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What is the wave that we are seeing? A 24Hz wavelength would be huge wouldn't it (since sound travels about 1000ft/sec, a 24Hz wave would be wavelength about 40feet) yet the water seems to be captured by the strobe in a wavelength of a few inches. Also, I thought sound waves are in the direction away from the speaker, not tangential to it. ( keep in mind that I know next to nothing about this type of audio, so I'm just asking here )




The wavelength of a 24 Hz soundwave is relatively long because the speed of sound is relatively high.
During one cycle, 1/24 sec, sound will travel about 46 ft.

In this case the wavelength depends on the speed of the water stream. The water will not have traveled
very far in 1/24 sec.