Etymotics HF5: Where does all the air go?
Mar 11, 2015 at 1:09 PM Thread Starter Post #1 of 3

mccc

New Head-Fier
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Hi,

a question out of curiosity: When inserting the HF5 into the ear, the air between (for example) the flange and the eardrum has to go somehwere...but the flange is going to seal the ear canal.
It becomes even mor estrange, if the HF5 is pulled out again, since the direction of movement work against the direction of
the flange and this will suck really heard (vacuum)...

Isnt that really bad for my ears...or am I going to believe in an urban legend?

What are the real physics here?

Best regards,
mcc
 
Mar 11, 2015 at 2:16 PM Post #2 of 3
You can actually hear the effect of the driver distorting in that situation with some in ears ('driver reflex' or something), but they're few and far between these days it seems. Yay, engineering! But good question. Luckily, not that much air is really moving in that situation, your ears are sensitive and the headphones provide for some noise protection from the outside world.
 
Mar 11, 2015 at 2:27 PM Post #3 of 3
I would think since the tips are mallable that as you insert them air is forced around it until you stop. Some people will slightly pull the unit out to add some air back in because of that vacuum sensation, me included.
 

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