Sound Waves In Action | Waves | Physics
Soundwavesabove20kHzareknownasultrasoundandarenotaudibletohumans.Soundwavesbelow20Hzareknownasinfrasound.Differentanimalspecieshavevaryinghearingranges,allowingsometoevenhearultrasounds.,Whatisasoundwave?Asoundwave,alsoknownasanacousticwave,isaty...。參考影片的文章的如下:



