Global Patent Index - EP 0145997 B1

EP 0145997 B1 19911106 - REPRODUCTION ERRORS COMPENSATION DEVICE FOR ELECTROACOUSTIC TRANSDUCERS

Title (en)

REPRODUCTION ERRORS COMPENSATION DEVICE FOR ELECTROACOUSTIC TRANSDUCERS

Publication

EP 0145997 B1 19911106 (DE)

Application

EP 84114089 A 19841122

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

H04R 3/04

IPC 8 full level

H04R 3/04 (2006.01)

CPC (source: EP US)

H04R 3/04 (2013.01 - EP US)

Designated contracting state (EPC)

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