Patent ID: 8452260

Claim:
A method of unlocking an electronic device, the method being performed by one or more processors and comprising: receiving a sound input from a microphone associated with the electronic device; comparing the received sound input to a previously stored sound code by: (i) determining a first plurality of peak amplitudes associated with the sound input; (ii) determining a first plurality of time intervals associated with the first plurality of peak amplitudes; (iii) determining whether the first plurality of peak amplitudes substantially matches a second plurality of peak amplitudes associated with the previously stored sound code; and (iv) determining whether the first plurality of time intervals substantially matches a second plurality of time intervals associated with the second plurality of peak amplitudes; and unlocking the electronic device in response to determining that (i) the first plurality of peak amplitudes substantially matches the second plurality of peak amplitudes, and (ii) the first plurality of time intervals substantially matches the second plurality of time intervals.