So on my way back home I was listening to music on my bike and I got fascinated by a sound panning from left to right in my earphones. (I was listening Ready or Not by the Fugees). How does a single contact like a 3.5 mm jack provide a stereo sounding effect? How is it able to split the sound between both earphones?
In: Technology
A 3.5 mm jack isn’t a single contact; it’s three. A standard headphone jack can therefore carry three signals. In most that’s left ear, right ear, and ground. You can get 3.5mm jacks with more contacts too, some have 4 or even 5 and so can carry microphone or video data as well as stereo audio.
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