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1. EP2022675 - AUDIO PLAYBACK SYSTEM

Office European Patent Office
Application Number 07744259
Application Date 28.05.2007
Publication Number 2022675
Publication Date 11.02.2009
Publication Kind B1
IPC
B60R 11/02
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
11Arrangements for holding or mounting articles, not otherwise provided for
02for radio sets, television sets, telephones, or the like; Arrangement of controls thereof
H04R 3/04
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
3Circuits for transducers
04for correcting frequency response
H04R 3/12
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
3Circuits for transducers
12for distributing signals to two or more loudspeakers
CPC
H04R 5/02
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
5Stereophonic arrangements
02Spatial or constructional arrangements of loudspeakers
Applicants PANASONIC CORP
Inventors KATAYAMA TARO
HAGA TSUYOSHI
Designated States
Priority Data 2006152447 31.05.2006 JP
2007060825 28.05.2007 JP
Title
(DE) TONWIEDERGABESYSTEM
(EN) AUDIO PLAYBACK SYSTEM
(FR) SYSTÈME DE REPRODUCTION AUDIO
Abstract
(EN)
Provided is an audio playback system, which reduces a restriction on a place of installation and which reduces the dispersion of characteristics of sound pressures in a low frequency range due to the seats in a passenger interior of a vehicle so that a comfortable bass sound can be enjoyed at any seat. The audio playback system comprises a first filter ( 108 ), to which an audio signal outputted from a playback apparatus ( 107 ) is inputted, configured to pass a frequency band lower than a first-order resonance frequency of the passenger interior of the vehicle, a first sub-woofer ( 104 ) configured to receive an output signal of the first filter ( 108 ), a second filter ( 109 ), to which the audio signal from the playback device ( 107 ) is inputted, configured to pass a frequency band including the first-order resonance frequency of the interior, and a second sub-woofer ( 105 ), to which an output signal of the second filter ( 109 ) is inputted, configured to be installed near a node of a first-order resonance mode of the interior.

(FR)
L'invention concerne un système de reproduction audio, réduisant une restriction d'un emplacement d'installation et réduisant la dispersion des caractéristiques en fréquence de la pression sonore dans une gamme de fréquences basses pour les sièges se trouvant dans un compartiment, permettant ainsi la perception depuis un siège quelconque d'un son de fréquence basse agréable. Le système de reproduction audio comporte un premier filtre (108), auquel est appliqué un signal sonore produit par un dispositif de reproduction (107) pour reproduire le signal sonore et pour transmettre une bande inférieure à une fréquence de résonance principale dans le compartiment, un premier caisson de basses (104), auquel est appliqué le signal produit par le premier filtre (108), un second filtre (109), auquel est appliqué le signal auditif produit par le dispositif de reproduction (107), pour transmettre une bande contenant la fréquence de résonance principale du compartiment et un second caisson de basses (105), auquel est appliqué le signal produit par le second filtre (109) et qui est disposé à proximité du nœud du mode de résonance principale du compartiment.