How a carbon microphone works

[@saifmohammad1956]

So Much Helpful Video. I try to understand this by reading books but failed. Thank you for this video.
Saif Mohammad
EEE 15
Rajshahi University of Engineering & Technology

[@SonNguyen-ue6kx]

Cannot understand anything, subtitles please..

[@sabyasachee9044]

Sound quality khub e low brother..