EP 3111667 A1 20170104 - METHOD AND SYSTEM FOR AUTOMATIC ACOUSTIC EQUALISATION
Title (en)
METHOD AND SYSTEM FOR AUTOMATIC ACOUSTIC EQUALISATION
Title (de)
VERFAHREN UND SYSTEM ZUR AUTOMATISCHEN AKUSTISCHEN ENTZERRUNG
Title (fr)
PROCEDE ET SYSTEME D'EGALISATION ACOUSTIQUE AUTOMATISE
Publication
Application
Priority
- FR 1451504 A 20140225
- EP 2015052199 W 20150203
Abstract (en)
[origin: WO2015128160A1] The present invention relates to a system and to a method for automatic acoustic equalisation, characterised in that it comprises the steps of: measuring N impulse responses R1 1, R1 2, etc., R1 N following the emission of a pre-calibrated sound signal received by N microphones; calculating N corresponding frequency responses by means of fast Fourier transform; establishing an average M of the N frequency responses; translating said average M of the N frequency responses into a logarithmic frequency scale; interpolating a target signature sound curve Cec from a specific number of points selected by a user; translating said target signature sound curve Cec into a logarithmic frequency scale; comparing said averaged response M and said target response Cec by calculating the difference between said averaged response M and said target signature sound response Cec; analysing the curve Cdiff resulting from the difference between said averaged response M and said target response Cec; and determining filter parameters for reducing the difference between said averaged response M and said target response Cec by firstly processing the local maxima in descending order according to the gain thereof, then the local minima, and by carrying out consecutive iterations.
IPC 8 full level
H04R 3/04 (2006.01)
CPC (source: EP)
H04R 3/04 (2013.01); H04R 2499/13 (2013.01)
Citation (search report)
See references of WO 2015128160A1
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
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
FR 3018015 A1 20150828; FR 3018015 B1 20160429; CN 106063293 A 20161026; CN 106063293 B 20190607; EP 3111667 A1 20170104; EP 3111667 B1 20180411; ES 2676577 T3 20180723; WO 2015128160 A1 20150903
DOCDB simple family (application)
FR 1451504 A 20140225; CN 201580010329 A 20150203; EP 15703951 A 20150203; EP 2015052199 W 20150203; ES 15703951 T 20150203