Global Patent Index - EP 1175812 A1

EP 1175812 A1 20020130 - METHOD FOR THE REPRODUCTION OF SOUND WAVES USING ULTRASOUND LOUDSPEAKERS

Title (en)

METHOD FOR THE REPRODUCTION OF SOUND WAVES USING ULTRASOUND LOUDSPEAKERS

Title (de)

VERFAHREN ZUR WIEDERGABE VON AUDIOSCHALL MIT ULTRASCHALL-LAUTSPRECHERN

Title (fr)

PROCEDE DE REPRODUCTION DE SON AUDIO A L'AIDE DE HAUT-PARLEURS A ULTRASONS

Publication

EP 1175812 A1 20020130 (DE)

Application

EP 00925256 A 20000502

Priority

  • DE 19919980 A 19990430
  • EP 0003931 W 20000502

Abstract (en)

[origin: WO0108449A1] The invention concerns a method for the reproduction of audio sound using ultrasound loudspeakers as well as a construction type of the loudspeakers and their application. A method and device for the reproduction of audio sound using an ultrasound generating device, whereby the audio signal to be reproduced is connected to the ultrasound frequency range via side-band amplitude modulation with a carrier signal in the ultrasound frequency range and whereby means are also provided to subject the ultrasound signal to dynamic error compensation. The compensated ultrasound signal is, if necessary, subjected to a frequency response linearisation procedure and then fed to an ultrasound convertor (loudspeaker), whereby means are provided for reducing the amplitude of the ultrasound carrier signal, (carrier reduction).

IPC 1-7

H04R 27/00

IPC 8 full level

G10K 15/02 (2006.01); H04R 27/00 (2006.01)

CPC (source: EP)

G10K 15/02 (2013.01); H04R 27/00 (2013.01); H04R 2217/03 (2013.01); H04R 2499/13 (2013.01)

Citation (search report)

See references of WO 0108449A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

DOCDB simple family (publication)

WO 0108449 A1 20010201; AT 276636 T 20041015; AU 4403600 A 20010213; DE 50007789 D1 20041021; EP 1175812 A1 20020130; EP 1175812 B1 20040915; EP 1484944 A2 20041208; EP 1484944 A3 20041215; US 2005207590 A1 20050922

DOCDB simple family (application)

EP 0003931 W 20000502; AT 00925256 T 20000502; AU 4403600 A 20000502; DE 50007789 T 20000502; EP 00925256 A 20000502; EP 04021692 A 20000502; US 11316305 A 20050422