"When using headphones in areas where the air is very dry, it is easy to build up static electricity and possible for your ear to receive a small electrostatic discharge from the headphones," Apple said in a support site posting.
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The company emphasised that receiving a static shock from a pair of earbuds does not necessarily indicate an issue with the iPod, iPhone, or sound equipment.
"This condition is not limited to Apple hardware and static can potentially build up on almost any hardware and could be discharged using any brand of earbuds," Apple said.
The posting advised avoiding using the headphones in extremely dry environments or touching a grounded metal object before inserting the headphones.