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How much voltage is required for the earphones by which we listen voice and songs ? Please help with the calculations if possible??If we keep our earphones plugged with our mobile phones,do the battery gets discharged faster?


marked as duplicate by PeterJ, Chris Stratton, Dave Tweed Jul 5 '15 at 20:35

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  • \$\begingroup\$ The meaningful part of this question is a duplicate. Obviously any sane design for a battery powered audio device will not present a DC bias across a speaker (indeed, that is generally avoided regardless of the power source) so there should be next to no power consumption when not actually producing audio. \$\endgroup\$ – Chris Stratton Jul 5 '15 at 15:45


You can refer to this Article for calculation part under sensitivity section. Regarding the discharge part I don't think plugging on would lead to higher battery drain because once earphone is plugged it bypasses the inbuilt speaker which consumes a lot more power than earphones. I hope the answer is right.thanx

  • \$\begingroup\$ Most phones today do not have the earphone bypass the speaker, rather a second audio path becomes available but software selects between them (rings still go to the speaker typically), and when not producing audio neither is active. \$\endgroup\$ – Chris Stratton Jul 5 '15 at 15:46

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