The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 02, 2004
Filed:
Dec. 30, 2002
Applicant:
Inventor:
Richard Lance Willis, Lauderhill, FL (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03G 3/20 ; G01N 2/400 ; G01K 1/100 ; G01H 5/00 ; G01S 1/500 ;
U.S. Cl.
CPC ...
H03G 3/20 ; G01N 2/400 ; G01K 1/100 ; G01H 5/00 ; G01S 1/500 ;
Abstract
In a device having a sound tube and a receiver, a test signal is generated to apply to the receiver. An outgoing acoustic wave is created at the receiver from the test signal. A reflected acoustic wave is received at the receiver, wherein the reflected acoustic wave is delayed in time from the outgoing acoustic wave. A difference in time is measured between the outgoing acoustic wave and the reflected acoustic wave. The difference in time is used to estimate a length of the sound tube.