請問下列的是什麼麥克風及其收音原理?
https://www.facebook.com/#!/photo.php?fbid=276809199096779&set=a.276809192430113.60123.100003031037166&type=1&theater
https://www.facebook.com/#!/photo.php?fbid=276809355763430&set=a.276809192430113.60123.100003031037166&type=1&theater
https://www.facebook.com/#!/photo.php?fbid=276809405763425&set=a.276809192430113.60123.100003031037166&type=1&theater
https://www.facebook.com/#!/photo.php?fbid=276809465763419&set=a.276809192430113.60123.100003031037166&type=1&theater
https://www.facebook.com/#!/photo.php?fbid=276809532430079&set=a.276809192430113.60123.100003031037166&type=1&theater
https://www.facebook.com/#!/photo.php?fbid=276809589096740&set=a.276809192430113.60123.100003031037166&type=1&theater
https://www.facebook.com/#!/photo.php?fbid=276809682430064&set=a.276809192430113.60123.100003031037166&type=1&theater
https://www.facebook.com/#!/photo.php?fbid=276809755763390&set=a.276809192430113.60123.100003031037166&type=1&theater
https://www.facebook.com/#!/photo.php?fbid=276809819096717&set=a.276809192430113.60123.100003031037166&type=1&theater
