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:
Dec. 01, 2015
Filed:
May. 08, 2012
Jesko Lamm, Berne, CH;
Thomas Trachsel, Berne, CH;
Janik Buetikofer, Berne, CH;
Hans-jürg Moser, Bremgarten b. Berne, CH;
Fabian Morant, Berne, CH;
Jesko Lamm, Berne, CH;
Thomas Trachsel, Berne, CH;
Janik Buetikofer, Berne, CH;
Hans-Jürg Moser, Bremgarten b. Berne, CH;
Fabian Morant, Berne, CH;
BERNAFON AG, Berne, CH;
Abstract
A test system for evaluates acoustic feedback characteristics of a listening device by changing the transfer function of the signal path from an acoustic output to an acoustic input of the listening device. A variable filter comprises an acoustic input, an acoustic output, and a control unit for changing a transfer function of the filter. First and/or second acoustic propagation elements propagate acoustic sound, the first acoustic propagation element acoustically connecting the acoustic output of the listening device with the acoustic input of the variable filter, the second acoustic propagation element acoustically connecting the acoustic output of the variable filter with the acoustic input of the listening device; wherein the system is configured to allow a determination of acoustic feedback or a level of acoustic feedback of the listening device at different frequencies.