CN217825339U

CN217825339U - Vehicle-mounted audio system and vehicle

Info

Publication number: CN217825339U
Application number: CN202221397947.7U
Authority: CN
Inventors: 李洋; 牛兴; 陈新颖; 魏鹏江
Original assignee: Shanghai Jusheng Technology Co Ltd
Current assignee: Beijing Didi Infinity Technology and Development Co Ltd
Priority date: 2022-05-30
Filing date: 2022-05-30
Publication date: 2022-11-15
Anticipated expiration: 2032-05-30

Abstract

The embodiment of the utility model discloses vehicle-mounted audio system and vehicle, vehicle-mounted audio system includes audio processing circuit, first power amplifier and at least one second power amplifier; the audio processing circuit has at least one first output and at least one second output; the input end of the first power amplifier is connected with the first output end; the second power amplifier and the first power amplifier are arranged at intervals, and the input end of the second power amplifier is connected with the second output end. Through setting up the first power amplifier and the second power amplifier that the interval set up, a plurality of speakers in the speaker array of the vehicle that can be convenient for can be connected with first power amplifier or second power amplifier according to the line convenience and the needs of drive effect, can promote the convenience of vehicle wiring from this and shorten the line length between power amplifier and the speaker, reduce the impedance of audio line to be favorable to guaranteeing the vocal quality of speaker array.

Description

Vehicle-mounted audio system and vehicle

Technical Field

The utility model relates to the field of vehicle technology, concretely relates to on-vehicle audio system and vehicle.

Background

Speaker arrays with multiple speakers are often used for three-dimensional sound reproduction in vehicles, and conventional speaker arrays require more wiring work. When the speaker is excited to vibrate by the excitation signal of the power amplifier, even if the excitation signal is stopped, the vibration of the speaker is not immediately stopped, but gradually attenuated until stopped, which may cause interference with the following sound excitation signal. Meanwhile, in the process, the voice coil of the loudspeaker cuts magnetic lines of force, so that the loudspeaker itself becomes a power supply, the voice coil, the power amplifier and the connected audio line form a loop to generate current, the force generated by the current under the action of the magnetic field acts on the voice coil, and the process of damping the vibration of the voice coil is slowed (namely damping is generated). Thus, the smaller the impedance at the output of the power amplifier, the shorter the attenuation process of the speaker, and the less distortion the human subjectively experiences when listening to sound. In practical applications, for the speaker, the smaller the impedance of the power amplifier and the audio line, the greater the energy consumption, and the better the damping effect. The impedance of the audio line is related to the material, the length and the sectional area of the audio line, wherein the impedance of the audio line is positively related to the length and negatively related to the impedance coefficient of the material of the sectional area audio line. However, the audio cable made by using a material having a smaller impedance coefficient increases cost, and consumes more material, weight, and cost by increasing the sectional area of the audio cable.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the utility model is to provide an on-vehicle audio system and vehicle can solve the above-mentioned one or more defects that exist among the prior art.

In a first aspect, an embodiment of the present invention provides a vehicle audio system, including an audio processing circuit, a first power amplifier, and at least one second power amplifier; the audio processing circuit has at least one first output and at least one second output; the input end of the first power amplifier is connected with the first output end; the second power amplifier and the first power amplifier are arranged at intervals, and the input end of the second power amplifier is connected with the second output end. Through setting up the first power amplifier and the second power amplifier that the interval set up, a plurality of speakers that can be convenient for the vehicle can be connected with first power amplifier or second power amplifier according to the line convenience and the needs of drive effect, can promote the convenience of vehicle wiring from this and shorten the line length between power amplifier and the speaker, reduce the impedance of audio line to be favorable to guaranteeing the vocal quality of speaker.

In some embodiments, the in-vehicle audio system includes a host, the audio processing circuit and the first power amplifier are disposed within the host, and the second power amplifier is disposed outside the host. Through the arrangement, the integration level of the vehicle-mounted audio system can be improved, the connection length of the loudspeakers at different positions of the vehicle and the power amplifier can be further shortened, and the sound production quality of the loudspeakers can be further ensured.

In some embodiments, the host includes a housing, the audio processing circuit and first power amplifier are disposed within the housing, and the second power amplifier is disposed outside the housing; the host is provided with a plurality of connecting ports, the connecting ports are arranged on the shell, and the connecting ports comprise at least one first connecting port and at least one second connecting port; the first connection port is connected with a corresponding output channel of the first power amplifier; the second connecting port is connected with the second output end; wherein an input of the second power amplifier is connected with the second output via the second connection port. With this arrangement, the connection of the car audio system to the speaker can be facilitated.

In a second aspect, an embodiment of the present invention further provides a vehicle, including a vehicle main body, a speaker array, and a vehicle audio system; the speaker array is arranged on the vehicle body and comprises at least one first speaker and at least one second speaker; the vehicle-mounted audio system is arranged on the vehicle main body and comprises an audio processing circuit, a first power amplifier and at least one second power amplifier; the audio processing circuit has at least one first output and at least one second output; the input end of the first power amplifier is connected with the first output end; the second power amplifier and the first power amplifier are arranged at intervals, and the input end of the second power amplifier is connected with the second output end; wherein the first power amplifier has at least one first output channel, and the first speaker is connected with the corresponding first output channel; the second power amplifier is provided with at least one second output channel, and the second loudspeaker is connected with the corresponding second output channel. Through setting up the first power amplifier and the second power amplifier that the interval set up, a plurality of speakers in the speaker array of the vehicle that can be convenient for can be connected with first power amplifier or second power amplifier according to the line convenience and the needs of drive effect, can promote the convenience of vehicle wiring from this and shorten the line length between power amplifier and the speaker, reduce the impedance of audio line to be favorable to guaranteeing the vocal quality of speaker array.

In some embodiments, the distance between at least one of the first speakers and the first power amplifier is smaller than the distance between at least one of the first speakers and the second power amplifier; and/or the distance between at least one second loudspeaker and the second power amplifier is smaller than the distance between at least one second loudspeaker and the first power amplifier. Through the arrangement, the connection length of the loudspeaker and the power amplifier at different positions of the vehicle can be further shortened, and the sound production quality of the loudspeaker can be further ensured.

In some embodiments, the vehicle body has two B-pillars disposed opposite each other; the main machine and the first loudspeaker are arranged in front of the B column; the second power amplifier and the second speaker are disposed on the B-pillar or behind the B-pillar. Through the arrangement, the audio line wiring is more reasonable, the connection length of the audio lines of the speakers at different positions of the vehicle and the power amplifier is further shortened, and the sound production quality of the speakers is further guaranteed.

In some embodiments, the second power amplifier further has at least one third output channel; the loudspeaker array also comprises at least one third loudspeaker which is arranged in front of the B column and is connected with the corresponding third output channel. By this arrangement, the sound quality of the speaker array can be further improved.

In some embodiments, the second power amplifier further has at least one third output channel; the loudspeaker array further comprises at least one third loudspeaker, the third loudspeaker is connected with the corresponding third output channel, and the distance between the third loudspeaker and the second power amplifier is larger than the distance between the third loudspeaker and the first power amplifier. By this arrangement, the sound quality of the speaker array can be further improved.

In some embodiments, the number of output channels of the second power amplifier is greater than the number of output channels of the first power amplifier. Through the arrangement, the heat dissipation performance and the working stability of the vehicle-mounted audio system are guaranteed.

In some embodiments, a distance between the third speaker and the second power amplifier is smaller than a distance between the first speaker and the second power amplifier. Through the arrangement, the arrangement is beneficial to more reasonable audio line wiring, the connection length of the audio lines of the loudspeakers at different positions of the vehicle and the power amplifier is further shortened, and the sounding quality of the loudspeakers is further ensured.

In some embodiments, the host includes a housing, the audio processing circuit and the first power amplifier are disposed within the housing, and the second power amplifier is disposed outside the housing; the host is provided with a plurality of connecting ports, the connecting ports are arranged on the shell, and the connecting ports comprise at least one first connecting port and at least one second connecting port; the first connecting port is connected with the corresponding first output channel; the second connection port is connected with the second output end; wherein the input of the second power amplifier is connected with the second output via the second connection port. With this arrangement, the connection of the car audio system to the speaker can be facilitated.

In some embodiments, the number of the second power amplifiers is at least two, and at least two of the second power amplifiers are arranged at intervals. Through the arrangement, the arrangement is beneficial to more reasonable audio line wiring, the connection length of the audio lines of the loudspeakers at different positions of the vehicle and the power amplifier is further shortened, and the sounding quality of the loudspeaker array is further ensured.

In some embodiments, the first power amplifier is disposed at an instrument desk of the vehicle body, and the at least one second power amplifier is disposed at a back panel of the vehicle body. Through this kind of setting, be favorable to making audio frequency line wiring more reasonable.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

FIG. 1 is a schematic structural diagram of a vehicle according to an embodiment of the present invention

Fig. 2 is a block diagram schematically illustrating a structure of a car audio system according to an embodiment of the present invention;

FIG. 3 is a schematic block diagram of the connection of a vehicle audio system and a speaker array according to one embodiment of the present invention;

FIG. 4 is a schematic diagram of an arrangement of a car audio system and a speaker array according to an embodiment of the present invention;

FIG. 5 is a schematic block diagram of the connection of an in-vehicle audio system and a speaker array of another embodiment of the present invention;

FIG. 6 is a schematic diagram of an arrangement of a car audio system and a speaker array according to another embodiment of the present invention;

fig. 7 is a schematic diagram of the arrangement of the car audio system and the speaker array of a comparative embodiment.

Description of reference numerals:

a-a vehicle audio system;

100-a host; 110-a control circuit; 120-audio processing circuitry; 130-a first power amplifier;

200-a second power amplifier;

300-a vehicle body; 310-B column; 320-a seat; 330-front door; 340 rear door

400-a speaker array; 410-a first speaker; 420-a second speaker; 430-a third speaker;

500-audio line;

600-a vehicle body; 610-a post power amplifier; 620a, 620 b-front speakers; a 630-B column; 640-audio line.

Detailed Description

The present invention will be described below based on examples, but the present invention is not limited to only these examples. In the following detailed description of the present invention, certain specific details are set forth in detail. It will be apparent to those skilled in the art that the present invention may be practiced without these specific details. Well-known methods, procedures, components and circuits have not been described in detail so as not to obscure the present invention.

Furthermore, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.

Unless the context clearly requires otherwise, throughout this specification, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, what is meant is "including, but not limited to".

In the description of the present invention, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

Fig. 1, 3-6 show schematic structures of vehicles according to some embodiments of the present invention. Referring to fig. 1, 3-6, a vehicle according to an embodiment of the present invention includes a vehicle main body 300, a speaker array 400, and an in-vehicle audio system a.

The vehicle body 300 may include a frame, wheels, and other necessary structures (not shown in detail) that enable the vehicle to perform passenger transport and/or cargo transport functions. In some embodiments, the vehicle body 300 may have a passenger compartment for providing a space in which a driver and/or a passenger may be accommodated. At least one seat 320 is provided in the passenger compartment for seating a driver and/or a passenger. The vehicle body 300 may be in the form of a passenger vehicle, a freight vehicle, or a passenger-cargo dual-purpose vehicle; the vehicle can be a fuel vehicle, a new energy vehicle, a hybrid vehicle or a vehicle driven by other modes. The embodiment of the present invention does not limit the form of the vehicle body 300.

The speaker array 400 is provided on the vehicle body 300 for playing sound. The speaker array 400 includes a plurality of

speakers

410, 420, 430, and the plurality of

speakers

410, 420, 430 may be respectively disposed at different positions of the vehicle body 300 and may have the same or different orientations. In some embodiments, the plurality of

speakers

410, 420, 430 of the speaker array 400 may be directed toward the passenger compartment to create a sound field within the passenger compartment to provide the driver or passenger with audio entertainment or information reporting capabilities.

The car audio system a is disposed in the vehicle body 300 and connected to the speaker array 400, and is configured to send a corresponding excitation signal to the speaker array 400 to drive at least one

speaker

410, 420, 430 in the speaker array 400 to emit sound. In an embodiment of the present invention, the car audio system a may be part of an In-Vehicle Infotainment (IVI) system. The embodiment of the utility model provides an in, the IVI system is based on the on-vehicle integrated information processing system that vehicle body bus system and internet service formed, coordinates and controls on-vehicle automatically controlled information entertainment equipment through on-vehicle Electronic Control Unit (ECU) and corresponding operating system to realize three-dimensional navigation, real-time road conditions, auxiliary driving, fault detection, vehicle information, automobile body control, wireless communication, amusement or other corresponding functions. The ECU may include one or more chips.

Fig. 2 is a block diagram illustrating a structure of a car audio system according to an embodiment of the present invention.

Referring to fig. 2 to 6, in the present embodiment, the car audio system a includes at least two

power amplifiers

130, 200, including at least one first power amplifier 130 and at least one second power amplifier 200. The first power amplifier 130 and the second power amplifier 200 are spaced apart from each other, that is, the first power amplifier 130 and the second power amplifier 200 may be disposed at different positions of the vehicle body 300, respectively. When the number of the

speakers

410, 420 and 430 in the speaker array 400 is large, the plurality of

power amplifiers

130 and 200 are respectively connected with the corresponding

speakers

410, 420 and 430 to drive the

speakers

410, 420 and 430, so that the vehicle-mounted audio system a can drive

more speakers

410, 420 and 430 to sound, the speaker array 400 can generate better sound effect, and the riding experience of a driver and passengers is improved. Meanwhile, each

speaker

410, 420, 430 in the speaker array 400 may be connected to one

power amplifier

130, 200 that is more convenient to connect according to the convenience degree when being connected to a

different power amplifier

130, 200, so as to facilitate routing of the audio line 500 between the

speaker

410, 420, 430 and the

corresponding power amplifier

130, 200.

The car audio system a also includes an audio processing circuit 120. The audio processing circuit 120 is configured to process the audio information and generate and output an audio electrical signal suitable for processing by the

power amplifiers

130 and 200, where the output audio electrical signal may be a digital signal or an analog signal, and may be selected according to models of the first power amplifier 130 and the second power amplifier 200. Audio processing circuit 120 may include an Audio Digital Signal Processor (Audio DSP). The audio processing circuit 120 processes the sound information, including but not limited to decoding, filtering, multi-channel processing, mixing, gain adjustment, sound field balancing, and so on. The

power amplifiers

130, 200 are connected to corresponding

speakers

410, 420, 430 in the speaker array 400, and the

power amplifiers

130, 200 amplify the audio electrical signals received from the audio processing circuit 120 to generate excitation signals to drive one or

more speakers

410, 420, 430 in the speaker array 400 to emit sound.

In some embodiments, the audio processing circuit 120 comprises at least one first output connected to an input of the first power amplifier 130 and at least one second output connected to an input of the second power amplifier 200. The audio electrical signal processed by the audio processing circuit 120 may be sent to the first power amplifier 130 via the first output terminal for signal amplification processing, and/or sent to the second power amplifier 200 via the second output terminal for signal amplification processing.

In some embodiments, the car audio system a further includes a control circuit 110. The control circuit 110 may be used to control the operation of the audio processing circuit 120 and/or the

power amplifiers

130, 200. The control circuit 110 may include a processor and a memory, the processor being electrically connected to the memory. The memory may be used to store sound information and/or control programs corresponding to the in-vehicle audio system a. The control circuit 110 may be partially or wholly integrated in the vehicle ECU or may be relatively independent of the vehicle ECU. The control circuit 110 may be electrically connected to the memory and the audio processing circuit 120, and the control circuit 110 may acquire predetermined one or more pieces of sound information from the sound information stored in the memory and transmit the predetermined one or more pieces of sound information to the audio processing circuit 120; the audio processing circuit 120 processes the received sound information and sends the processed sound information to the first power amplifier 130 and/or the second power amplifier 200.

In some embodiments, referring to fig. 3 and 5, the car audio system a includes the host 100, the audio processing circuit 120 and the first power amplifier 130 are disposed in the host 100, and the second power amplifier 200 is disposed outside the host 100. Alternatively, the host 100 may be partially or entirely integrated in the vehicle ECU. In one embodiment, the host 100 includes a housing, the audio processing circuit 120 and the first power amplifier 130 are disposed within the housing, and the second power amplifier 200 is disposed outside the housing. When the car audio system a includes the control circuit 110, the control circuit 110 may also be provided in the housing. The housing may be a separate housing for enclosing the control circuit 110, the audio processing circuit 120, and the first power amplifier 130, or may be a housing common to other circuits or devices of the IVI system (e.g., a housing common to a vehicle ECU).

The host 100 may have a plurality of connection ports provided on the housing to facilitate signal connection of the host 100 to the second power amplifier 200 and/or the

respective speakers

410, 420, 430 through the audio line 500. The connection port may be a connector that allows the audio cable 500 to be connected by plugging, which may facilitate the arrangement and installation of the car audio system a on the vehicle main body 300; the connection port may be a port that is connected to the audio line 500 in a non-detachable manner, so as to ensure stability of signal transmission.

In some embodiments, the plurality of connection ports of the host 100 includes at least one first connection port, the first connection port is connected with the corresponding output channel of the first power amplifier 130, and the one or

more speakers

410, 420, 430 of the speaker array 400 may be connected with the first connection port using the audio line 500, thereby enabling connection with the first power amplifier 130.

In some embodiments, the plurality of connection ports of host 100 further includes at least one second connection port, the second connection port being connected to a second output of audio processing circuit 120. The input of the second power amplifier 200 may be connected to the second connection port using the audio line 500, so as to realize the connection between the second power amplifier 200 and the second output of the audio processing circuit 120.

The main unit 100 and the second power amplifier 200 may be disposed at different positions of the vehicle body 300, respectively. For example, in one embodiment, the main unit 100 is disposed at the front of the vehicle and in front of the passenger compartment (e.g., may be disposed in the instrument panel of the vehicle body 300), and the second power amplifier 200 is disposed at the rear of the vehicle and behind the passenger compartment (e.g., may be disposed at the back panel of the vehicle body 300). Therefore, under the condition that the internal space of the host 100 is limited or the heat dissipation capacity is limited, the total output channel number of the

power amplifiers

130 and 200 of the vehicle-mounted audio system a can be increased by arranging the second power amplifier 200, and

more speakers

410, 420 and 430 can be driven, so that the speaker array 400 can realize better sound effect. In the present application, the "front" is the same as the forward direction of the vehicle, and the "rear" is the same as the backward direction of the vehicle.

In some embodiments, the number of output channels of the second power amplifier 200 is greater than the number of output channels of the first power amplifier 130. Since the more heat is generated by the

power amplifiers

130, 200 as the number of channels increases, the higher the requirements for heat dissipation conditions are accordingly. Meanwhile, since the internal space of the main body 100 is limited and other electrical components are often disposed around the location where the first power amplifier 130 is installed, the heat dissipation condition is relatively weak. And the second power amplifier 200 is disposed outside the main unit 100, and may be installed at the rear portion of the vehicle body 300 (e.g., at the side rear portion of the vehicle body 300) or other locations with a large space, so as to have a good heat dissipation condition. Therefore, the second power amplifier 200 has more output channels, and the first power amplifier 130 has relatively fewer output channels, so that the overall driving sound-producing effect of the speaker array 400 is ensured, the heat dissipation of the first power amplifier 130 and even the entire host 100 is facilitated, and the working stability of the car audio system a and the speaker array 400 is ensured. For example, taking a 12-output-channel car audio system as an example, the first power amplifier 130 may set 5 output channels, and the second power amplifier 130 may set 7 output channels.

It is understood that the number of output channels of the first power amplifier 130 may be equal to or greater than the number of output channels of the second power amplifier 200 in the case where the first power amplifier 130 and/or the host 100 has good heat dissipation conditions or the number of

speakers

410, 420, 430 in the speaker array 400 is small.

The speaker array 400 includes at least one first speaker 410 and at least one second speaker 420. The first speaker 410 is connected to a corresponding first output channel of the first power amplifier 130, and the second speaker 420 is connected to a corresponding second output channel of the second power amplifier 200.

Referring to fig. 4 and 6, the first speaker 410 and the second speaker 420 are provided at different positions in the vehicle body 300. In some embodiments, the distance between the at least one first speaker 410 and the host 100 is less than the distance between the at least one first speaker and the second power amplifier 200. Therefore, when the first speaker 410 is connected to the first power amplifier 130 of the host 100, the length of the audio line 500 between the first speaker 410 and the host 100 can be shortened, so that the extra impedance caused by the increase of the length of the audio line 500 can be reduced, and the first speaker 410 has better sound effect.

In some embodiments, the distance between the at least one second speaker 420 and the second power amplifier 200 is less than the distance to the host 100. Therefore, when the second speaker 420 is connected to the second power amplifier 200, the length of the audio line 500 between the second speaker 420 and the second power amplifier 200 can be shortened, so that the extra impedance caused by the increase of the length of the audio line 500 can be reduced, and the second speaker 420 has better sound effect.

Preferably, the distance between the first speaker 410 and the host 100 is smaller than the distance between the first speaker and the second power amplifier 200, and the distance between the second speaker 420 and the second power amplifier 200 is smaller than the distance between the first speaker and the host 100. That is, one or

more speakers

410, 420, 430 of the speaker array 400 near the host 100 may be connected to the first power amplifier 130 as a first speaker 410, and one or

more speakers

410, 420, 430 of the speaker array 400 other than the first speaker 410 and near the second power amplifier 200 may be connected to the second power amplifier 200 as a second speaker 420.

By grouping the plurality of

speakers

410, 420, 430 in the speaker array 400 according to the distance between the first power amplifier 130 and the second power amplifier 200 and connecting the speakers with the

power amplifier

130 or 200 having a relatively short distance, the audio line 500 connecting the first speaker 410 and the second speaker 420 with the

corresponding power amplifier

130 or 200 can be effectively ensured to be short, the extra impedance caused by the increase of the length of the audio line 500 can be reduced, so that the

speakers

410, 420, 430 arranged at different positions of the vehicle body 300 can be ensured to have a better damping effect, and the overall sound effect of the speaker array 400 can be ensured. Simultaneously, compare with the sectional area that increases audio line 500 or the audio line 500 that makes using the material that the resistivity is less, the embodiment of the utility model provides a mode through shortening audio line 500 length reduces audio line 500 impedance, is favorable to reduce cost.

Referring to fig. 4 and 6, in one application scenario, two rows of seats 320, a front row of seats 320 and a rear row of seats 320, are provided in the passenger compartment. The vehicle body 300 has two B-pillars 310, the two B-pillars 310 being oppositely disposed on left and right sides of the vehicle body 300, and the front-row seat 320 and the rear-row seat 320 being disposed substantially in front of and behind the B-pillars 310, respectively. The vehicle body 300 can be roughly divided into front and rear parts by using the position of the B-pillar 310 as a boundary line, wherein the region in front of the B-pillar 310 is the front part of the vehicle body 300, and the regions behind the B-pillar 310 and the B-pillar 310 are the rear parts of the vehicle body 300. In one embodiment, the host 100 and the first speaker 410 are disposed in front of the B-pillar 310, and the second power amplifier 200 and the second speaker 420 are disposed on the B-pillar 310 or behind the B-pillar 310 to facilitate routing of the audio line 500 and to ensure that each

speaker

410, 420, 430 in the speaker array 400 can be connected to the

corresponding power amplifier

130 or 200 in a relatively short wiring. For example, the first speaker 410 may be provided at the front door 330 of the vehicle body 300 and in front of the front seat 320 (e.g., on an instrument desk), and the second speaker may be provided at the rear door 340 of the vehicle body 300, in the rear of the rear seat 320, and in a rear position of other passenger compartments. Of course, when the passenger compartment is long and includes two or more rows of seats 320, other configurations of the vehicle body 300 may be used as a basis for grouping the plurality of

speakers

410, 420, 430 in the speaker array 400.

The second power amplifier 200 may be one or more. When there are a plurality of second power amplifiers 200, the plurality of second power amplifiers 200 may be disposed at different positions of the vehicle body 300 at intervals, and each second power amplifier 200 may be connected to a corresponding one or

more speakers

410, 420, and 430, respectively. Preferably, each second power amplifier 200 may be connected to one or

more speakers

410, 420, 430 with a shorter distance according to the distance between each second power amplifier 200 and the plurality of

speakers

410, 420, 430, so that the length of the audio line 500 between the second power amplifier 200 and the

speakers

410, 420, 430 may be shortened, thereby reducing the impedance of the audio line 500 and enabling the

speakers

410, 420, 430 to have a better sound-producing effect. For example, the passenger compartment may be divided into three regions of a front portion, a left rear portion, and a right rear portion, the first power amplifier 130 and the first speaker 410 being disposed corresponding to the front portion of the passenger compartment; the two second power amplifiers 200 are provided, and the two second power amplifiers 200 are respectively provided corresponding to the left and right rear portions of the passenger compartment and are respectively connected to the

speakers

410, 420, 430 in the corresponding areas.

In order to enable the speaker array 400 to create a better sound field and to ensure that the passengers can hear better sound effects at various locations within the passenger compartment, a larger number of

speakers

410, 420, 430 may be generally arranged and/or a plurality of different types of

speakers

410, 420, 430 (e.g., tweeters, woofers, and surround speakers) may be provided within a range of several predetermined regions of the vehicle body 300. Thus, the

respective power amplifiers

130, 200 are required to provide the corresponding output channels to drive the

speakers

410, 420, 430, and the total output channels of the first power amplifier 130 and the second power amplifier 200 are larger in number.

Referring to fig. 5 and 6, in some embodiments, the second power amplifier 200 further has at least one third output channel, and the speaker array 400 further includes a third speaker 430, the third speaker 430 being connected to the corresponding third output channel. In one embodiment, the second power amplifier 200 is disposed on the B-pillar 310 or behind the B-pillar 310, and the third speaker 430 is disposed in front of the B-pillar 310. In another embodiment, the third speaker 430 is spaced from the second power amplifier 200 by a distance greater than the first power amplifier 130. Since the second power amplifier 200 is disposed outside the main unit 100, which is advantageous for better heat dissipation, in a case where a greater number of

speakers

410, 420, and 430 are disposed in a certain region of the passenger compartment, some of the

speakers

410, 420, and 430 disposed in the region or relatively distant from the second power amplifier 200 may be connected to the second power amplifier 200, which is advantageous for ensuring the overall heat dissipation effect and operation stability of the car audio system a.

Alternatively, the speaker (e.g., the first speaker 410) closest to the first power amplifier 130 and/or having the shortest routing length of the audio line 500 with the first power amplifier 130 may be connected to the first power amplifier 130, and the remaining

speakers

420, 430 may be connected to the second power amplifier 200, depending on the number of output channels of the first power amplifier 130; that is, the distance between the third speaker 430 and the second power amplifier 200 is smaller than the distance between the first speaker 410 and the second power amplifier 200. Alternatively, in the case where the output channel of the first power amplifier 130 is insufficient to drive all the

speakers

410, 420, and 430 having a short wiring distance, some of the

speakers

410, 420, and 430 having relatively low requirements for sound emission quality may be connected as the third speaker 430 to the third output channel of the second power amplifier 200. Therefore, a better balance can be achieved between the two effects of ensuring the heat dissipation and ensuring the sound quality of the

speakers

410, 420 and 430.

Fig. 7 is a schematic view of a vehicle of a comparative embodiment. Referring to fig. 7, in this comparative embodiment, the car audio system a includes only one external power amplifier 610 provided at the rear of the vehicle body 600. The number and distribution positions of the

speakers

620a, 620b in the speaker array of the vehicle are the same as in fig. 6. As can be seen from comparing fig. 6 and 7, the audio line 500 between the first speaker 410 and the corresponding power amplifier (i.e., the first power amplifier 130) of the vehicle according to the embodiment of the present invention shown in fig. 6 is shorter than the audio line 640 between the front speakers 620a and 620B disposed in front of the B-pillar 630 and the rear power amplifier 630 of the comparative embodiment shown in fig. 7. Taking one speaker provided at the meter desk in the front of the

vehicle body

300, 600 as an example, in the same vehicle model, the length of the audio line 640 between the front speaker 620a and the rear power amplifier 630 of the comparative example is about 5 meters, while the length of the audio line 500 between the first speaker 410 and the first power amplifier 130 at the corresponding position in fig. 6 is about 0.5 meters, and the lengths of the audio lines of the two ways are different by about 4.5 meters, the sound emission effects of the corresponding

speakers

620a and 410 will be greatly different. Therefore, the utility model discloses technical scheme can shorten the line distance of walking of speaker effectively, reduces the impedance of audio line for speaker array 400 can have better damping effect and sound production effect.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. An in-vehicle audio system, comprising:

an audio processing circuit having at least one first output and at least one second output;

the input end of the first power amplifier is connected with the first output end; and

and the at least one second power amplifier is arranged at an interval with the first power amplifier, and the input end of the second power amplifier is connected with the second output end.

2. The car audio system of claim 1, wherein the car audio system comprises a host, the audio processing circuit and the first power amplifier are disposed within the host, and the second power amplifier is disposed outside the host.

3. The car audio system of claim 2, wherein the host includes a housing, the audio processing circuit and first power amplifier being disposed within the housing, the second power amplifier being disposed outside the housing;

the host has a plurality of connection ports provided in the housing, the plurality of connection ports including:

at least one first connection port connected with a corresponding output channel of the first power amplifier; and

at least one second connection port connected to the second output;

wherein an input of the second power amplifier is connected with the second output via the second connection port.

4. A vehicle, characterized by comprising:

a vehicle main body;

a speaker array disposed at the vehicle body, the speaker array including at least one first speaker and at least one second speaker; and

an in-vehicle audio system provided to the vehicle main body, the in-vehicle audio system including:

the at least one second power amplifier is arranged at an interval with the first power amplifier, and the input end of the second power amplifier is connected with the second output end;

wherein the first power amplifier has at least one first output channel, and the first speaker is connected with the corresponding first output channel;

the second power amplifier is provided with at least one second output channel, and the second loudspeaker is connected with the corresponding second output channel.

5. The vehicle of claim 4, characterized in that the distance between at least one of the first speakers and the first power amplifier is smaller than the distance between the at least one of the first speakers and the second power amplifier; and/or

The distance between at least one of the second speakers and the second power amplifier is smaller than the distance between the at least one of the second speakers and the first power amplifier.

6. The vehicle of claim 4, wherein the in-vehicle audio system includes a host machine, the audio processing circuit and the first power amplifier being disposed within the host machine, the second power amplifier being disposed outside of the host machine.

7. The vehicle of claim 6, characterized in that the vehicle body has two oppositely disposed B-pillars;

the main machine and the first loudspeaker are arranged in front of the B column;

the second power amplifier and the second speaker are disposed on the B-pillar or behind the B-pillar.

8. The vehicle of claim 7, characterized in that the second power amplifier further has at least one third output channel; the speaker array further comprises:

and the at least one third loudspeaker is arranged in front of the B column and is connected with the corresponding third output channel.

9. The vehicle of claim 4, characterized in that the second power amplifier further has at least one third output channel; the speaker array further comprises:

at least one third speaker, the third speaker is connected with the corresponding third output channel, and the distance between the third speaker and the second power amplifier is greater than the distance between the third speaker and the first power amplifier.

10. The vehicle of any of claims 4-9, characterized in that the number of output channels of the second power amplifier is greater than the number of output channels of the first power amplifier.

11. The vehicle according to claim 8 or 9, characterized in that a distance between the third speaker and the second power amplifier is smaller than a distance between the first speaker and the second power amplifier.

12. The vehicle of claim 6, wherein the host machine includes a housing, the audio processing circuit and first power amplifier being disposed within the housing, the second power amplifier being disposed outside the housing;

the host has a plurality of connection ports, the connection ports are provided in the housing, the plurality of connection ports include:

at least one first connection port connected with the corresponding first output channel; and

at least one second connection port connected to the second output;

wherein the input of the second power amplifier is connected with the second output via the second connection port.

13. The vehicle of claim 4, characterized in that the second power amplifiers are at least two, at least two of the second power amplifiers being spaced apart from each other.

14. The vehicle according to claim 4, characterized in that the first power amplifier is provided to an instrument desk of the vehicle body, and at least one of the second power amplifiers is provided to a back panel of the vehicle body.