JPH03132295A - Vehicle mounted speaker equipment - Google Patents

Abstract

PURPOSE:To form a low frequency sound field in a cabin by installing a speaker to a bottom of a car body, providing a sound pipe leading the sound from the speaker to the front side of the car body along the bottom of the car body and providing an opening of the sound pipe under a dash board in the cabin of the car body. CONSTITUTION:A woofer 3 is provided at the outside of the cabin and th cavity of a car body frame 8 is used as a sound pipe 5. Then the sound output of the speaker 3 is led to the front side of the automobile through the sound pipe 5 and an opening 6 of the sound pipe 5 is provided under a dash board 7, from which the sound output radiates in the car body 1. Moreover, a squaker 4 is installed in front of a listener. Thus, the vibration of the mount part to mount the speaker equipment to the car main body is avoided and low frequency sound reproduction is attained. Moreover, since the opening 6 of the sound pipe 5 exists in front of the listener, the sound field of the ultra-low frequency sound field is realized, which is integrated with sound image of medium and high sound frequencies such as vocal being present in front by the squaker 4 installed in front of the listener.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a speaker device for use in a vehicle.

2. Description of the Related Art In recent years, with the spread of digital sources such as CDs and DATs, there has been an increasing demand for speaker devices that can reproduce deep bass sounds even in vehicle interiors.

With this background, the conventional in-vehicle speaker device has been transformed into a third
Description will be given based on a schematic side view of a vehicle compartment equipped with the speaker device shown in the figure.

In Fig. 3, 1 is a passenger compartment, 2 is a trunk room, which houses a bass speaker 3 having a large-area diaphragm.
A large-capacity cabinet 10 equipped with a bass reflex port 9 for reproducing heavy bass is installed in the trunk room 2, and a speaker 4 for medium and high frequencies is installed in front of the listener.

Problems to be Solved by the Invention Generally, in order to reproduce deep bass sounds, a large volume is required for a speaker device. However, the space that can secure such a large volume inside the vehicle is limited to the trunk room, door pockets, etc. In the conventional configuration shown in FIG. 3, the speaker device cabinet 10 is installed in the trunk room 2, so the storage space for luggage, etc. in the trunk room 2 is reduced accordingly. Furthermore, even when installed in the door compartment, the comfort of the vehicle interior must be sacrificed.

Furthermore, when reproducing deep bass sounds in a vehicle interior, the conventional mounting positions and mounting methods to the trunk compartment 2, door pockets, etc. are insufficient in terms of strength. Therefore, there is a large amount of energy loss due to unnecessary vibration of the installation part, and there is a lot of chattering noise.
This caused muffled noise.

Furthermore, in the sound field in the vehicle interior created by the conventional configuration shown in Fig. 3, even if the mid-high range such as vocals is localized in front of the listener by the speaker 4, the deep bass range is localized only behind the listener. As a result, the sense of unity in the sound field is greatly lacking.

The present invention solves the above problems by installing a deep bass reproduction speaker device without using space in the vehicle interior or trunk room for the speaker device, and creating a deep bass sound field that is integrated with the mid-high range in the car. It is intended to be realized indoors.

Means for Solving the Problems In order to achieve this object, the in-vehicle speaker device of the present invention is provided with an acoustic tube for reproducing deep bass sound at the bottom of the vehicle body, and an opening of the acoustic tube located inside the vehicle interior. It is installed under the dash board.

Effect of the Invention The present invention uses the above-mentioned means to install a deep bass reproduction speaker device without using space in the vehicle interior or trunk room for the speaker device, and to create a deep bass sound field integrated with the mid-to-treble range in the vehicle interior. realizable.

EXAMPLE Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

1 and 2 show an in-vehicle speaker device according to an embodiment of the present invention, where 1 is a vehicle interior, 2 is a trunk room, 3 is a bass speaker, 4 is a mid-high frequency speaker, and 5 is a speaker for medium and high frequencies. 6 is an opening of the sound tube 5, 7 is a dash board inside the vehicle compartment 1, and 8 is a columnar frame at the bottom of the vehicle body.

The operation of the speaker device configured as described above will be described below.

In FIG. 1, a bass speaker 3 is installed outside the vehicle interior, and a hollow portion of a vehicle body frame 8 is used as an acoustic tube 5. Further, the acoustic tube 5 guides the acoustic output of the speaker 3 to the front of the vehicle, and an opening 6 of the acoustic tube is provided under the dash board 7, from which the acoustic output is radiated into the vehicle interior 1. Furthermore, a speaker 4 for medium and high frequencies is installed in front of the listener.

In this way, it is possible to secure a large volume for deep bass reproduction without using the space in the passenger compartment 1 and the trunk room 2.Furthermore, since the speaker device is built into the vehicle body, the installation is easy and can be done easily. In terms of sound quality, it is possible to reproduce deep bass sounds.

In addition, since the opening 6 of the acoustic tube is located in front of the listener, the deep bass range is integrated with the mid-high range sound image of vocals etc. that is localized in front of the listener by the mid-high range speaker 4 installed in front of the listener. Sound field can be realized.

Furthermore, the space under the dash board 7 in which the acoustic tube opening 6 is provided is acoustically a horn-shaped space surrounded by the dash board and the floor on the top and bottom, and side walls on the left and right sides. Therefore, the acoustic impedance can be matched with the interior space of the vehicle at the opening 6 of the acoustic tube, so that acoustic power can be efficiently radiated to the interior space of the vehicle.

Effects of the Invention As described above, according to the present invention, the space in the vehicle interior or trunk room is not used for the speaker device, and the mounting part does not cause vibration when reproducing deep bass sound, and it is possible to reproduce deep bass sound. By installing a speaker system and matching the acoustic impedance with the interior space of the vehicle, it is possible to efficiently create a deep bass sound field in the vehicle interior that is integrated with the mid-to-high frequency range.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the in-vehicle speaker device of the present invention, FIG. 1 is a schematic side view of a car equipped with the in-vehicle speaker device according to the embodiment of the present invention, and FIG.
The figure is a schematic bottom view of a car equipped with a vehicle-mounted speaker device according to an embodiment of the present invention, and FIG. 3 is a schematic side view of a vehicle equipped with a conventional vehicle-mounted speaker. 1... Vehicle compartment, 2... Trunk room,
3. Old... speaker for bass, 4... speaker for medium and high frequencies, 5... acoustic tube, 6... opening of acoustic tube, 7...・Datsushu board, 8...
...Vehicle frame.

Claims (2)

[Claims] (1) A speaker is installed at the bottom of the vehicle body, a sound tube is provided along the bottom of the vehicle body to guide the sound from the speaker to the front of the vehicle body, and the opening of the sound tube is connected to the dash inside the vehicle interior of the vehicle body. An in-vehicle speaker device characterized by being installed under the board. (2) The vehicle-mounted speaker device according to claim (1), wherein the acoustic tube is provided in a hollow portion of a columnar structure in the longitudinal direction at the bottom of the vehicle body in the frame of the vehicle body.