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:
May. 06, 2008
Filed:
Aug. 25, 2004
Mathias Haussmann, Zurich, CH;
Mathias Haussmann, Zurich, CH;
Phonak AG, Staefa, CH;
Abstract
The invention relates to an active hearing protection earplug comprising a shell () to be worn at least in part in a user's ear canal and being adapted to attenuate sound waves arriving at the outer end () of the shell, and an active system () comprising an input transducer () for converting ambient sound into audio signals, an audio signal processing unit () for processing said audio signals, and an output transducer unit () mounted within the shell for converting said processed audio signals into sound output at the inner end of the shell, wherein the amplification of the active system is negative and wherein the output transducer unit comprises at least two separate outputs (). The invention also relates to a method for manufacturing such an earplug.