Links /روابطات ذات علاقة
http://zonalandeducation.com/mstm/physics/waves/introduction/introductionWaves.html
http://www.physicsclassroom.com/Class/sound/
http://www.acs.psu.edu/drussell/demos.html
http://homepage.ntu.edu.tw/~karchung/Phonetics%20II%20page%20nine.htm
http://homepage.ntu.edu.tw/~karchung/phonetics%20II%20page%20eight.htm
