Patent ID: 8320579

Claim:
A control cord for connecting a headset to a portable electronic device, and arranged to remotely control the portable electronic device, the control cord comprising: an earpiece connector provided at one end of the control cord; a device connector attached to another end of the control cord for connecting to the portable electronic device; and a self-powered controlling sensor provided within the control cord and in electrical communication with the portable electronic device, and arranged to control the portable electronic device using generated control signals, the controlling sensor comprising a piezoelectric material, the control signals being generated by deformation of the piezoelectric material independent of power supplied to the headset and independent of power supplied to the portable electronic device, the self-powered controlling sensor comprising: a first sensor element composed of piezoelectric material having a first thickness, and a second sensor element composed of piezoelectric material having a second thickness different from the first thickness, the first and second sensor elements configured to generate first and second control signals, respectively.