JPH0627355U - In-vehicle sound reproduction device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an in-vehicle sound reproducing device capable of obtaining a good sound field feeling in both a driver's seat and a passenger seat in a vehicle interior. [Structure] A center speaker 6 including first and second speakers 6a and 6b is installed at the center of the dashboard 2. The first and second speakers 6a and 6b face the driver seat 3a and the passenger seat 3b, respectively. The left and right front doors 4b and 4a have fifth and fourth speakers 5b and 5a, respectively.
Is installed. First and fourth speakers 6a, 5b
When L and R signals are input to the second and third speakers 6b and 5a, respectively, in the driver's seat 3a, the third speaker 5a from the right side, the fourth speaker 5b from the left side, and the first speaker 6
The sound a can be heard at the same volume. Also,
Even in the passenger seat 3b, the same volume can be heard in the same manner as above.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to an on-vehicle sound reproducing device.

[0002]

[Prior art]

 In the conventional vehicle-mounted sound reproduction device, speakers are only provided on the left and right front doors, respectively.

For this reason, the sound field feeling is impaired because the distance from the speaker is different from both the driver's seat and the passenger seat.

As a countermeasure for this, a speaker is provided on the dashboard to correct the sound field. However, in most cases, the left and right signals are simply added, so the improvement effect is insufficient. there were.

[0005]

[Problems to be solved by the device]

 The present invention has been made in view of the above points, and an object of the invention is to eliminate the drawbacks of the conventional example and to provide a good sound field with the driver's seat and the passenger seat in the vehicle interior. The present invention is to provide a sound reproducing device for use.

[0006]

[Means for Solving the Problems]

 The in-vehicle sound reproducing device of the present invention includes a center speaker arranged near the center of the dashboard, a first speaker facing the driver's seat, a second speaker facing the passenger seat, and a front speaker. A driver-side third speaker and a passenger-side fourth speaker arranged on the door are provided, and a passenger-side signal is input to the first speaker and a driver-side signal is input to the second speaker. It is configured so that the side signal is input.

Further, the input signals of the first speaker and the second speaker are delayed so that the sounds from the first and third speakers reach the driver's seat at substantially the same time, and The sounds from the second and third speakers arrive at approximately the same time.

[0008]

[Action]

 According to this invention, the sound on the passenger seat side and the sound on the driver seat side are emitted from the first and second speakers arranged on the dashboard, respectively, so that the speaker on the passenger seat side with respect to the driver seat. Sound is reinforced and becomes as strong as the sound from the speaker on the driver's side, and the left and right are balanced, improving the sound field feeling. Even in the passenger seat, the sound field feeling is improved because the left and right sound intensities are balanced in the same manner as above.

Further, since the input signals of the first and second speakers can be delayed with respect to the third and fourth speakers, the input signals to the driver's seat can be delayed by about 2.5 msec. The sound from the third speaker and the sound from the third and fourth speakers have the same arrival time and volume, and the sound field feeling can be improved.

[0010]

【Example】

 An embodiment of an on-vehicle sound reproducing device according to the present invention will be described with reference to FIGS.

FIG. 1 is a plan view showing an on-vehicle sound reproducing apparatus of the present invention, and FIG. 2 is a block diagram showing an example of speaker connection used for implementing the present invention.

In the figure, 1 is an automobile, 2 is a dashboard, 3a is a driver's seat, 3b is a passenger seat, 4b and 4a are left and right front doors, and 5a is a front door 4a on the driver's seat 3a side. The third speaker 5b is a fourth speaker arranged on the front door 4b on the passenger seat 3b side.

Reference numeral 6 denotes a center speaker, which is attached to the center of the dashboard 2 and faces the driver's seat 3a and has a strong directivity. The first speaker 6a and the passenger's seat 3b face the first speaker 6a. Similarly, the second speaker 6b having a strong directivity is used. The first speaker 6a and the driver's seat 3a have the same distance, and the second speaker 6b and the passenger's seat 3b have the same distance.

Reference numeral 7 is a head unit that serves as a signal source. Reference numeral 8 denotes a signal processing circuit, which gives a predetermined input signal to an amplifier that drives each speaker. Amplifiers 9 and 10 drive the speakers 5a and 5b and the speakers 6a and 6b, respectively. The operation of the present invention constructed as above will be described. When the signal L of the left channel is input to the first speaker 6a and the fourth speaker 5b and the signal R of the right channel is input to the second speaker 6b and the third speaker 5a, from the right side in the driver's seat 3a, The sound from the signal R radiated from the third speaker 5a installed in the front door 4a can be heard, and from the left side, the fourth speaker 5b installed in the front door 4a and the first speaker installed on the dashboard 2 can be heard. The sound by the signal L radiated from both of the one speaker 6a can be heard.

When viewed from the driver's seat 3a, the sound from the left side is emitted from the fourth speaker 5b installed in the front door 4b on the left side to the third speaker 5a installed in the front door 4a on the right side. Compared to the distance, the sound is considerably reduced and the sound image is pulled to the right, but the signal processing is performed so that the shortage is complemented by the first speaker 6a directed toward the driver's seat 3a. It is controlled by the circuit 8 and has the same sound intensity from the right side.

Further, since the first and second speakers 6a and 6b have strong directivity, there is no unnatural feeling that the driver seat 3a can hear the sound due to the R signal from the second speaker 6b.

Therefore, in the driver's seat 3a, the loudness of the left and right sounds becomes equal, and the sound field feeling improves.

Also in the passenger seat 3b, the sound from the left fourth speaker 5b is equal to the sound from the right third speaker 5a and the second speaker 6b in the same manner as above. And the sound field feeling is improved.

Since the distance from the first speaker 6a on the dashboard 2 to the predetermined listening position of the driver's seat 3a is shorter than the distance from the listening position to the speaker 5a of the right front door 4a, this distance difference When the input signal of the first speaker 6a is delayed by the signal processing circuit 8 for about 2.5 msec in order to correct the noise, the sound produced by the R signal from the first speaker 5a with respect to the listening position of the driver's seat 3a. And the sound due to the L signal from the first speaker 6a 2 arrive at the same time. As a result, the distance between the two becomes equivalent.

Therefore, in the driver's seat 3a, the left and right sounds have the same loudness and the arrival times are substantially the same, so that the sound image is localized in the center of the driver's seat 3a, and a natural sound field feeling can be obtained. .

In the passenger's seat 3b, in the same manner as above, by delaying the input signal of the second speaker 6b by about 2.5 msec, the left and right sounds have the same loudness and the arrival times are substantially the same. Therefore, the sound image is localized in the center of the passenger seat 3b, and a natural sound field feeling can be obtained.

In this embodiment, the delay time of the first and second speakers 6a and 6b is set to 2.5 msec. However, the delay time is not limited to this, and a special sound field is intentionally created. Good too.

[0023]

[Effect of device]

 According to the on-vehicle sound reproducing device of the present invention, since it is configured as described above, the sound images are localized in the center of the driver's seat and the passenger seat without being influenced by each other, and a natural sound field feeling is obtained. .

[Brief description of drawings]

FIG. 1 is a plan view showing an on-vehicle sound reproducing device of the present invention.

FIG. 2 is a block diagram showing an example of speaker connection used for implementing the reproducing apparatus.

[Explanation of symbols]

 1 Car 2 Dashboard 3a Driver's Seat 3b Passenger's Seat 4a, 4b Front Door 5a Third Speaker 5b Fourth Speaker 6 Center Speaker 6a First Speaker 6b Second Speaker 7 Head Unit 8 Signal Processing Circuit 9, 10 Amplifier

Claims (2)

[Scope of utility model registration request] 1. A center speaker disposed near the center of a dashboard, a first speaker directed to a driver's seat, a second speaker directed to a passenger's seat, and a front door. The third speaker on the driver side and the fourth speaker on the passenger side are provided, and the signal on the passenger side is input to the first speaker and the signal on the driver side is input to the second speaker. An on-vehicle sound reproducing device configured as described. 2. The input signals of the first speaker and the second speaker are delayed so that the sounds from the first and third speakers reach the driver's seat at substantially the same time, and 2. The on-vehicle sound reproducing apparatus according to claim 1, wherein the sounds from the second and third speakers arrive at approximately the same time.