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. 22, 2022
Filed:
Dec. 19, 2018
Elliptic Laboratories As, Oslo, NO;
Thomas Kristoffersen Børstad, Oslo, NO;
Elliptic Laboratories AS, Oslo, NO;
Abstract
An electronic device comprises a speaker protection module () arranged to receive an audio signal () and to use one or more parameters relating to a loudspeaker to produce a controlled audio signal (). An amplifier () is arranged to amplify the controlled audio signal to produce an amplified audio signal () which is passed to the loudspeaker. The amplitude of the controlled audio signal () is such that the amplified audio signal () is less than or equal to an amplitude determined to be safe for the loudspeaker in view of the one or more parameters. An ultrasound generator () is arranged to generate an ultrasound signal () that is mixed () with the controlled audio signal () before the controlled audio signal () is passed to the amplifier (). The ultrasound generator () is capable of producing said ultrasound signal at a plurality of frequencies.