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These days it's done digitally using DSP, and it can be easily done in real time. The principle is: you have two sound sources, one is a mic that is (mostly) capturing the speaker, like a directional

RE: Noise Canceling Microphones/headsets ____________________________________________________ I concur with Ken J. What you seek has been worked over pretty well, especially by some commercial

Alright, thanks Sergio and Kennjava! I was confused about the shure condensed lav being unbal, needing 5-10 v bias voltage on one of the pins and separate audio signal on another. So I managed to buy

Not entirely sure I agree with your gain/ noise comments? ...... If for example I take note of? a preamp noise floor reading, and then record a signal at - say - a level of say -40dB, and then remove

Here's one circuit that would employ two electret capsules in an noise-cancelling arrangement. We would of course use a better op-amp, and maybe adapt the OPA-Alice circuit to use phantom powering

There are several noise-cancelling capsules from JLI. They are based on a delayed path for the backwave. Of course, they need to be very close to the source.

I'm agreeing with Sergio. You need to buy or make a proper balancer/adaptor. Here's another model: https://www.avshop.ca/wire-amp-cable-adaptors-hard/deity-microphonesxlr-3-5mm-to-xlr-adapter As

It's been known for decades that one of the best noise-cancelling mic arrangement for voice pickup is two identical mics. One (A) is positioned right at the mouth, the other (B) is a few inches away.

I tend to agree, but there are exceptions, one of which is gain. Having gain as early as possible means that any self noise added down the line is now affecting a higher signal level, and has a

Hi All, Do you know of any designs or indeed PCB modules for active noise cancelling in a microphone ? I repeatedly encounter two situations recently where background acoustic noise is a significant

This is great! Can’t wait to hear how it sounds. I find with mine at unity gain I need padding for some sources such as close mixing drums. Best Regards, Jules Ryckebusch

I first tried the 164* series of op-amps after I came across Jules 'Alice OPA' project. At that time, the JLI pcb shipping charges outside of the USA made the cost of Jules' PCBs very high, so I

Sorry, I’ve given it some more thought and I don’t think SimpleP48 is the solution because you can’t isolate the exterior of the capsule (unless the CVL is already plastic?) and can’t shield

Thanks for the question. I admit that starting with the OPA Alice schematic is part of the reason for including D1, but I think the issues you mention are not that major. * "reducing headroom" * the

What is the purpose of D1? .... apart from reducing headroom, drawing extra current, and introducing a potential extra noise source? (Your included de-couping LPF will help with the latter of

I know you said "0 budget", but this is an off-the-shelf solution that is reasonably cheap in Europe: the t.bone CC 100 Shure Phantomadapter (

Well done! Clever design, paying also attention to Hi-Z area protection and RFI reduction that so many designs are missing. A charge amplifier gives indeed all the freedom you want to either increase

Hello there, I'm currently facing the following issue - We have this mic: Shure Centraverse Lavalier Condenser Microphone CVL (

Small styroflex caps should be replaced by NPO/CGO ceramics.? Much more reliable, better caps and no microphony.

I wanted to use a t.bone EM700 ( https://www.thomann.de/ro/the_tbone_em700_stereoset.htm ) (which I believe uses a 797 AUDIO CY011C (