Patent 8699719 was granted and assigned to Bose Corporation on April, 2014 by the United States Patent and Trademark Office.
Apparatus and method for determining an operating state of an earpiece of a personal acoustic device and/or the entirety of the personal acoustic device through tests to determine the current operating state, wherein the tests differ depending on a current power mode of the personal acoustic device, and wherein at least one lower power test is employed during at least one lower power mode.