this post was submitted on 07 Aug 2024
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Recommendations on a quality clip on NC microphone? (lemm.ee)
submitted 3 months ago by SurpriZe@lemm.ee to c/asklemmy@lemmy.ml
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I have to work in very noisy environments such as near construction sites, near very loud music or highways, and due to the nature of my job I need to be in a lot of online meetings.

I need a clip microphone with a really good noise cancellation feature that would filter all of the noise out leaving only my voice.

Any recommendations? I've found Hollyland Lark M2 but it seems it lets a lot of noise through anyway.

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[โ€“] vk6flab@lemmy.radio 5 points 3 months ago (2 children)

I suspect that your success rate will be very low. Bone conduction microphones might be your best bet.

Fundamentally a microphone doesn't know the difference between "good" sound and "bad" sound.

Most noise cancelling solutions are based around the idea that nearby sound is good and distant sound is bad.

It differentiate between the two by using the fact that it takes time for sound to travel.

If you have two identical microphones, you can set them up so that you talk directly into one, but not the other.

Any environmental sounds are picked up by both and used to cancel it - sometimes in software, other times just by reversing the microphone polarity.

Bone conduction microphones get their signal from physical contact with the audio source, your body.

Source: I've done a little bit of audio recording over the years in and outside of studios. My information might be incomplete and out of date. YMMV.

[โ€“] 1984@lemmy.today 0 points 3 months ago (2 children)

The human voice is a different frequency then construction noise though. Isn't it possible to build a microphone who filters out other frequencies? Maybe even customized to the users frequency?

I know nothing about this, just asking.

[โ€“] vk6flab@lemmy.radio 1 points 3 months ago

Sadly not. Form an audio frequency perspective, noise is many different frequencies. The human voice pretty much matches human hearing.

A voice is not one frequency, that's a tone. We've constructed systems that throw away much of the voice frequencies whilst still being understandable. Telephone calls, digital radio communication, etc.

That's not to reduce noise, it's to cram more calls across the same link. There's a side effect that does reduce noise to some extent, but not significant enough to remove construction noise.

[โ€“] jet@hackertalks.com 1 points 3 months ago

Not the microphone itself, if you want you can apply a bandpass filter for the voice ranges in the system after the microphone.