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1. EP1901582 - AUDIO DEVICE AND AUDIO BEAM CONTROL METHOD

Office
European Patent Office
Application Number 06747103
Application Date 02.06.2006
Publication Number 1901582
Publication Date 19.03.2008
Publication Kind B1
IPC
H04R 1/40
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
1Details of transducers
20Arrangements for obtaining desired frequency or directional characteristics
32for obtaining desired directional characteristic only
40by combining a number of identical transducers
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
H04R 27/00
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
27Public address systems
H04R 29/00
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
29Monitoring arrangements; Testing arrangements
H04S 5/02
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
SSTEREOPHONIC SYSTEMS
5Pseudo-stereo systems, e.g. in which additional channel signals are derived from monophonic signals by means of phase shifting, time delay or reverberation
02of the pseudo four-channel type, e.g. in which rear channel signals are derived from two-channel stereo signals
CPC
H04R 1/403
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
1Details of transducers, ; loudspeakers or microphones
20Arrangements for obtaining desired frequency or directional characteristics
32for obtaining desired directional characteristic only
40by combining a number of identical transducers
403loud-speakers
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
H04R 27/00
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
27Public address systems
H04R 29/002
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
29Monitoring arrangements; Testing arrangements
001for loudspeakers
002Loudspeaker arrays
Applicants YAMAHA CORP
Inventors TAKUMAI SUSUMU
Designated States
Priority Data 2005166230 06.06.2005 JP
Title
(DE) AUDIOEINRICHTUNG UND AUDIOSTRAHL-STEUERVERFAHREN
(EN) AUDIO DEVICE AND AUDIO BEAM CONTROL METHOD
(FR) DISPOSITIF AUDIO ET MÉTHODE DE CONTRÔLE DE FAISCEAU AUDIO
Abstract
(EN)
In an audio device equipped with a speaker array device aligning a plurality of speaker units, a sound beam is emitted towards a specific person in a main beam direction, thus realizing the listening of the audio contents with good sound quality. Other persons listen to the audio contents at off-beam positions; hence, leaked sound due to side lobes of the sound beam is transmitted to them with respect to an intermediate band and a low band, thus realizing the listening of the sound with an adequate volume. A high band is subjected to sharp beam control, wherein with respect to an intermediate volume or higher volume, high-frequency components are convoluted with the sound beam and are emitted with non-directivity.

(FR)
Le dispositif audio selon l'invention comprend un dispositif de matrice de haut-parleurs comportant une pluralité d’unités de haut-parleur. En émettant un faisceau audio dans une direction principale de faisceau vers une personne en particulier, il devient possible d’écouter un contenu audio avec une qualité sonore constante. En outre, étant donné que d’autres personnes écoutent le contenu audio en position hors faisceau, de l’audio de fuite par le lobe latéral du faisceau audio est transmis pour la plage des sons médiums et graves et il est possible d’écouter le son avec un volume audio approprié. D’autre part un contrôle serré du faisceau est exercé sur la plage des sons aigus. Ainsi, le volume sonore des médiums et supérieurs est superposé au faisceau audio et la composante aiguë est émise de façon non directionnelle.