EP 2715714 A1 20140409 - METHOD AND APPARATUS FOR ACTIVE ATTENUATION OF AN ACOUSTIC TRANSDUCER
Title (en)
METHOD AND APPARATUS FOR ACTIVE ATTENUATION OF AN ACOUSTIC TRANSDUCER
Title (de)
VERFAHREN UND VORRICHTUNG ZUR AKTIVEN DÄMPFUNG EINES AKUSTISCHEN WANDLERS
Title (fr)
PROCÉDÉ ET DISPOSITIF D'AMORTISSEMENT ACTIF D'UN TRANSDUCTEUR ACOUSTIQUE
Publication
Application
Priority
- DE 102011076686 A 20110530
- EP 2012057362 W 20120423
Abstract (en)
[origin: WO2012163598A1] The invention allows active damping for almost all acoustic transducers, in which the present oscillation amplitude of the acoustic transducer is determined and a damping signal is applied to the acoustic transducer on the basis of the present oscillation amplitude. In this regard, the invention provides for a detection step (220) to involve specific prompting and measurement of a phase rotation for the oscillation in the acoustic transducer, preferably by means of a voltage pulse. The present oscillation amplitude is calculated by using known variables, which comprise the phase rotation and the phase angle of the oscillation at the time at which the phase rotation was prompted. The damping signal can be produced and adjusted on the basis of the present oscillation amplitude which is now known.
IPC 8 full level
G10K 9/122 (2006.01)
CPC (source: EP)
G10K 9/122 (2013.01)
Citation (search report)
See references of WO 2012163598A1
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)
DE 102011076686 A1 20121206; CN 103635956 A 20140312; CN 103635956 B 20160316; EP 2715714 A1 20140409; EP 2715714 B1 20151216; WO 2012163598 A1 20121206
DOCDB simple family (application)
DE 102011076686 A 20110530; CN 201280026994 A 20120423; EP 12716016 A 20120423; EP 2012057362 W 20120423