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you can use this one: https://www.dodotronic.com/product/ultramic-384k-evo/

When it comes to using studio mics for ultrasonic recording - and especially for outdoor nature recording - then I think the Sennheiser MKH8020 would probably be hard to beat ? .....? Extended upper

Actually it depends very much on what one expects. I've done some experiments with ultrasonic response of typical studio mics. Using cymbals as the source, one finds out there is significant energy

I too would be interested to learn how soundwichartist makes the appropriate measurements..... I have found that measuring the detailed ultrasonic response of mic caspules is not an easy task,

How do you measure mikes up to 40kHz?

As Underwood suggests in his post, the ultrasonic response of some MEMS mic capsules can be quite good ...... Certainly better than most electrets in my experience. The capsule in this unit from

Lots of cheap MEMS mics go higher than 40k. Am Fr., 27. Dez. 2024 um 19:59 Uhr schrieb soundwichartist via groups.io <soundwichartist@...>:

Learning more about building ultrasonic microphones, I posted a while ago about ultrasonic electret mics. I've found the advantages of them for sure, being nice and easy. learning more and more

I thought I'd provide an update to all of this... I decided to focus on the General Aviation scenario because I do that more often. I wanted active noise cancelling headphones and microphone but was

Yes Yes At the output of the mic preamp. As I just daid. Somewhat but not exactly.

Dear Jerry, I don't understand you impedance test jig. Microphone connect to pre-amp input ? after, measure pre-amp output ? Where should the audio analyzer be positioned? The signal generator is

Thanks heaps Jules and Jerry! Great resources and info as always — you've given me everything I need to solve my problem and it's very much appreciated. Cheers, Zander.

Here's the link, in case anyone is looking: /g/MicBuilders/files/Microphone%20impedance%20test%20jig%20Model.pdf

I have uploaded the file Microphone impedance test jig, which uses the signal injection model (IMO a less brutal method than the added load method). You calibrate the unit by making R1 and R2=zero

OK, that's the problem with using a commonly accepted name for a different contraption. So you should consider using a switch to connect/disconnect the potentiometer.

Thanks you for your reply, Jerry, A DI Box is not referring to any commercial product. I was simply talking about a device I made by connecting XLR connectors on both ends and attaching a variable

I would suggest there is a better method, that requires a balanced signal generator. What "*Audio Analyzer" do you intend to use? *

You can't do that, because you don't know the gain (or attenuation) of the DI box. What value is this potentiometer? Ideally it should be about 500 ohms. You m

Thank you for your response, Jerry. Based on the methods you provided, I will proceed to experiment with impedance measurement. The experimental setup is as follows: *Speaker (Sine wave Signal

This is not mandatory for a connection to qualify as balanced. The condition for being balanced is that both in-phase (hot) and out-of-phase (cold) pins present the same Common Mode impedance, i.e.