06920229 is referenced by 116 patents and cites 44 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
10/236196
Publication Number
6920229 (B2)
Application Date
September 6, 2002
Publication Date
July 19, 2005
Inventor
Peter V Boesen
Des Moines, 50310
IA, US
Agent
McKee Voorhees & Sease
IPC
G08B 021/00
H04R 025/00
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