| ▲ | esafak 13 hours ago | |
It's ultrasonic; the frequency is much higher while the amplitude is much smaller. | ||
| ▲ | canucker2016 12 hours ago | parent [-] | |
The video mentions that the knife vibrates over 40000 times per second. | ||
| ▲ | esafak 13 hours ago | |
It's ultrasonic; the frequency is much higher while the amplitude is much smaller. | ||
| ▲ | canucker2016 12 hours ago | parent [-] | |
The video mentions that the knife vibrates over 40000 times per second. | ||