LogFAQs > #965585071

If you flat out cannot hear Yanny at all, then you need to pitch shift the audio down X frequencies until it is within your auditory spectrum.

The opposite for Laurel. That is at a much lower frequency for you would need to pitch the audio up to make that hearable.

Both sounds are present in the audio. It all depends on what frequencies you can hear. I have only ever been able to hear Yanny. Which makes sense my ears work a lot better with high frequency sound.

I think what you listen through can also change how it sounds which might explain why some people switch between them.