Invention Grant
- Patent Title: Loudspeaker protection
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Application No.: US15547836Application Date: 2016-02-01
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Publication No.: US10356521B2Publication Date: 2019-07-16
- Inventor: Jason William Lawrence , Roberto Napoli , Roger David Serwy , Jie Su , Stefan Williams , Rong Hu , Firas Azrai
- Applicant: Cirrus Logic International Semiconductor Ltd.
- Applicant Address: US TX Austin
- Assignee: Cirrus Logic, Inc.
- Current Assignee: Cirrus Logic, Inc.
- Current Assignee Address: US TX Austin
- Agency: Jackson Walker L.L.P.
- Priority: GB1510031.6 20150609
- International Application: PCT/GB2016/050215 WO 20160201
- International Announcement: WO2016/124897 WO 20160811
- Main IPC: H04R3/00
- IPC: H04R3/00 ; H04R29/00 ; G10L21/0272 ; H04R3/04

Abstract:
This application describes methods and apparatus for loudspeaker protection. A loudspeaker protection system (1100) is described having a first frequency band-splitter (102) for splitting an input audio signal (Vin) into a plurality of audio signals (v1, v2 . . . ,vn) in different respective frequency bands (ω1, ω2 . . . ωη). A first gain block (103) is configured to apply a respective frequency band gain (gt1, gt2 . . . ,gt3) to each of the audio signals in the different respective frequency bands and a gain controller (109; 1101) is provided for controlling the respective band gains. A thermal controller (1101) determines, for each of a plurality of the different respective frequency bands, a power dissipation for the loudspeaker in that frequency band and also determines a respective thermal gain setting based on the determined power dissipation for that frequency band. The gain controller is configured to control the respective frequency band gains based on the thermal gain settings.
Public/Granted literature
- US20180014120A1 LOUDSPEAKER PROTECTION Public/Granted day:2018-01-11
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