Okay friends, holy cow.
So apparently at 30FPS or some other frame rate, this would just look like a jiggly hose, but when perfectly synced with the sound wave, we have a super-amazing video.
Note: the sound is not traveling through the water, it’s simply the mechanics of the speaker shaking the hose in sync with the camera’s frame rate (kind of like how on car commercials it looks like the wheels are going backwards sometimes).