Hi guys, Welcome to the Advanced Video Search Engine, and you are watching Sound Properties (Amplitude, Period, Frequency, Wavelength) | Physics | Khan Academy. That video is uploaded by khanacademymedicine at 2014-01-01T15:47:18-08:00. We are promoting this video only for entertainment and educational purpose only. So, I hope you like & enjoy it. [-_xZZt99MzY]