×

Wireless earplug with improved sensitivity and form factor

  • US 9,516,404 B2
  • Filed: 02/21/2014
  • Issued: 12/06/2016
  • Est. Priority Date: 08/31/2006
  • Status: Active Grant
First Claim
Patent Images

1. A wireless communications earplug for use with a magnetic field transmitter, comprising:

  • a) a receiver comprising a coil of wire wound upon a bobbin of magnetic material; and

    b) a speaker having a case at least partially made of magnetic material, an acoustic output and an electrical input coupled to the wire of the receiver;

    wherein the receiver is mounted within 0.005 inches of the case of the speaker and oriented such that flux lines passing through the speaker are directed through the coil of the receiver and a measured inductance of the coil of the receiver is increased compared to an inductance of the coil of the receiver when the receiver is not mounted to the speaker.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×