This is not Adobe. Rather user to user. For the past several years I have used successfully a desktop microphone that plugs into a computer jack - Windows computers. That seems to be the fall back if the USB microphone or headset cannot be made to work with a particular version of Premiere Elements.
Adobe used to include in its Read Me for older versions, that USB microphones do not work in those versions. Afterward that "known issue" citation was dropped from the Read Me of more recent versions, and I assume that some felt that USB microphone issues no longer existed for the more recent versions. There will be some who report that a particular USB Microphone works for them in a particular version of Premiere Elements Windows or Mac. I do not recall seeing a list correlating which Premiere Elements Windows or Mac version and which USB microphone. Some of these issues apparently can be resolved with settings while others cannot.
You might want to consult with the subscribers at the muvipix forum where this type of question is a popular one.
You can file an Adobe Feature Request Bug Report Form on this matter.
Add On....here is a link to a muvipix thread on USB Microphone that started here.
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