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:
Jan. 04, 2005
Filed:
Jul. 29, 2002
Applicant:
Alfred Stirnemann, Zollikon, CH;
Inventor:
Alfred Stirnemann, Zollikon, CH;
Assignee:
Phonak AG, Stafa, CH;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61B 500 ;
U.S. Cl.
CPC ...
Abstract
Acoustic parameters of an ear are recorded by measuring the impedance of the ear canal. A first pressure microphone measures the sonic pressure. A second pressure microphone measures the sonic pressure through a calibrated acoustic resistance. The sound energy flux is determined by the difference between the measured sonic pressures. The impedance is calculated from these results.