · 29th February 2012, 12:40 PM

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.

firechief · 29th February 2012, 01:36 PM

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.

GloBug · 29th February 2012, 01:46 PM

Could you use a regular piezo to replace 2 of the flights? or would that damage your bow?

sreten · 29th February 2012, 02:19 PM

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.

raudio1969 · 29th February 2012, 05:23 PM

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

Enzo · 1st March 2012, 12:21 AM

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.

mickeymoose · 1st March 2012, 02:21 PM

Courtneylove13:

Neat, but: What is the speaker for? With that size nobody could hear it (the impact of the arrow would be louder). E

Enzo · 2nd March 2012, 12:14 AM

Good question. I was assuming so the arrow could be retrieved, that may be wrong.

firechief · 2nd March 2012, 12:19 AM

Enzo -- that was my asumption from the start. We could realy use some input from Courtney OP at this point. Courtnnnneeeee.

Enzo · 2nd March 2012, 03:54 AM

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.

29th February 2012, 12:40 PM	#1
courtneylove13 diyAudio Member Join Date: Feb 2012	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.

29th February 2012, 01:36 PM	#2
firechief diyAudio Member Join Date: Sep 2008 Location: Near Seattle Wa	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. __________________ "You can keep your insurance baby nothing is guaranteed" -Tom Petty

29th February 2012, 02:19 PM	#4
sreten diyAudio Member Join Date: Nov 2003 Location: Brighton UK	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. __________________ There is nothing so practical as a really good theory - Ludwig Boltzmann When your only tool is a hammer, every problem looks like a nail - Abraham Maslow

2nd March 2012, 12:19 AM	#9
firechief diyAudio Member Join Date: Sep 2008 Location: Near Seattle Wa	Enzo -- that was my asumption from the start. We could realy use some input from Courtney OP at this point. Courtnnnneeeee. __________________ "You can keep your insurance baby nothing is guaranteed" -Tom Petty

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29th February 2012, 01:46 PM	#3
GloBug Banned Join Date: Jun 2011	Could you use a regular piezo to replace 2 of the flights? or would that damage your bow?

29th February 2012, 05:23 PM	#5
raudio1969 diyAudio Member Join Date: Sep 2007 Location: N38	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

1st March 2012, 12:21 AM	#6
Enzo diyAudio Member Join Date: Sep 2004 Location: Lansing, Michigan	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.

1st March 2012, 02:21 PM	#7
mickeymoose diyAudio Member Join Date: Nov 2008	Courtneylove13: Neat, but: What is the speaker for? With that size nobody could hear it (the impact of the arrow would be louder). E

2nd March 2012, 12:14 AM	#8
Enzo diyAudio Member Join Date: Sep 2004 Location: Lansing, Michigan	Good question. I was assuming so the arrow could be retrieved, that may be wrong.

2nd March 2012, 03:54 AM	#10
Enzo diyAudio Member Join Date: Sep 2004 Location: Lansing, Michigan	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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