Sujet : Re: acoustic imager
De : jrwalliker (at) *nospam* gmail.com (John R Walliker)
Groupes : sci.electronics.designDate : 16. Apr 2025, 20:04:40
Autres entêtes
Organisation : A noiseless patient Spider
Message-ID : <vtov08$1m8as$4@dont-email.me>
References : 1 2 3 4
User-Agent : Mozilla Thunderbird
On 16/04/2025 17:39, legg wrote:
On Wed, 16 Apr 2025 07:41:06 -0700, john larkin <jl@glen--canyon.com>
wrote:
On Wed, 16 Apr 2025 09:01:00 +0100, Cursitor Doom <cd@notformail.com>
wrote:
>
On Tue, 15 Apr 2025 15:04:15 -0700, john larkin <jl@glen--canyon.com>
wrote:
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https://www.google.com/aclk?sa=L&ai=DChsSEwjTjaDVg9uMAxW3Hq0GHVmKOlYYACICCAEQARoCcHY&co=1&cce=2&sig=AOD64_3aGs74magNuXwdRGFo7oP8zK-LMQ&ctype=5&q=&adurl=
>
>
For 42,000 dollars? There's a product there you could develop, John.
>
Seems like it needs maybe a dozen electret mikes, one mux'd ADC, an
FPGA, and some code.
>
I'd expect to see a Chinese version on Temu soon.
Imaging suggests 'bounce', recording requires directivity,filtering
reflections and long-term (?|)comparison. Back-ground vs spot?
Measure what?
RL
It looks as if it is intended for imaging corona discharge.
It probably uses silicon mems microphones. They tend to have a
poorly damped ultrasonic resonance at around 30kHz which many
fail to show on the data sheets. This would make them well
suited to ultrasonic reception.
John
acoustic imager
Re: acoustic imager