EP 2839676 B1 20170614 - METHOD AND DEVICE FOR CONTROLLING THE OPERATING TEMPERATURE OF A LOUDSPEAKER
Title (en)
METHOD AND DEVICE FOR CONTROLLING THE OPERATING TEMPERATURE OF A LOUDSPEAKER
Title (de)
VERFAHREN UND VORRICHTUNG ZUR REGELUNG DER BETRIEBSTEMPERATUR EINES LAUTSPRECHERS
Title (fr)
PROCÉDÉ ET DISPOSITIF POUR LE CONTRÔLE DE LA TEMPÉRATURE DE FONCTIONNEMENT D'UN HAUT-PARLEUR
Publication
Application
Priority
- FR 1253670 A 20120420
- FR 1350321 A 20130115
- EP 2013057801 W 20130415
Abstract (en)
[origin: WO2013156439A1] The invention relates to a method for controlling the temperature of an electrodynamic loudspeaker comprising a membrane (140) excited by an electric motor fed by an excitation signal (221), characterised in that it comprises the following steps: a) obtaining the spectral distribution of the electrical impedance of the motor at a moment t; b) identifying an impedance peak in a pre-defined frequency range of the spectral distribution obtained in step a); c) determining the difference in frequency between the central frequency Fc1 of the impedance peak identified in step b) and the central frequency Fc0 of an impedance peak identified in the same pre-defined frequency range in a spectral distribution of electrical impedance of the motor, obtained at a moment t0 previous to t1 ; d) obtaining a correlation relation between the difference in frequency (Fc0-Fc1 ) and the temperature of said loudspeaker; and e) determining the temperature of the loudspeaker according to the result of step c) and the correlation of step d). The invention also relates to a device for implementing said method.
IPC 8 full level
H04R 3/00 (2006.01); H04R 29/00 (2006.01)
CPC (source: EP)
H04R 3/002 (2013.01); H04R 3/007 (2013.01); H04R 29/003 (2013.01); H04R 2499/11 (2013.01)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2013156439 A1 20131024; CN 104429099 A 20150318; EP 2839676 A1 20150225; EP 2839676 B1 20170614; FR 2989858 A3 20131025; FR 2989859 A1 20131025; FR 2989859 B1 20160701
DOCDB simple family (application)
EP 2013057801 W 20130415; CN 201380020967 A 20130415; EP 13716782 A 20130415; FR 1253670 A 20120420; FR 1350321 A 20130115