ganito na lang...
pwede mo na naman malaman kung alin ang high pitched at alin ang hindi
e.g. kunin mo si g2 or any other double ply head (pwede rin pinstripe). alisin mo sa drum. as in hawakan mo lang tapos tap mo sya. pakingan mo maigi tunog. you will hear a dull, thud sound
tapos kuha ka rin ng ambassador (or any single ply) lalo na yung snare side head. tunog plastic yun pero mapapansin mo mas mataas pitch nya kesa dun sa mas makapal na head
of course, this simple test wont work kung bugbog sarado na yung head mo
ibang usapan na kung alin mas mataas na pitch sa g2 or emperor
but you really cant compare single ply heads against double ply. just go with what sounds good on the drum that you are using and what you hear is best.