If you’re one of the unlucky few to still be rocking unshielded speakers around your work or living space, then you’re probably painfully aware of just how annoying that cell-signal “buzz” can be.

The problem is, speakers that aren’t shielded from electromagnetic (RF) interference will pick up on the radio frequency perturbations associated with incoming or outgoing cellular calls and interpret them as an incredibly annoying “buzz.”

read it here www.intomobile.com