I was wondering whether DC current flows or AC current flows from a headphone Jack. I am not sure because I was reading articles which were saying to measure the DC voltage between the Left and the right channel with respect to the ground. My question is how can a speaker produce varying output if DC current comes out of an Headphone jack. Please help me in clarifying my doubts. I am using the output from my PC sound card. Thanks Nitin
The detail here is that the current in a headphone jack will vary, to produce the vibrations in the headphone's cone/membrane, to reproduce sound. But, unlike what some people consider AC current:
A) The variation is not a stable wave with a periodic variance over time.
B) Current varies between little or no flow, to a certain degree flow in one direction. "AC" current varies between one direction (polarity, charge) and the opposite, that is, it's state shifts between positive and negative flow.
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