Found it, thank you Greg
http://www.avisoft.com/usg/vifa.htm
Sent from my iPhone
Please excuse my spelling on this tiny keyboard.
> On May 17, 2017, at 9:34 PM, Gregory O'Drobinak =
[naturerecordists] <> wrote:
>
> Martin:
>
> Parts Express has many kinds of speakers (and also tactile transducers) t=
hat could do the job.
> https://www.parts-express.com/
>
> Parts Express: the #1 source for audio, video & speaker building componen=
ts
> By Parts Express
> Speaker Parts, Woofers, Raw Speakers and other Audio Video products avail=
able at Parts Express who stocks, ships...
>
>
> I am not sure why you would need an 8 inch speaker for high-pitched sound=
s, or why it needs to be aluminum.
> Seems to me that most good small tweeters would be just fine for mouse sq=
ueaks and would faithfully reproduce the higher harmonics in the spectrum o=
f such vocalizations.
>
> 8 inch speakers tend to be used for low to mid frequency reproduction, bu=
t if it had an aluminum cone, that might help a bit.
> If you know what the lowest fundamental frequency of the mouse utterance =
is, then use that to select the type of midrange or tweeter you would need,=
based on that lower cutoff frequency.
>
> A quick guess, based on the slim amount of info you gave, suggests this o=
ne:
> https://www.parts-express.com/hivi-b3n-3-aluminum-driver-round-frame--297=
-428
>
> $ 9.98=09
> "HiVi B3N 3" Aluminum Driver Round Frame" from www.parts-exp...
> HiVi B3N 3" Aluminum Driver Round Frame
>
>
> You can't beat the price, it has a wide response (check the data sheet) a=
nd its small size means that it would be easy to carry and conceal.
> It also just happens to have an aluminum alloy cone. Try it! I don't se=
e the need for an 8 inch driver.
>
> Of course, you will need a small power amp to drive it, but parts Express=
has plenty of inexpensive amps that are light and run off of 12 to 24 volt=
s DC.
>
> If you need more detailed help, I would be glad to work with you on this =
project.
> Just let me know.
>
>
> Ciao,
> Gregory
>
>
>
> From: "Martyn Stewart [naturerecordists]" <naturere=
>
> To: Nature Recordist Group Group <>
> Sent: Wednesday, May 17, 2017 6:05 PM
> Subject: [Nature Recordists] High frequency small speakers
>
>
> A few years ago I did a job on Guam trapping brown snakes with pinky mous=
e sounds emitted from a high frequency speaker that was about 8=94 in diame=
ter and made of aluminum (i think)
> I cannot find the supplier i bought the speaker from and i=92m wondering =
if any of you guys know a place where i can get something similar..
> My computer lost a whole bunch of e-mails that had details.
>
> Any help would be appreciated..
>
>
>
>
>
>
>
> Martyn
> *************************************
> Martyn Stewart
> www.naturesound.org
> http://www.bbc.com/earth/uk
>
> Redmond WA
> 425-898-0462
>
> 47.65420118705451
> -121.98158740997314
>
> Make every garden a wildlife habitat
> **************************************
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>
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>
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>
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