07209569 is referenced by 84 patents and cites 68 patents.

A communication device includes an earpiece housing adapted for fitting to an ear of a user such that the earpiece does not block the canal, an inertial sensor operatively connected to the earpiece housing for sensing positional changes of the user's ears, a processor operatively connected to the inertial sensor and disposed within the earpiece determining presence of an alert condition at least partially based on positional changes, and a speaker operatively connected to the processor.

Title
Earpiece with an inertial sensor
Application Number
11/113676
Publication Number
7209569 (B2)
Application Date
April 25, 2005
Publication Date
April 24, 2007
Inventor
Peter V Boesen
Des Moines
IA, US
Agent
McKee Voorhees & Sease
Assignee
SP Technologies
FL, US
IPC
G08B 23/00
H04R 25/00
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