FR2808407A1 - IMPROVED STEREOPHONIC AUDIOF FREQUENCY BROADCASTING PROCESS IN A VEHICLE AND THUS EQUIPPED VEHICLE - Google Patents
IMPROVED STEREOPHONIC AUDIOF FREQUENCY BROADCASTING PROCESS IN A VEHICLE AND THUS EQUIPPED VEHICLE Download PDFInfo
- Publication number
- FR2808407A1 FR2808407A1 FR0005460A FR0005460A FR2808407A1 FR 2808407 A1 FR2808407 A1 FR 2808407A1 FR 0005460 A FR0005460 A FR 0005460A FR 0005460 A FR0005460 A FR 0005460A FR 2808407 A1 FR2808407 A1 FR 2808407A1
- Authority
- FR
- France
- Prior art keywords
- vehicle
- speakers
- loudspeaker
- stereophonic
- loudspeakers
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R5/00—Stereophonic arrangements
- H04R5/02—Spatial or constructional arrangements of loudspeakers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
- H04R2499/10—General applications
- H04R2499/13—Acoustic transducers and sound field adaptation in vehicles
Abstract
Description
La présente invention concerne la diffusion de messages sonores dans un véhicule, et plus précisément la reproduction sonore stéréophonique en automobile pour ce qui concerne les passagers avant (conducteur et passager). The present invention relates to the broadcasting of sound messages in a vehicle, and more precisely the stereophonic sound reproduction in an automobile with regard to the front passengers (driver and passenger).
De plus en plus de constructeurs d'automobiles équipent leurs modèles haut de gamme d'équipements de reproduction sonore qui se voudraient être de véritables chaînes haute fidélité embarquées. More and more car manufacturers are equipping their high-end models with sound reproduction equipment that purports to be real on-board high-fidelity channels.
or, malgré de très nombreuses recherches effectuées par les industriels concernés, ces équipements sont jamais parvenus à procurer une image sonore stéréophonique comparable à celle obtenue à l'écoute d' chaîne hi-fi d'appartement. However, despite a great deal of research carried out by the manufacturers concerned, this equipment has never managed to provide a stereophonic sound image comparable to that obtained by listening to an apartment stereo system.
La principale raison provient emplacements sélectionnés pour les haut-parleurs habituellement employés par les constructeurs automobiles ou par professionnels de 'équipement audio. Ces endroits sont : portières avant, le tableau de bord, et les passages roues avant. The main reason stems from selected locations for the speakers usually employed by car manufacturers or by audio equipment professionals. These places are: front doors, dashboard, and front wheel arches.
Comme il est impossible dans une automobile de disposer les haut-parleurs des canaux gauches et droits à égale distance à la fois du passager avant et du conducteur, les composants de l'image sonore situés en centre ont tendance à provenir du haut-parleur le plus proche de l'auditeur, ce qui est le contraire du but recherché dans la reproduction stéréophonique. As it is impossible in an automobile to have the speakers of the left and right channels at equal distance from both the front passenger and the driver, the components of the sound image located in the center tend to come from the speaker the closer to the listener, which is the opposite of the aim sought in stereophonic reproduction.
connaît plusieurs dispositifs se proposant de pallier cette dissymétrie en installant dans l'axe de symétrie du véhicule un ou deux haut-parleurs dans le tableau de bord ou le plafonnier. knows several devices that propose to overcome this asymmetry by installing in the axis of symmetry of the vehicle one or two speakers in the dashboard or the ceiling.
L'inconvénient de ces solutions est d'augmenter le coût de l'installation sans pour cela parvenir à une qualité de restitution indiscutable. The disadvantage of these solutions is to increase the cost of the installation without achieving an indisputable quality of restitution.
Une autre solution connue consiste à retarder le signal provenant du haut-parleur situé le plus près de l'auditeur. Cette solution est satisfaisante pour l'auditeur placé le plus près du canal retardé mais elle a l'inconvénient de dégrader encore plus l'image sonore pour l'autre auditeur. Another known solution is to delay the signal from the loudspeaker closest to the listener. This solution is satisfactory for the listener placed closest to the delayed channel, but it has the disadvantage of degrading the sound image even more for the other listener.
L'avantage principal de la présente invention est d'obtenir une image sonore de meilleure qualité que celle obtenue par les moyens connus et à moindre coût d'installation. The main advantage of the present invention is to obtain a better quality sound image than that obtained by known means and at lower installation cost.
L'idée de la présente invention est de créer une image sonore entièrement virtuelle c'est-à-dire une image dans laquelle les ondes réfléchies qui parviennent aux auditeurs prennent toujours le sur les ondes directes et ceci dans la bande des fréquences situées entre 200 et 2000 Hz. The idea of the present invention is to create a fully virtual sound image, that is to say an image in which the reflected waves which reach the listeners always take the on direct waves and this in the frequency band located between 200 and 2000 Hz.
La présente invention concerne des emplacements privilégiés pour les haut parleurs, permettant d'obtenir ce résultat. The present invention relates to privileged locations for the loudspeakers, making it possible to obtain this result.
L'invention propose tout d'abord un procédé de diffusion de messages sonores stéréophoniques dans un véhicule à l'aide de moyens de restitution d'une modulation sonore d'un signal de base. Selon une caractéristique générale de l'invention, installe dans la partie avant de l'habitacle du véhicule des moyens formant haut-parleurs dans des volumes situes sous les passagers avant, les membranes des haut-parleurs étant dirigées vers l'avant du véhicule. The invention firstly proposes a method of broadcasting stereophonic sound messages in a vehicle using means for restoring a sound modulation of a basic signal. According to a general characteristic of the invention, installs in the front part of the passenger compartment of the vehicle means forming loudspeakers in volumes located under the front passengers, the membranes of the loudspeakers being directed towards the front of the vehicle.
De cette façon, obtient de manière tout à fait surprenante une image sonore dont la hauteur se situe à la partie inférieure du pare-brise, au dessus du tableau de bord. A aucun moment les sons ne semblent provenir de l'emplacement où sont situés les haut-parleurs. In this way, quite surprisingly obtains a sound image whose height is located at the bottom of the windshield, above the dashboard. At no time do the sounds seem to come from the location where the speakers are located.
La direction de 1 axe des membranes des haut-parleurs n'est pas vraiment critique mais elle ne doit pas trop s'éloigner de lignes parallèles à l'axe longitudinal du véhicule. Par exemple, il n'est pas avantageux d'orienter les membranes dans un proche de la verticale. The direction of the axis of the speaker membranes is not really critical but it should not stray too far from lines parallel to the longitudinal axis of the vehicle. For example, it is not advantageous to orient the membranes close to the vertical.
La position longitudinale des haut-parleurs par rapport au tableau de bord n'est pas critique et dans certains véhicules on aura intérêt, pour des raisons d'ergonomie, à rendre haut-parleurs solidaires des sièges des véhicules afin de les accompagner dans leurs déplacements longitudinaux. The longitudinal position of the loudspeakers relative to the dashboard is not critical and in certain vehicles it will be advantageous, for ergonomic reasons, to make loudspeakers integral with the seats of the vehicles in order to accompany them in their movements longitudinal.
Enfin, en ce qui concerne la position latérale des haut-parleurs, les essais ont montré que les jambes des passagers n'étaient pas obstacle à la propagation des sons pour la zone de fréquence considérée et que le choix de l'emplacement dépendait principalement d'un compromis entre la largeur de l'image sonore et sa focalisation. Finally, with regard to the lateral position of the loudspeakers, tests have shown that the passengers' legs were not an obstacle to the propagation of sounds for the frequency zone considered and that the choice of location depended mainly on '' a compromise between the width of the sound image and its focus.
Plus on rapproche haut-parleurs de l'axe de symétrie de la voiture et plus l'image est centrée. Plus on les éloigne de l'axe de symétrie et plus l'image est large, mais le centre de l'image sonore a tendance à s'éloigner de l'axe de symétrie du véhicule. The closer the speakers are to the axis of symmetry of the car, the more the image is centered. The further they are removed from the axis of symmetry, the wider the image, but the center of the sound image tends to move away from the axis of symmetry of the vehicle.
Une amélioration consiste à placer deux ou trois haut- parleurs par canal, l'un situé le plus près possible de l'axe longitudinal du véhicule et un autre placé le p--.-,s loin possible et éventuellement un troisième entre les d: x premiers. De cette manière peut obtenir une image à la fois large et centrée. An improvement consists in placing two or three speakers per channel, one located as close as possible to the longitudinal axis of the vehicle and another placed the p --.-, s as far as possible and possibly a third between the d : x first. In this way you can get an image that is both wide and centered.
Dans certains cas, topologie du véhicule le permet, on pourra remplacer les deux haut-parleurs situés près de l'axe longitudinal du véhicule par un seul diffusant la somme des deux canaux. In some cases, vehicle topology allows, we can replace the two speakers located near the longitudinal axis of the vehicle by a single diffusing the sum of the two channels.
Des résultats intéressants peuvent être obtenus en faisant diffuser la somme des deux canaux par les deux haut-parleurs situés près l'axe du véhicule. Interesting results can be obtained by broadcasting the sum of the two channels through the two loudspeakers located near the center line of the vehicle.
Une amélioration peut aussi être obtenue en soustrayant à chaque canal une fraction de l'autre. An improvement can also be obtained by subtracting from each channel a fraction of the other.
L'invention a également pour objet un véhicule équipé d'un dispositif stéréophonique audiofréquence, comportant une source signal de base, des moyens de restitution de la modulation sonore correspondant au signal de base. Selon une caractéristique générale l'invention, les moyens de restitution comportent des moyens formant haut-parleurs disposés dans la partie avant de l'habitacle dans des volumes situés sous passagers avant, les membranes des haut-parleurs étant dirigées vers l'avant du véhicule. The subject of the invention is also a vehicle equipped with an audio-frequency stereophonic device, comprising a basic signal source, means for restoring the sound modulation corresponding to the basic signal. According to a general characteristic of the invention, the restitution means comprise means forming loudspeakers arranged in the front part of the passenger compartment in volumes located under front passengers, the membranes of the loudspeakers being directed towards the front of the vehicle. .
Les moyens formant haut-parleurs étant destinés à reproduire au moins bande de fréquence située entre 200 et 2000 hertz. The loudspeaker means being intended to reproduce at least frequency band situated between 200 and 2000 hertz.
La figure 1 schématise une vue de dessus d'un véhicule automobile dans lequel on a installé deux moyens formant haut-parleurs pour voie de droite (1) et pour la voie de gauche (2) dans une position conforme à la présente invention.Figure 1 shows schematically a top view of a motor vehicle in which two loudspeaker means have been installed for the right track (1) and for the left track (2) in a position according to the present invention.
Claims (1)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0005460A FR2808407A1 (en) | 2000-04-28 | 2000-04-28 | IMPROVED STEREOPHONIC AUDIOF FREQUENCY BROADCASTING PROCESS IN A VEHICLE AND THUS EQUIPPED VEHICLE |
AU2001256408A AU2001256408A1 (en) | 2000-04-28 | 2001-04-25 | Method for improved audio frequency broadcast in a vehicle and vehicle equipped with same |
PCT/FR2001/001270 WO2001084882A2 (en) | 2000-04-28 | 2001-04-25 | Method for improved audio frequency broadcast in a vehicle and vehicle equipped with same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0005460A FR2808407A1 (en) | 2000-04-28 | 2000-04-28 | IMPROVED STEREOPHONIC AUDIOF FREQUENCY BROADCASTING PROCESS IN A VEHICLE AND THUS EQUIPPED VEHICLE |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2808407A1 true FR2808407A1 (en) | 2001-11-02 |
Family
ID=8849718
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR0005460A Withdrawn FR2808407A1 (en) | 2000-04-28 | 2000-04-28 | IMPROVED STEREOPHONIC AUDIOF FREQUENCY BROADCASTING PROCESS IN A VEHICLE AND THUS EQUIPPED VEHICLE |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU2001256408A1 (en) |
FR (1) | FR2808407A1 (en) |
WO (1) | WO2001084882A2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2975857A1 (en) * | 2011-05-23 | 2012-11-30 | Claude Bernard Roch Andre Carpentier | Method for diffusion of stereophonic modulations for e.g. car, involves reproducing band of frequencies less than fifty hertz by loud speakers located outside main passenger compartment at front/rear of vehicle |
WO2017068250A1 (en) | 2015-10-20 | 2017-04-27 | Claude Carpentier | Novel method for delivering stereo modulations in a motor vehicle |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60107998A (en) * | 1983-11-16 | 1985-06-13 | Nissan Motor Co Ltd | Acoustic device for automobile |
FR2599581A1 (en) * | 1986-05-28 | 1987-12-04 | Carpentier Claude | Stereophonic sound reproduction device for automobile |
FR2699782B1 (en) * | 1992-12-18 | 1997-06-27 | Carpentier Claude | IMPROVED AUDIO FREQUENCY BROADCASTING METHOD IN A VEHICLE, AND VEHICLE THUS EQUIPPED. |
JPH10224888A (en) * | 1997-02-06 | 1998-08-21 | Pioneer Electron Corp | On-vehicle speaker system |
-
2000
- 2000-04-28 FR FR0005460A patent/FR2808407A1/en not_active Withdrawn
-
2001
- 2001-04-25 WO PCT/FR2001/001270 patent/WO2001084882A2/en active Application Filing
- 2001-04-25 AU AU2001256408A patent/AU2001256408A1/en not_active Abandoned
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2975857A1 (en) * | 2011-05-23 | 2012-11-30 | Claude Bernard Roch Andre Carpentier | Method for diffusion of stereophonic modulations for e.g. car, involves reproducing band of frequencies less than fifty hertz by loud speakers located outside main passenger compartment at front/rear of vehicle |
WO2017068250A1 (en) | 2015-10-20 | 2017-04-27 | Claude Carpentier | Novel method for delivering stereo modulations in a motor vehicle |
Also Published As
Publication number | Publication date |
---|---|
WO2001084882A3 (en) | 2003-01-03 |
WO2001084882A2 (en) | 2001-11-08 |
AU2001256408A1 (en) | 2001-11-12 |
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Legal Events
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ST | Notification of lapse |