But video isn’t much without audio. Handheld recorders with small built-in microphones have a fairly high noise floor so [Matt] has a Rode NT1-A — a pricey but very quiet microphone.

Now that you know where the built-in microphone is located, you might be wondering how you can test it to ensure it is ...

The result is a deep dive into microphone specifications, through which most of us could probably learn something. Noise cancelling headphones have a set of microphones which provide anti-phase ...