JPS5986992A - On-vehicle sound reproducing device - Google Patents

Abstract

PURPOSE:To position fixedly an acoustic image in front by fitting a rectangular loudspeaker for reproducing a heavy low-pitched sound, to the center part of a dashboard of the front part in a car room, and driving it by a three dimension reproducing system. CONSTITUTION:Loudspeakers 7, 8 are installed at the left and right positions of a rear panel 2 of the rear part in a car room, and a woofer 9 for reproducing a heavy low-pitched sound is installed in the center part of a deashboard 3 of the front part. A three dimension reproducing system is a system for reproducing a sound by the left and right loudspeakers 7, 8 for reproducing an acoustic signal of a general band, and simultaneously, for emphasizing and reproducing further a low-pitched sound of a low-pitched sound area by one exclusive loudspeaker for reproducing a heavy low-pitched sound, therefore, by installing the loudspeaker 9 in the center part of the front in the car room, variations of sound pressure in each seat position are reduced to the minimum, and a good sound can be reproduced.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an in-vehicle sound reproducing device capable of reproducing sound in the interior of an automobile, particularly reproducing deep bass sounds.

Conventional configurations and their problems In general, in-vehicle sound reproduction devices have holes installed on the left and right sides of a rear panel in the rear of the vehicle interior, respectively, and speaker units are installed, and speaker boxes are installed on the left and right sides of the rear panel. However, the above-mentioned method of reproducing audio signals using the left and right speakers is adopted.In this type of vehicle interior sound reproduction method, the low frequency range is masked due to the noise caused by driving and engine sound, so the low frequency range is masked. Therefore, as a way to reinforce the bass sound, a large-diameter circular speaker dedicated to deep bass reproduction is installed in the center of the rear panel, and a 3-dimensional reproduction method is used to reproduce the left and right speakers. Attempts have been made to drive a central speaker. However, when these three-dimensional reproduction methods are used, the sound field is only behind the driver's seat, and it is extremely difficult to move the sound image to the front of the driver's seat and reproduce powerful sound inside the vehicle. there were.

As a countermeasure to these problems, a method has been considered in which the sound field is moved to the front of the driver's seat by installing speakers on the door on the side of the driver's seat and passenger seat, and on the side of the body in front of the door. Since the body and door width are small, the overall height of the speaker must be made thin, and in such cases, there are many disadvantages from the perspective of bass reproduction. Generally speaking, it is necessary to make the speaker shape larger or use a speaker shape that allows for a larger amplitude (it is necessary to provide amplitude margin, which increases the overall height of the speaker), but with door-mounted systems, etc. It is impossible to increase the height of the speaker or increase the total height of the speaker due to the installation space.

OBJECTS OF THE INVENTION An object of the present invention is to provide an on-vehicle sound reproduction device that can localize a sound field in front of the driver's seat and simultaneously reproduce deep bass sounds by using it in combination with a three-dimensional reproduction system.

Structure of the Invention The in-vehicle sound reproducing device of the present invention is configured such that a rectangular speaker for reproducing deep bass sounds is attached to the center of the dash board at the front of the vehicle interior, and the rectangular speaker and the left and right speakers are driven in a three-dimensional reproduction method. It is composed of

DESCRIPTION OF EMBODIMENTS FIGS. 1 and 2 show another embodiment of the present invention.
In the figure, 1 is the body of the automobile, 2 is the rear panel at the rear of the interior of the vehicle, 3 is the dash board at the front of the interior of the vehicle, 4 is the rear seat located inside the interior of the vehicle, and 5 is the rear panel of the vehicle. A driver's seat is located at the front of the vehicle interior of the vehicle, and 6 is a passenger seat located at the front of the vehicle interior. Speakers 7.8 are installed on the left and right positions of the rear panel 2, and the dash board 3 is equipped with speakers 7.8.
A Woo speaker 9 for deep bass reproduction is installed in the center of the system. In addition, as shown in Fig. 2, the dash board 3 also has an air conditioner outlet 1 in a part of the front center.
3. An ashtray 11, various sound device main bodies (cassette deck and equalizer) 12, and various adjustment levers 10 are arranged on the right side. The Uno speaker 9 and left and right speakers 7.8 are configured to be driven in a three-dimensional reproduction method.

Here, as shown in FIGS. 3 and 4, the Uno speaker 9 for the 3-day dimension has a square speaker shape from the viewpoint of effective use of space in the vehicle interior, and the entire speaker box is also square. , which aims to make effective use of space inside the vehicle. In addition, since the square speaker is a speaker dedicated to deep bass reproduction, the damper is made by connecting rectangular prism shapes with good linearity or a near damper is used to enable large amplitude. . This makes it possible to use a slim rectangular speaker system for deep bass reproduction, including the speaker box, which is much more efficient and improves the space factor compared to conventional circular cone speakers for deep bass reproduction. It can be installed in the center of the dash board in the front part of the vehicle interior. Furthermore, since all the devices in the front center part have a rectangular shape, it is possible to install a rectangular speaker for deep bass reproduction in any of these parts. The space at the back of the car has more space than other parts of the vehicle interior, making it the perfect location for installing the speaker system.

In addition, the 3-dimensional reproduction method means that the left and right speakers are used to reproduce acoustic signals in the -diameter band, and at the same time, the low frequency band (especially below 300 Hz) is reproduced with a single speaker dedicated to deep bass reproduction, further emphasizing the bass. However, when performing the above-mentioned 3-dimensional playback method in the vehicle interior, the speaker mounting position is only one speaker, so when installed in the center part of the front of the vehicle interior, each seat ( driving seat.

This minimizes the variation in sound pressure between the passenger seat and rear seat positions, allowing for good sound reproduction.

The woofer speaker 9, which is a rectangular speaker for deep bass reproduction, may be mounted at the center of the dash board 3, for example, as shown in FIG. 5a.

As shown in b and c, the rectangular speaker 9 for deep bass reproduction is installed in the front center of the vehicle interior and some of the equipment (air conditioner outlet 13).
, various adjustment levers 10, ashtrays 11, various sound devices 12)
In this case, if you move each device installed in the speaker mounting position to another space where there is no operational problem, you can reproduce heavy bass using the 3-dimensional reproduction method. It is possible to obtain a good serial sound reproduction device that can be used at the front center.

Effects of the Invention As detailed above, according to the present invention, a rectangular speaker for deep bass reproduction is attached to the central part of the dash board in the front part of the vehicle interior, and is configured to be driven in a three-dimensional reproduction method, so that deep bass sound can be produced. In terms of reproduction, it is possible to localize the sound image forward, while at the same time providing good and powerful interior sound reproduction with little variation in sound pressure at each seat position (driver's seat, passenger seat, rear seat). be able to.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the in-vehicle sound reproduction device of the present invention, FIG. 2 is an enlarged view of the main parts of the device, FIG. 3 is a block diagram of a woofer speaker used in the device, and FIG. Figure 4 is an enlarged sectional view of the main parts of the woofer speaker, and Figure 6 is a configuration diagram showing another embodiment of the same device. 2... Rear panel, 3
...Datsushu board, 7.8 ... Speaker, 9 ... Wooha speaker. Name of agent: Patent attorney Toshio Nakao and 1 other WJ
Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] This in-vehicle sound reproducing device is configured to have a rectangular speaker for deep bass reproduction installed in the center of the dash board at the front of the vehicle interior, and to be driven by a three-dimensional reproduction method.