"Noise Cancelling Microphones", using two back-to-back out-of-phase microphones so that it primarily picks up sound from NEARBY LIPS, have been in use for MANY years for Airplanes and Helicopters.and even along NFL sidelines: Then apply the noise reduction process to the entire recording, and the sampled background noise would be substantially reduced or eliminated entirely. You would record several seconds of the background noise, and the DAE would “sample” the noise signal to “learn” what to look for. Many digital audio editors such as Audacity have noise reduction functions that can be quite effective. However, when the gate is open, background noise will be picked up along with the main signal. It will shut off the signal when it stops (i.e.
* Use an outboard dynamic processor called a noise gate.
This will get the best “signal to background noise” ratio. * Speak forcefully, nor more than a few inches from the mic. If background noise is an issue that can’t be resolved by moving to a quieter location, then you only have a few options. All the mics you listed are cardoid, which do not meet your stated requirements.
And I doubt you will find one in your price range, or a USB model. It’s physically impossible, as picking up sound is what they do.Īs this article shows, a unidirectional mic with a lobar pick-up pattern rejects off-axis sound the best, but they can be difficult to use. No mic will reject background noise 100%.
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