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Wearable alert device having selectable alert volume and method of operating same

  • US 9,542,816 B1
  • Filed: 05/15/2014
  • Issued: 01/10/2017
  • Est. Priority Date: 05/15/2014
  • Status: Active Grant
First Claim
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1. A wearable alert device, comprising:

  • a housing enclosing a sealed volume;

    an audio transducer disposed in the sealed volume;

    a driver circuit disposed in the sealed volume that selectively drives the audio transducer in either a single ended mode or a double ended mode responsive to an enable signal;

    control circuitry disposed in the sealed volume that includes a personal area network (PAN) interface and a clock signal source that produces a clock signal, and which applies the clock signal and enable signal to the driver circuit responsive to receiving an alert message at the PAN interface, wherein the enable signal is controlled to have a state that is on, off, or alternating based on an audio profile used responsive to receiving the alert message.

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