Author: BobaMosFetDate: 08:15 08-06-07
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Does anyone have a schematic (or link to one) of a circuit that will
convert very low (below human audio) and very high (above human audio)
to somewhere in the 20Hz to 20kHz range? Even if there are 2
schematics (one for low and one for high) it would be helpful. Thanks.
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Author: John FieldsDate: 10:47 08-06-07
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On Fri, 08 Jun 2007 05:15:51 -0700, BobaMosFet
<jgbarber65@gmail.com> wrote:
>Does anyone have a schematic (or link to one) of a circuit that will
>convert very low (below human audio) and very high (above human audio)
>to somewhere in the 20Hz to 20kHz range? Even if there are 2
>schematics (one for low and one for high) it would be helpful. Thanks.
---
What frequencies and ranges are you talking about?
--
JF
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Author: BobaMosFetDate: 14:08 08-06-07
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On Jun 8, 10:47 am, John Fields <jfie...@austininstruments.com> wrote:
> On Fri, 08 Jun 2007 05:15:51 -0700, BobaMosFet
>
> <jgbarbe...@gmail.com> wrote:
> >Does anyone have a schematic (or link to one) of a circuit that will
> >convert very low (below human audio) and very high (above human audio)
> >to somewhere in the 20Hz to 20kHz range? Even if there are 2
> >schematics (one for low and one for high) it would be helpful. Thanks.
>
> ---
> What frequencies and ranges are you talking about?
>
> --
> JF
I'm not sure. I thought it would be interesting to hear how many sub
and super sonic sounds are around us. Anything above or below normal
hearing range is good.
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Author: Sjouke BurryDate: 19:53 08-06-07
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BobaMosFet wrote:
> On Jun 8, 10:47 am, John Fields <jfie...@austininstruments.com> wrote:
>> On Fri, 08 Jun 2007 05:15:51 -0700, BobaMosFet
>>
>> <jgbarbe...@gmail.com> wrote:
>>> Does anyone have a schematic (or link to one) of a circuit that will
>>> convert very low (below human audio) and very high (above human audio)
>>> to somewhere in the 20Hz to 20kHz range? Even if there are 2
>>> schematics (one for low and one for high) it would be helpful. Thanks.
>> ---
>> What frequencies and ranges are you talking about?
>>
>> --
>> JF
>
> I'm not sure. I thought it would be interesting to hear how many sub
> and super sonic sounds are around us. Anything above or below normal
> hearing range is good.
>
Google for "bat detector". Those convert bat
ultrasonics to the audio range.
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Author: JamieDate: 20:17 08-06-07
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Sjouke Burry wrote:
> BobaMosFet wrote:
>
>> On Jun 8, 10:47 am, John Fields <jfie...@austininstruments.com> wrote:
>>
>>> On Fri, 08 Jun 2007 05:15:51 -0700, BobaMosFet
>>>
>>> <jgbarbe...@gmail.com> wrote:
>>>
>>>> Does anyone have a schematic (or link to one) of a circuit that will
>>>> convert very low (below human audio) and very high (above human audio)
>>>> to somewhere in the 20Hz to 20kHz range? Even if there are 2
>>>> schematics (one for low and one for high) it would be helpful. Thanks.
>>>
>>> ---
>>> What frequencies and ranges are you talking about?
>>>
>>> --
>>> JF
>>
>>
>> I'm not sure. I thought it would be interesting to hear how many sub
>> and super sonic sounds are around us. Anything above or below normal
>> hearing range is good.
>>
> Google for "bat detector". Those convert bat
> ultrasonics to the audio range.
THe Stand by diode ring modulator! :)))
or
LM1496 chip will also do it ...
--
"I'm never wrong, once i thought i was, but was mistaken"
Real Programmers Do things like this.
http://webpages.charter.net/jamie_5
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