KR200262690Y1 - Stereo sound reproduction apparatus for a vehicle - Google Patents

Abstract

The present invention relates to a vehicle stereo sound output device for vehicle stereo sound reproduction that can provide balanced left and right stereo sound to all passengers in the vehicle. The present invention aims to provide balanced left and right stereo sound to all passengers in a vehicle. The stereo sound output device for a vehicle according to the present invention has first and second speakers installed on left and right sides of a front end of a vehicle and outputs stereo signals L / R opposed to each other, respectively. A third unit facing each other and arranged on the left and right sides with respect to the center of the front end of the vehicle, and outputting stereo signals L / R opposite to stereo signals L / R output from the first and second speakers, respectively; And a fourth speaker.

Description

Stereo sound reproduction apparatus for a vehicle

The present invention relates to a vehicular stereo sound output device for vehicular stereo sound reproduction, and more particularly to a vehicular stereo sound output device for vehicular stereo sound reproduction that can provide balanced sound to all passengers in the vehicle.

1 is a diagram illustrating reproducing stereo sound using a conventional stereo speaker. As shown in FIG. 1, when two speakers 11 and 12 are dropped and placed in front of each other to make a sound through the speakers 11 and 12, a person may feel that there is a sound source 13 at some point between the two speakers 11 and 12. do. At this time, if the volume of the two speakers (11, 12) is the same, it feels that there is a sound source 13 in the middle between the two speakers (11, 12), the larger the one side turned the sound source 13 is biased toward it I feel it. Therefore, a listener located at the same distance from the stereo speakers 11 and 12 can naturally feel the left and right balanced stereo sound on the line between the two speakers. However, when there are a large number of people, only the person sitting at the vertex of the equilateral triangle with two speakers (11, 12) on one side can feel the effect of the stereo sound, and the others are biased toward the speaker closest to them. It can be heard.

2 is a diagram illustrating reproducing stereo sound in a passenger car using a conventional vehicle stereo output device. Referring to the conventional stereo output device for a vehicle as shown in FIG. 2, despite the number of speakers (6 to 11), the positions of the driver and all passengers are not at the center. Therefore, as shown in FIG. 1, since the position of the person is not the center, the left and right balanced stereo sounds cannot be felt. In addition, the stereo signal is made for the reproduction of the left and right speakers disposed at ± 30 ° in the front, but the current vehicle stereo output device as shown in FIG. Since it plays simultaneously through the speaker, no one can feel the left and right balanced stereo sound that can be felt in FIG. The conventional stereo output device for a vehicle has a problem in that it is impossible to provide balanced sound to the left and right to anyone because the stereo signal is simultaneously played back and forth to all passengers who are not at the center.

3A and 3B are conceptual views of signal delay for providing stereo sound to a person in a conventional luxury car. This is a concept of signal delay processing to provide stereo sound only to the driver or a VIP. Ideal stereo listening requires all speakers to be at the same distance from the listener. Thus, by drawing a circle with the listener as the origin and the distance to the farthest speaker, the input signal of all speakers located closer than the farthest speaker is delayed to be virtually positioned on the circumference. This technology has a problem that can not be limited to one person because it can not determine the delay value for two or more passengers. Unlike the general listening room, the interior acoustic environment of a car is very poor in reverberation time and frequency characteristics because sound absorbing materials such as sheets, reflecting materials such as windows and various accessories are located in a narrow space in a space. Therefore, reverberation signal processing is essential to improve the acoustic environment. In order to obtain the reverberation effect that is heard in the actual hall, the initial reflection sound generated at the front of the stage is added to the front speaker, and the rear speaker is generated at the back of the actual stage. Rear reverberation should be added. However, in the existing car audio, the same reverberation signal is added to all speakers.

The present invention for solving the above problems is to provide a stereo sound balanced left and right to all passengers in the vehicle.

1 illustrates reproduction of stereo sound using stereo speakers.

2 is a diagram illustrating reproducing stereo sound in a passenger car using a conventional vehicle stereo output device.

3A and 3B are conceptual views of signal delay for providing stereo sound to a person in a conventional luxury car.

4A is a diagram showing sound reproduction in a room.

4B is a diagram showing a change in magnitude over time of the initial reflection sound and the rear reverberation sound;

5 is a view showing that the vehicle stereo sound output device according to a first embodiment of the present invention is installed in a vehicle.

6 is a view showing that the vehicle stereo sound output device according to a second embodiment of the present invention is installed in a vehicle.

7 is a view showing that the vehicle stereo sound output device is installed in a vehicle according to a third embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

11, 12, 14a, 14b, 14c, 14d, 15a, 15b, 15c, 15d: stereo speakers

13: position of the sound source that a person feels 16, 17: woofer

21: first left speaker 22: first right speaker

23: second left speaker 24: second right speaker

25, 35, 45: first rear speaker 26, 36, 46: second rear speaker

31a, 41a: first left low frequency speaker

31b, 41b: first left high frequency speaker

32a: first right low frequency speaker 32b: first right high frequency speaker

33a: second left low frequency speaker 33b: second left high frequency speaker

34a, 44a: second right low frequency speaker

34b, 44b: second right high frequency speaker

42: first right tweeter 43: second left tweeter

37: Super Bass Rear Speaker

According to a first aspect of the present invention, a vehicle stereo sound output device having first and second speakers installed on left and right sides of a front end of a vehicle and outputting stereo signals (L / R) opposed to each other is the first and second. Stereo signals (R / L) opposed to each of the two speakers and arranged on the left and right sides of the front end of the vehicle, respectively, and opposite to the stereo signals (L / R) output from the first and second speakers. It further comprises a third and fourth speakers for outputting respectively.

According to the second aspect of the present invention, in the vehicular stereo sound output device integrally formed at the front end of the vehicle, the third speaker and the fourth speaker are installed at the same height as the first and second speakers.

According to a third aspect of the present invention, the third speaker faces the left front seat of the vehicle, and the fourth speaker faces the right front seat of the vehicle.

According to a fourth aspect of the present invention, the third speaker and the fourth speaker are each a full-range speaker.

According to a fifth aspect of the present invention, the third speaker and the fourth speaker are each a 2-way speaker.

According to a sixth aspect of the present invention, the third speaker and the fourth speaker are respectively tweeters.

According to a seventh aspect of the present invention, the third speaker and the fourth speaker are respectively coaxial speakers.

4A is a diagram showing sound reproduction in a room, and FIG. 4B is a diagram showing a change in magnitude of the initial reflection sound and the rear reverberation sound with time. To achieve the reverberation effect that is heard in the actual hall inside the vehicle, the front speakers placed on the front of the vehicle add the initial reflections from the front of the stage, and the rear speakers placed on the rear of the vehicle reflect the rear reverberations reflected from the rear of the actual hall. Add. This gives the person in the vehicle the feeling of being in a hall.

Hereinafter, preferred embodiments of the present invention will be described in detail.

<First Embodiment>

5 is a view showing that the vehicle stereo sound output device is installed in a vehicle according to a first embodiment of the present invention. The first left speaker 21 is provided on the left side of the front end of the vehicle, and the second right speaker 24 is provided on the right side of the front end of the vehicle. The first left speaker 21 and the second right speaker 24 are speakers arranged in an existing vehicle. Here, the first right speaker 22 and the second left speaker 23 are respectively attached to the center of the front end, and other existing speakers such as the first left speaker 21 and the second right speaker 24 are provided. It is installed at the same height as the field. The first right speaker 22 and the second left speaker 23 are full-range speakers. And, each of the speakers 21, 22, 23, 24 are installed to have a certain direction, the first left speaker 21 and the first right speaker 22 is toward the left chair side of the front seat The second left speaker 23 and the second right speaker 24 face toward the right chair of the front seat.

The first left speaker 21 and the second left speaker 23 receive the left signal L to which the initial reflection is added, and the first right speaker 22 and the second right speaker 24 add the initial reflection. The right signal R is received. Therefore, the left and right stereo signals reach all passengers at the same time due to the set of the first right speaker 22 and the second left speaker 23 installed at the center.

The first rear speaker 25 and the second rear speaker 26 are speakers installed in the existing vehicle, and are intended to supplement the front stereo stage effect. In the first embodiment, the first rear speaker 25 and the second rear speaker 26 are used as woofers. The first rear speaker 25 is installed at the rear of the left rear seat of the vehicle. The second rear speaker 26 is installed behind the right rear seat. By delaying the signal through the retarder before the sound signal is input to the first rear speaker 25 and the second rear speaker 26, the first rear speaker 25 and the second rear speaker 26 receive the delayed left and right stereo signals. Output to prevent the side effects of the sound image placed on the rear side, the rear reverberation sound is added before the sound signal is input to the first rear speaker 25 and the second rear speaker 26, and the bass band pass filtering and reverberation signal Processing is performed to reproduce thrilling bass sounds, providing a surround feeling that can be felt in the theater.

Thus, the first embodiment provides a perfect stereo sound balanced left to right for all passengers. That is, the first embodiment can fundamentally solve the problem of lack of stereo stage due to the conventional vehicle stereo output device as shown in FIG.

Second Embodiment

6 is a diagram illustrating a vehicle stereo sound output device installed in a vehicle according to a second embodiment of the present invention. The second embodiment is the same as the first embodiment in the basic concept, but using a two-way speaker divided into a high frequency speaker and a low frequency speaker, or a coaxial fabricated by coaxially combining a high frequency speaker and a low frequency speaker The difference is that you use (Coaxial) speakers. The first left low frequency speaker 31a and the first left high frequency speaker 31b are provided on the left side of the front end of the vehicle, and the second right low frequency speaker 34a and the second right high frequency speaker 34b are placed on the front side of the vehicle. It is installed on the right side. The first left low frequency speaker 31a, the first left high frequency speaker 31b, the second right low frequency speaker 34a, and the second right high frequency speaker 34b are speakers that are disposed in an existing vehicle. Here, the first right low frequency speaker 32a, the first right high frequency speaker 32b, the second left low frequency speaker 33a, and the second left high frequency speaker 33b are respectively attached to the center of the front end. The first right low frequency speaker 32a and the second left low frequency speaker 33a are installed at the same height as other existing speakers such as the first left low frequency speaker 31a and the second right low frequency speaker 34a, respectively. The first right high frequency speaker 32b and the second left high frequency speaker 33b are installed at the same height as other existing speakers such as the first left high frequency speaker 31b and the second right high frequency speaker 34b, respectively. have. The first right low frequency speaker 32a and the first right high frequency speaker 32b form a two-way speaker divided into a low frequency speaker and a high frequency speaker, or a high frequency speaker and a low frequency speaker are coaxially manufactured. Second coaxial speaker, and the second left low frequency speaker 33a and the second left high frequency speaker 33b also form a two-way speaker divided into a low frequency speaker and a high frequency speaker. A speaker and a low frequency speaker are coaxially bundled to form a coaxial speaker. In addition, each of the speakers 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b is installed to have a certain direction, the first left low frequency speaker 31a and the first left high frequency speaker 31b And the first right low frequency speaker 32a and the first right high frequency speaker 32b face toward the left chair of the front seat, and the second left low frequency speaker 33a, the second left high frequency speaker 33b, and the second right side. The low frequency speaker 34a and the second right high frequency speaker 34b face toward the right chair of the front seat.

The first left low frequency speaker 31a, the first left high frequency speaker 31b, the second left low frequency speaker 33a, and the second left high frequency speaker 33b receive a left signal L to which an initial reflection sound is added, The first right low frequency speaker 32a, the first right high frequency speaker 32b, the second right low frequency speaker 34a, and the second right high frequency speaker 34b receive the right signal R to which the initial reflection sound is added. Due to the set of the first right low frequency speaker 32a, the first right high frequency speaker 32b, the second left low frequency speaker 33a and the second left high frequency speaker 33b provided in the center, the left and right stereo signals are all at the same time. The passenger is reached.

The first rear speaker 35, the second rear speaker 36, and the ultra-low rear speaker 37 are speakers that are arranged in a conventional vehicle and are intended to supplement the front stereo stage effect. In the second embodiment, the first rear speaker 35, the second rear speaker 36, and the ultra-low rear speaker 37 are used as the woofer. The first rear speaker 35 is installed at the rear of the left rear seat of the vehicle. The second rear speaker 36 is installed at the rear of the right rear seat. The ultra low rear speaker 37 is provided at the rear of the center rear seat of the vehicle. The first rear speaker 35 and the second rear speaker are delayed by delaying the signal through a delay before the acoustic signal is input to the first rear speaker 35, the second rear speaker 36, and the ultra low back speaker 37. The speaker 36 and the ultra-low rear speaker 37 output delayed left and right stereo signals to prevent side effects in which a sound image is located on the rear side. In addition, the first rear speaker 35 and the second rear speaker 36 have sound. The rear reverberation sound is added before the signal is input, and the bass band pass filtering and reverberation signal processing are performed, and the ultra low bass pass filtering is performed to the ultra low frequency rear speaker 37 before the acoustic signal is input, thereby providing a powerful bass sound. This gives you a surround feeling that you can feel in the theater.

Thus, the second embodiment provides a perfect stereo sound balanced left to right for all passengers. That is, the second embodiment overcomes the problem of stereo sound reproduction of the conventional vehicle stereo output device as shown in FIG. 2 and fundamentally solves the problem of lack of stereo stage due to the conventional vehicle stereo output device.

Third Embodiment

7 is a view showing that the vehicle stereo sound output device is installed in a vehicle according to a third embodiment of the present invention. The third embodiment is the same as the second embodiment in the basic concept, but focusing on the fact that the human finds the directionality of the sound uses a high frequency band, a high frequency speaker (tweeter) 42 is provided in the center of the front of the vehicle. The only difference is that it uses only 43. The first left low frequency speaker 41a and the first left high frequency speaker 41b are provided at the left side of the front end of the vehicle, and the second right low frequency speaker 44a and the second right high frequency speaker 44b are located at the front end of the vehicle. It is installed on the right side. The first left low frequency speaker 41a, the first left high frequency speaker 41b, the second right low frequency speaker 44a, and the second right high frequency speaker 44b are speakers provided in an existing vehicle. Here, the first right tweeter 42 and the second left tweeter 43 are respectively attached to the center of the front end, and the first left high frequency speaker 41b and the second right high frequency speaker ( It is installed at the same height as other existing speakers such as 44b). Both the first right tweeter 42 and the second left tweeter 43 are high-frequency speakers for correcting directionality. In addition, each of the speakers 41a, 41b, 42, 43, 44a, and 44b is installed to have a constant direction, and the first left low frequency speaker 41a, the first left high frequency speaker 41b, and the first right side are provided. The tweeter 42 is directed toward the left chair of the front seat, and the second left tweeter 43, the second right low frequency speaker 44a and the second right high frequency speaker 44b are located at the front seat. Facing toward the right chair.

The first left low frequency speaker 41a, the first left high frequency speaker 41b, and the second left tweeter 43 receive a left signal L to which an initial reflection sound is added, and the first right tweeter. 42, the second right low frequency speaker 44a and the second right high frequency speaker 44b receive the right signal R to which the initial reflection sound is added. A pair of centrally mounted first right tweeter 42 and second left tweeter 43 reach all passengers at the same time at the same time.

The first rear speaker 45 and the second rear speaker 46 are the speakers arranged in the existing vehicle and are intended to compensate for the front stereo stage effect. In the third embodiment, the first rear speaker 45 and the second rear speaker 46 are used as woofers. The first rear speaker 45 is installed at the rear of the left rear seat of the vehicle. The second rear speaker 46 is installed behind the right rear seat. Then, the first rear speaker 45 and the second rear speaker 46 are delayed left and right stereo by delaying the signal through the delay unit before the acoustic signal is input to the first rear speaker 45 and the second rear speaker 46. Outputs the signal to prevent the side effects of the sound image is located on the rear side, the rear reverberation sound is added before the sound signal is input to the first rear speaker 45 and the second rear speaker 46, and the bass band pass filtering and It performs reverberation signal processing to reproduce thrilling bass sounds, providing a surround feeling that can be felt in the theater.

Thus, the third embodiment provides all passengers with perfect stereo sound balanced left and right. That is, the third embodiment can overcome the problem of stereo sound reproduction of the conventional vehicle stereo output device as shown in FIG. 2 and fundamentally solve the problem of lack of stereo stage due to the conventional vehicle stereo output device.

The present invention can provide balanced left and right stereo sound to all passengers that could not be realized in the existing cars, and it is possible to install easily at a low cost by using the existing speaker to the maximum and installing a pair of additional speakers. In addition, when the vehicle stereo output device proposed by the present invention is applied at the stage of automobile design, automobile production that provides perfect stereo sound is possible. The present invention can provide the correct stereo stage to all passengers by placing the left and right speakers at the same distance to all passengers.

Claims (7)

In the vehicle stereo sound output device having a first speaker and a second speaker provided on the left and right sides of the front end of the vehicle and outputting stereo signals (L / R) opposed to each other, Stereo signals R / R provided on the left and right sides of the front end of the vehicle to face the first and second speakers, respectively, and are opposite to the stereo signals L / R output from the first and second speakers. And a third and fourth speakers respectively outputting L). According to claim 1, And the third speaker and the fourth speaker are installed at the same height as the first and second speakers. The method according to claim 1 or 2, The third speaker faces the left front seat of the vehicle, And the fourth speaker faces a right front seat of the vehicle. According to claim 1, And the third and fourth speakers are full-range speakers, respectively. According to claim 1, And the third speaker and the fourth speaker are two-way speakers, respectively. According to claim 1, And the third speaker and the fourth speaker are tweeters, respectively. According to claim 1, And the third speaker and the fourth speaker are coaxial speakers, respectively.