Description: Diffraction and reflection of sound wave, also showing the relationship between the tone and its frequency, finding the difference of music and noise as well as the wave from different tone. |
No.1, Bei Yi Xiang, Damucang Hutong, Xidan, Beijing P.R.C.100032
Copyright © 2009 China Educational Instrument & Equipment Corp. All rights reserved.
Damucang Hutong, Xidan, Beijing P.R.C.100032