Patent ID: 8243946
Filing Date: 2012-08-14
Classification: H04R

Abstract:
1. A method of controlling a personal acoustic device comprising: receiving a signal from at least one movement sensor, wherein the at least one movement sensor is disposed on a portion of the personal acoustic device structured to be worn on a user's head to enable the at least one movement sensor to detect rotational movements of a user's head at a time when the personal acoustic device is in position on the user's head such that a casing of the personal acoustic device is adjacent an ear of the user, and wherein the signal indicates a detected movement; analyzing a characteristic of the detected movement to determine whether the detected movement is a rotational movement of the user's head caused by the user; and determining that the personal acoustic device is in position on the user's head in response to determining that the detected movement is a rotational movement of the user's head caused by the user, wherein: the at least one movement sensor disposed on a portion of the personal acoustic device structured to be worn on the user's head comprises a first accelerometer disposed on a first portion of the personal acoustic device that is structured to be worn on the user's head and a second accelerometer disposed on a second portion of the personal acoustic device that is also structured to be worn on the user's head; receiving a signal from the at least one movement sensor indicating a detected movement comprises receiving a first signal from the first accelerometer indicating a first acceleration detected by the first accelerometer, and receiving a second signal from the second accelerometer indicating a second acceleration detected by the second accelerometer; the method further comprises distinguishing a differential mode acceleration between the first and second accelerations from a common mode acceleration; and analyzing a characteristic of the detected movement to determine whether the detected movement is a rotational movement of the user's head caused by the user comprises analyzing the differential mode acceleration to determine whether the differential mode acceleration indicates a rotational movement of the user's head caused by the user.