Wireless earplug with improved sensitivity and form factor

Patent No. 9,516,404

Issued: December 6, 2016
Filed: February 21, 2014
Term Extension: 239 days

Inventor: Parkins; John W. (Ithaca, NY)
Assignee: Red Tail Hawk Corporation (Philadelphia, PA)


An improved wireless communications earplug for use with a magnetic field transmitter. The wireless earplug has a receiver made of a coil of wire on a magnetic bobbin, mounted in close proximity or in contact with a magnetic case of a speaker. The magnetic case of the speaker serves to increase the magnetic flux through the receiver and improves the efficiency of the earplug. The speaker is acoustically coupled to an eartip, and the earplug may be molded into a custom earplug body.

Reference to Related Applications

This application is a continuation of co-pending application Ser. No. 12/832,363, filed Jul. 8, 2010, entitled "Wireless Earplug with Improved Sensitivity and Form Factor", now patent 8,693,720, which claimed benefit of Provisional Application No. 61/224,531, filed Jul. 10, 2009, entitled "Wireless Earplug with Improved Sensitivity and Form Factor", and which was a continuation-in-part of copending U.S. application Ser. No. 11/837,129, entitled "Wireless Communications Headset System Employing a Loop Transmitter That Fits Around the Pinna", filed Aug. 10, 2007, now patent 8,688,036, which claimed the benefit of Provisional Application No. 60/824,091, filed Aug. 31, 2006, entitled "Wireless Communications System Employing a Loop Transmitter That Fits Around The Pinna". The aforementioned applications are hereby incorporated herein by reference.


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