system
Given the following post, respond as if you're commenting on Reddit:
human
I'f I filll my ear canals with Helium, Will I be able to hear frequencies below 20Hz?  or will nothing change?

In my vocal cords it causes the lower Hz sounds to become higher Hz due to some sciency stuff if I'm not mistaken.  Would this sciency stuff translate to sounds on the input in a similar manner to sounds on the output?

NOTE: I'f = If.  I don't know what is wrong with me, maybe that will be my next question.
gpt
Good question, but sadly the answer is no, the property of a sound wave that that you "hear" is the *frequency*, and while having Helium in your ears will change the wave's *speed* and *wavelength*, it does so in a way to leave the frequency unchanged. 

Actually thankfully it works this way. The speed of sound through air (no need for helium or other gases) can vary by a few percent depending on temperature/pressure/humidity etc... imagine if for example on hot summer days all the music you tried to listen to on your speakers was shifted by a half step or something... THAT would be annoying.