Ear bud connector

[Michael Bean]

Hey everyone...
I just saw a picture of a set of ear buds and it reminded me of a question that's been in my head for a while now; why do some modern ear buds/phones have plugs with four connections (TRRS?) instead of three as in the past? Just wondering.

Mike

 

[agdr]

I believe that 4th connection, closest to the plug body, is used for video/mic. Here is a picture:

koje slusalice

So from the tip: left channel, right channel, ground, then video or microphone. For earbuds they probably just ignore that 4th position.

 

[Michael Bean]

I believe that 4th connection, closest to the plug body, is used for video/mic. Here is a picture:

koje slusalice

So from the tip: left channel, right channel, ground, then video or microphone. For earbuds they probably just ignore that 4th position.

Ah, yeah I forgot about mic options. Thanks

Mike