EP 0145997 A3 19870930 - REPRODUCTION ERRORS COMPENSATION DEVICE FOR ELECTROACOUSTIC TRANSDUCERS
Title (en)
REPRODUCTION ERRORS COMPENSATION DEVICE FOR ELECTROACOUSTIC TRANSDUCERS
Publication
Application
Priority
- DE 3343027 A 19831128
- DE 3418047 A 19840515
Abstract (en)
[origin: US4675835A] In order to compensate reproduction errors in electroacoustic transducers (W), for example electrodynamic loud-speakers, microphones and pickup systems, computer circuits are used. In a digital computer circuit, the electrical input signals (U1 ) are converted into altered output signals (U2) according to the inherent properties of the transducer (W), stored in a memory (PROM), with the aid of a programme, which is likewise stored. When analogue computer circuits are used, the complex inherent response of the converter (W) in respect of the amplitude/frequency response and phase/frequency response is approximated mathematically in a closed, inverse form, and the resulting function is simulated with the aid of integrators (B), summing elements (S), inverters (I) and adjusting members (P).
IPC 1-7
IPC 8 full level
H04R 3/04 (2006.01)
CPC (source: EP US)
H04R 3/04 (2013.01 - EP US)
Citation (search report)
- US 4052560 A 19771004 - SANTMANN JOHN BRYANT
- EP 0094762 A2 19831123 - TELEDYNE IND [US]
- US 4109107 A 19780822 - BOAST WARREN BENEFIELD
- GB 2068678 A 19810812 - DBX
- US 4340778 A 19820720 - COWANS KENNETH W, et al
- DE 2600905 A1 19760715 - UNIV IOWA STATE RES FOUND INC [US]
- DE 3213513 A1 19821104 - NAT SEMICONDUCTOR CORP [US]
- EP 0084402 A1 19830727 - LONG EDWARD MATTHEW [US], et al
Designated contracting state (EPC)
AT BE DE FR GB IT NL SE
DOCDB simple family (publication)
EP 0145997 A2 19850626; EP 0145997 A3 19870930; EP 0145997 B1 19911106; EP 0145997 B2 19960110; DE 3485242 D1 19911212; JP H07114519 B2 19951206; JP S60134699 A 19850717; US 4675835 A 19870623
DOCDB simple family (application)
EP 84114089 A 19841122; DE 3485242 T 19841122; JP 25148584 A 19841127; US 67575284 A 19841128