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Cheap electrets that go up to 40kHz?

 

Hi all -

Any recommendations for cheap-ish electret elements that go up to 40kHz?

Thanks!

 

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Primo EM258 goes up to 80 kHz.

On Oct 29, 2024, at 08:45, cx b via groups.io <clistburnham@...> wrote:

?
Hi all -

Any recommendations for cheap-ish electret elements that go up to 40kHz?

Thanks!

 
Edited

The EM258 has a very useful ouptut at 40KHz.? ?At 80Khz it's almost nothing -- although it will still register something, just above the noise!
?
MEMS microphone capsules like those listed here: ? ?have a much better ultrasonic response.
?
On Mon, Oct 28, 2024 at 11:51 PM, Jonas Gruska wrote:

?
Primo EM258 goes up to 80 kHz.

On Oct 29, 2024, at 08:45, cx b via groups.io <clistburnham@...> wrote:

Hi all -
?
Any recommendations for cheap-ish electret elements that go up to 40kHz?
?
Thanks!
?
 

Can MEMs be powered in a similar way to the "Simple P48"?

On Tue, Oct 29, 2024 at 8:09?AM Arjay1949 via <info=[email protected]> wrote:

[Edited Message Follows]

The EM258 has a very useful ouptut at 40KHz.? ?At 80Khz it's almost nothing -- although it will still register something, just above the noise!
?
MEMS microphone capsules like those listed here: ? ?have a much better ultrasonic response.
?
On Mon, Oct 28, 2024 at 11:51 PM, Jonas Gruska wrote:
?
Primo EM258 goes up to 80 kHz.

On Oct 29, 2024, at 08:45, cx b via <clistburnham=[email protected]> wrote:

Hi all -
?
Any recommendations for cheap-ish electret elements that go up to 40kHz?
?
Thanks!
?
 

On Thu, Oct 31, 2024 at 08:50 PM, cx b wrote:
Can MEMs be powered in a similar way to the "Simple P48
?
Not quite.? Analogue MEMs mics - like the one I referenced to - are unbalanced devices.
I use the circuit here to interface a MEMS capsule with a phantom powered balanced mic input, to record bat ultrasound.
?This circuit provides c.2.5v to the MEMS capsule...... Analogue MEMs mics do not like over voltage!
?
?
 

I personally tested many electret capsules and if you don't need to listen to very high frequencies then EM272 easily reach 60kHz with a good sensitivity
Iv

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