Sine wave in water _ exciter, amp
- 20Hz - 400Hz :
- 20Hz - 200Hz (Slow) :
- 20Hz- 300Hz (Close):
- Bell of King Seongdeok (Emile Jong) :
<figure class='embedvideo' data-service='youtube' data-iframeconfig='("src":"/www.youtube-nocookie.com/embed/kQXCTdoNFlo?autoplay=1"}'style=width:640px> </figure>