We read that's the kind of microphone they used. Who knows what they really used. If it's possible, it can't be ruled out because it's not what they said they did.close proximity microphone would stop sound from more than a few feet away.
It doesn't look like it to me.The videos, 50+ hours of it (why so much when "eagle eyed" hoax nuts are seeing "things"!) quite clearly show that the PLSS has significant mass, from their postures and the way it moves.
Physics of the Apollo Moon Walk
https://www.brighteon.com/7588098f-0e70-454c-851d-ae80d7e5254a
https://www.bing.com/videos/search?...s/search?q=Steve+the+Chemist+Moon&FORM=VDMHRS