Car audio systems and vehicles

Abstract

This application provides a vehicle audio system and a vehicle. The vehicle audio system includes a first speaker, which comprises a housing and a diaphragm. The diaphragm is disposed within the housing, and a rear acoustic cavity is formed behind the diaphragm. The housing has a guide hole communicating with the rear acoustic cavity. The first speaker is mounted inside the vehicle body, with the front of the diaphragm facing the passenger compartment, and the guide hole communicating with an external speaker outlet. When the first speaker operates, the diaphragm generates forward and backward sound waves. The forward sound waves can be conducted to the passenger compartment inside the vehicle to play audio into the vehicle, while the backward sound waves can be conducted through the rear acoustic cavity and the guide hole to the external speaker outlet to play audio outside the vehicle. The first speaker not only supports audio playback inside the vehicle but also supports audio playback outside the vehicle. This eliminates the need for additional hardware such as multiple dedicated external speakers in the vehicle to achieve external playback functionality, reducing the occupation of interior space and lowering vehicle development costs.

Description

Technical Field

[0001] This application relates to the field of vehicle audio technology, and more particularly to a vehicle audio system and vehicle. Background Technology

[0002] Currently, user demand for vehicle audio functions has expanded from traditional in-car entertainment to diverse scenarios, with external audio playback being one of the most popular. However, traditional in-car audio systems often only provide an excellent audio experience for in-car users, making it difficult to extend the audio system to the outside of the vehicle. To address this issue, some vehicles are equipped with dedicated external audio systems, consisting of multiple speakers installed on the exterior of the vehicle. However, this design requires adding multiple additional speakers specifically for external playback within the vehicle, which not only occupies more installation space but also increases development costs. Utility Model Content

[0003] In view of this, a vehicle audio system and vehicle are provided that can solve the problem of insufficient lubrication of the transmission mechanism under extreme tilt angles, thereby reducing the risk of failure.

[0004] The first aspect of this application provides a vehicle audio system, which is applied to a vehicle. The vehicle includes a vehicle body with a passenger compartment inside. An external speaker is provided on the outside of the vehicle body. The vehicle audio system includes a first speaker, which includes a housing and a diaphragm. The diaphragm is disposed within the housing, and a rear acoustic cavity is formed behind the diaphragm. The housing has a guide hole that communicates with the rear acoustic cavity. The first speaker is installed inside the vehicle body, and the front of the diaphragm faces the passenger compartment to play audio into the vehicle. The guide hole communicates with the external speaker to play audio outside the vehicle.

[0005] In some embodiments, the first speaker further includes a guide tube connected to the outside of the housing, one end of the guide tube communicating with a guide hole and the other end of the guide tube communicating with an external speaker port.

[0006] In some embodiments, the first speaker is mounted on the rear side of the vehicle body.

[0007] In some embodiments, the vehicle audio system further includes a second speaker for mounting on the vehicle body, wherein the frequency band corresponding to the first speaker is lower than the frequency band corresponding to the second speaker.

[0008] In some embodiments, the first loudspeaker includes one or more combinations of a low-frequency loudspeaker and an ultra-low-frequency loudspeaker.

[0009] In some embodiments, the second loudspeaker includes one or more combinations of a mid-frequency loudspeaker, a mid-high frequency loudspeaker, and a full-range loudspeaker.

[0010] In some embodiments, the second speaker is mounted on the front side of the vehicle body and located outside the passenger compartment.

[0011] In some embodiments, the vehicle audio system further includes a head unit, and both the first speaker and the second speaker are electrically connected to the head unit. The head unit is used to divide the audio source signal into frequencies to obtain a first audio signal and a second audio signal corresponding to different frequency bands. The first speaker is used to emit sound in response to the first audio signal, and the second speaker is used to emit sound in response to the second audio signal.

[0012] The second aspect of this application provides a vehicle, which includes a vehicle body and the vehicle audio system provided in the first aspect. The vehicle body has a passenger compartment, and an external speaker is provided on the outside of the vehicle body. A first speaker is installed in the vehicle body, with the front of the diaphragm facing the passenger compartment to play audio into the vehicle. A guide hole communicates with the external speaker to play audio out of the vehicle.

[0013] In some embodiments, a wheel arch cover is provided at the bottom of the vehicle body, and an external speaker is opened in the wheel arch cover; a first speaker is installed on the rear side of the vehicle body, and the first speaker is provided with a guide tube, one end of the guide tube is connected to a guide hole, and the other end of the guide tube is connected to the external speaker.

[0014] The in-vehicle audio system and vehicle provided in this application, when the first speaker is working, the diaphragm generates forward and backward sound waves. The forward sound waves can be conducted to the passenger compartment inside the vehicle to play audio inside, while the backward sound waves can be conducted through the rear acoustic cavity and the guide port to the external speaker port to play audio outside the vehicle. Thus, the first speaker can not only support audio playback inside the vehicle but also support audio playback outside the vehicle, eliminating the need for additional hardware such as multiple dedicated external speakers in the vehicle to achieve the external playback function, reducing the occupation of interior space resources and lowering vehicle development costs. Furthermore, the design of connecting the rear acoustic cavity to the outside of the vehicle through the guide port allows the backward sound waves to be conducted to the outside of the vehicle while the forward sound waves are conducted to the inside, reducing the cancellation caused by the out-of-phase nature of the forward and backward sound waves and preventing acoustic short circuits. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a vehicle audio system provided in an embodiment of this application.

[0016] Figure 2 This is a first structural schematic diagram of a vehicle provided in an embodiment of this application.

[0017] Figure 3 This is a schematic diagram of the second structure of a vehicle provided in an embodiment of this application.

[0018] Figure 4 This is a first flowchart illustrating the control method for a vehicle audio system provided in an embodiment of this application.

[0019] Figure 5 This is a second flowchart illustrating the control method for a vehicle audio system provided in an embodiment of this application.

[0020] Explanation of main component symbols

[0021] 100. Vehicle audio system; 10. First speaker; 11. Housing; 12. Diaphragm; 13. Rear acoustic cavity; 14. Guide hole; 15. Guide tube; 20. Second speaker; 30. Head unit; 200. Vehicle body; 201. Passenger compartment; 202. Engine compartment; 203. Trunk; 204. External speaker outlet; 205. Wheel arch cover; 206. Wheel. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] In the description of this application, it should be understood that the terms "upper," "lower," "inner," "outer," "side," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the equipment or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0024] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0025] Before providing a further detailed description of the embodiments of this application, the nouns and terms involved in the embodiments of this application will be explained, and the nouns and terms involved in the embodiments of this application shall be interpreted as follows.

[0026] A loudspeaker is a transducer that converts electrical signals into sound waves. Its core function is to drive a diaphragm to vibrate the air through electromagnetic, piezoelectric, or electrostatic effects, thereby generating audible sound waves. A typical loudspeaker consists of three main parts: a diaphragm, a magnetic circuit assembly, and a acoustic cavity. The diaphragm and magnetic circuit assembly are fixed within a housing, with the diaphragm and magnetic circuit assembly positioned opposite each other. The acoustic cavity includes a front cavity and a rear cavity. The front cavity is located in front of the diaphragm, and the housing has an outlet that communicates with the front cavity. The rear cavity is located behind the diaphragm. When the diaphragm is working, it generates forward and backward sound waves with opposite phases. The forward sound wave is amplified through the front cavity and the outlet. To address the issue of canceling amplitudes when the forward and backward sound waves overlap, leading to a significant decrease in low-frequency response, some loudspeakers are designed with a phase-reversing structure. This aligns the phase of the backward sound wave with the forward sound wave, thus increasing the gain of the forward sound wave.

[0027] Frequency band: The range of sound wave frequencies. Different loudspeakers can effectively reproduce different frequency bands of audio. According to frequency band, loudspeakers can be divided into subwoofers, low-frequency loudspeakers, mid-low frequency loudspeakers, mid-frequency loudspeakers, mid-high frequency loudspeakers, high-frequency loudspeakers, and full-range loudspeakers, etc.

[0028] In-vehicle audio system: This includes multiple speakers installed in the vehicle, controlled by a main control unit. In-vehicle audio systems can be categorized into two types based on their purpose: entertainment audio systems and pedestrian warning systems. Traditional entertainment audio systems play audio into the vehicle and consist of various speakers supporting different frequency bands. These speakers are arranged according to their sound quality; for example, subwoofers and low-frequency speakers are placed in the trunk, doors, and under the seats; high-frequency speakers are placed in the A-pillars, dashboard, and headliner; and mid-low frequency speakers, mid-frequency speakers, and mid-high frequency speakers are placed in the doors and dashboard.

[0029] The pedestrian warning system mainly consists of pedestrian warning speakers, which are usually installed in the front engine compartment, front grille, front bumper, front buffer beam, etc. of the vehicle. They are mainly used to emit warning sounds to the outside of the vehicle to compensate for the safety hazards to pedestrians caused by the quietness of electric vehicles.

[0030] Crossover and tuning: Crossover divides the full-range signal into different frequency bands to allocate them to the speakers best suited for each band, thereby optimizing sound quality and protecting speakers. Crossover methods include power crossover and electronic crossover. Tuning refers to optimizing and artistically processing sound by adjusting parameters such as frequency response and dynamic range. Examples include adjusting volume, gain, and compression range.

[0031] Response: Used to indicate the conditions or states on which the operation performed depends. When the conditions or states on which it depends are met, one or more operations performed can be performed in real time or with a set delay. Unless otherwise specified, there is no restriction on the order in which multiple operations are performed.

[0032] Some embodiments will now be described with reference to the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0033] like Figures 1 to 3 As shown, this application first provides a vehicle audio system 100, which is applied to a vehicle. The vehicle includes a body 200 and the vehicle audio system 100. The vehicle audio system 100 is disposed in the body 200, which has a passenger compartment 201. The body 200 has a front side and a rear side relative to the passenger compartment 201. The front side is the part close to the front of the vehicle, and the rear side is the part close to the rear of the vehicle. The front side of the body 200 has an engine compartment 202, and the rear side of the body 200 has a trunk 203. Doors are provided on both sides of the body 200, and external speaker openings 204 are provided on the outer side of the body 200. The outer side of the body 200 refers to the part of the body 200 outside the passenger compartment 201, such as the outer side of the doors, the underside of the chassis, or the outer side of the roof.

[0034] The vehicle audio system 100 has two operating modes: in-vehicle mode and out-of-vehicle mode. In in-vehicle mode, the vehicle audio system 100 plays audio into the vehicle, i.e., into the passenger compartment 201. In out-of-vehicle mode, the vehicle audio system 100 plays audio out of the vehicle, i.e., into the passenger compartment 201.

[0035] In this way, the application of the car audio system 100 can be extended to diverse scenarios. For example, in a normal driving scenario, the user can set the playback mode to in-car mode, and the car audio system 100 can play music into the car; in an outdoor camping scenario, the user can set the playback mode to out-of-car mode, and the car audio system 100 can play music out of the car to create a corresponding atmosphere for the activity.

[0036] In the example of this application, the vehicle also includes wheels 206 and a suspension, wherein the suspension is fixed to the bottom of the vehicle body 200, and the wheels 206 are connected to the suspension. A wheel arch cover 205 is also provided at the bottom of the vehicle body 200, the wheel arch cover 205 is correspondingly provided with the wheel 206, and the wheel arch cover 205 is located above the corresponding wheel 206.

[0037] In this embodiment, the vehicle audio system 100 includes a first speaker 10, which includes a housing 11 and a diaphragm 12. The diaphragm 12 is disposed within the housing 11, and a rear acoustic cavity 13 is formed behind the diaphragm 12. The housing 11 has a guide hole 14 communicating with the rear acoustic cavity 13. The first speaker 10 is installed inside the vehicle body 200, and the front of the diaphragm 12 faces the passenger compartment 201 to play audio into the vehicle. The guide hole 14 communicates with an external speaker 204 to play audio outside the vehicle.

[0038] It is worth noting that the front of the diaphragm 12 faces the passenger compartment 201, which means that the front of the diaphragm 12 is directly facing or diagonally facing the passenger compartment 201, so that the forward sound waves generated by the diaphragm 12 can radiate into the passenger compartment 201.

[0039] Specifically, the first loudspeaker 10 also includes a magnetic driver and a guide tube 15. The magnetic driver is disposed inside the housing 11, and the diaphragm 12 is disposed opposite to the magnetic driver. The guide tube 15 is connected to the outside of the housing 11. One end of the guide tube 15 communicates with the guide hole 14 and is fixed to the housing 11, and the other end of the guide tube 15 communicates with the external speaker port 204. The guide tube 15 establishes a sound wave conduction channel between the guide hole 14 and the external speaker port 204 to ensure that rearward sound waves can be conducted to the external speaker port 204.

[0040] The shape and length of the guide tube 15 can be set according to the relative position of the guide hole 14 and the external outlet 204. The guide tube 15 is made of a material with high rigidity and high density, including but not limited to: engineering plastics (such as ABS, PVC), metals (such as copper, aluminum, stainless steel), composite materials (such as carbon fiber), etc., to reduce the resonance of the tube wall of the guide tube 15 and reduce sound energy loss. The inner wall of the guide tube 15 is smooth to reduce airflow friction noise.

[0041] When the first speaker 10 is operating, the diaphragm 12 generates forward and backward sound waves. The forward sound waves can be conducted to the passenger compartment 201 inside the vehicle to play audio into the vehicle, while the backward sound waves can be conducted through the rear acoustic cavity 13 and the guide port to the external speaker 204 to play audio outside the vehicle. In this way, the first speaker 10 can not only support audio playback inside the vehicle but also support audio playback outside the vehicle. This eliminates the need to add multiple additional speakers or other hardware specifically for external playback to the vehicle, reducing the space occupied inside the vehicle and lowering vehicle development costs.

[0042] Furthermore, by utilizing the design of connecting the rear acoustic cavity 13 to the outside of the vehicle through the guide hole 14, the forward sound wave can be conducted to the inside of the vehicle while the rear sound wave is conducted to the outside of the vehicle, reducing the cancellation caused by the opposite phase between the forward and rear sound waves and avoiding the occurrence of acoustic short circuit.

[0043] In some embodiments, the vehicle audio system 100 further includes a second speaker 20, which is mounted on the vehicle body 200. The first speaker 10 and the second speaker 20 are used to play audio in different frequency bands, and the frequency band corresponding to the first speaker 10 is lower than the frequency band corresponding to the second speaker 20.

[0044] In this way, the first speaker 10 can play audio with a relatively low frequency band, and the second speaker 20 can play audio with a relatively high frequency band. This enables the first speaker 10 and the second speaker 20 to work together to achieve frequency band complementarity, improve the overall performance of the audio system, and achieve the effects of dynamic expansion and sound field optimization.

[0045] In some embodiments, the vehicle audio system 100 further includes a host unit 30, to which the first speaker 10 and the second speaker 20 are electrically connected. The host unit 30 is installed within the vehicle body 200 and can be a digital signal processor, a passive crossover, etc. In this application, the host unit 30 is a digital signal processor. The host unit 30 processes the audio to be played and sends it to the first speaker 10 and the second speaker 20 to drive them to emit sound.

[0046] Specifically, the host 30 is used to divide the audio source signal into frequencies to obtain a first audio signal and a second audio signal corresponding to different frequency bands. The first speaker 10 is used to emit sound in response to the first audio signal, and the second speaker 20 is used to emit sound in response to the second audio signal. For example, the frequency of the first audio signal is less than or equal to 150 Hz, and the frequency of the second audio signal is greater than or equal to 150 Hz.

[0047] In some embodiments, the first speaker 10 includes one or more combinations of a low-frequency speaker and an ultra-low-frequency speaker. For example, the first speaker 10 is an ultra-low-frequency speaker.

[0048] It is understandable that low-frequency signals have the characteristics of long wavelength, strong diffraction ability and weak directionality, which makes them more prone to efficiency reduction due to acoustic short circuits compared to high-frequency signals. The first speaker 10 in this application adopts a design with a guide hole 14 to connect to the outside of the vehicle, which can eliminate the phenomenon of acoustic short circuits, ensure the clarity and transient response of low-frequency signals, significantly improve the audio effect of the first speaker 10, and effectively radiate low-frequency signals to the outside of the vehicle.

[0049] In some embodiments, the first speaker 10 is mounted on the rear side of the vehicle, and the external speaker 204 is located below the first speaker 10 and is formed in the wheel arch cover 205. The guide tube 15 is integrally disposed on the rear side of the vehicle, one end of the guide tube 15 is connected to the guide hole 14 of the first speaker 10 located on the rear side of the vehicle, and the other end of the guide tube 15 is connected to the external speaker 204 located in the wheel arch cover 205 and fixed to the wheel arch cover 205.

[0050] For example, the number of first speakers 10 is 1, and the first speaker 10 is installed in the trunk 203. The trunk 203 has sufficient space at the factory for the installation of various speakers. By installing the first speaker 10 in the trunk 203, it is easier to assemble the first speaker 10 and reduce the degree of modification to the structure of the vehicle body 200 itself, which is beneficial to production.

[0051] It is worth noting that in the example of this application, the number of first speakers 10 is 1, and the first speaker 10 is located in the trunk 203. In other embodiments, multiple first speakers 10 may also be configured. Multiple first speakers 10 may be located in different or the same positions within the vehicle body 200. Possible locations include doors, under seats, etc. The position of the external speaker 204 may be adjusted according to the position of the first speaker 10. The structure of the guide tube 15 may be adjusted according to the relative position of the first speaker 10 and the external speaker 204. This application does not impose any restrictions on this.

[0052] For example, there is one external vent 204, which is located on the wheel arch cover 205. By placing the external vent 204 on the wheel arch cover 205, on the one hand, the external vent 204 can be hidden at the bottom of the vehicle body 200, preventing it from compromising the appearance integrity of the vehicle body 200. On the other hand, the wheel arch cover 205 is positioned higher than the top surface of the tire and higher than the vehicle's safe wading line, so that the external vent 204 is positioned above the vehicle's safe wading line, reducing the risk of water entering the external vent 204 during vehicle wading.

[0053] It is worth noting that in the example of this application, the number of external speaker ports 204 is one. In other embodiments, multiple external speaker ports 204 may be configured. The multiple external speaker ports 204 may be opened on different wheel arch covers 205 or on the same wheel arch cover 205. When there are multiple first speakers 10 and multiple external speaker ports 204, and the first speakers 10 and external speaker ports 204 correspond one-to-one, multiple guide tubes 15 may also be configured. The multiple guide tubes 15 are respectively connected between the first speakers 10 and the corresponding external speaker ports 204. That is, the number and position of the guide tubes 15 can be adjusted according to the first speakers 10 and external speaker ports 204. This application does not limit this.

[0054] In some embodiments, a protective grille may be provided at the wheel arch cover 205 to block the external opening 204, so as to protect the external opening 204 and prevent debris from the outside of the vehicle from entering the external opening 204.

[0055] It is worth noting that in the example of this application, the distance between the external speaker 204 and the first speaker 10 is relatively large, and the external speaker 204 and the guide hole 14 are connected through the guide tube 15, which allows for effective sound wave conduction. In other embodiments, if the distance between the external speaker 204 and the first speaker 10 is relatively small, the external speaker 204 and the guide hole 14 can also be directly connected. For example, the external speaker 204 is located on the outside of the vehicle body 200 and the trunk 203, and the first speaker 10 is installed on the inside of the vehicle body 200 and the trunk 203, with the external speaker 204 connected to the guide hole 14. The installation method of the first speaker 10 can be configured according to the space and position within the vehicle body 200, and this application does not impose any restrictions on this.

[0056] In some embodiments, the second speaker 20 includes one or more combinations of a mid-range speaker, a mid-high frequency speaker, and a full-range speaker. The second speaker 20 is disposed on the front side of the vehicle body 200 and located outside the passenger compartment 201. Exemplarily, the second speaker 20 is a full-range speaker or a pedestrian warning sound speaker, and the second speaker 20 is disposed below the engine compartment 202.

[0057] It is understandable that the engine compartment 202 of the vehicle body 200 has sufficient space for the installation of pedestrian warning speakers when it leaves the factory. By placing the second speaker 20 in the engine compartment 202, it is easier to assemble the second speaker 20 and reduce the degree of modification to the structure of the vehicle body 200 itself, which is beneficial to production.

[0058] It is worth noting that in the example of this application, the number of second speakers 20 is 1, and the second speaker 20 is disposed in the cabin 202. In other embodiments, multiple second speakers 20 may also be configured. Multiple second speakers 20 may be disposed in different positions or in the same position. The possible positions include the front grille, the front bumper, etc. This application does not limit this.

[0059] This application also provides a vehicle, which includes a vehicle body 200 and a vehicle audio system 100 as described in the above embodiments. The vehicle body 200 has a passenger compartment 201 inside, and an external speaker 204 is provided on the outside of the vehicle body 200.

[0060] Specifically, the vehicle also includes wheels 206 and a suspension, wherein the suspension is fixed to the bottom of the vehicle body 200, and the wheels 206 are connected to the suspension. A wheel arch cover 205 is also provided at the bottom of the vehicle body 200, corresponding to the wheels 206, and the wheel arch cover 205 is positioned entirely above the corresponding wheels 206. An external speaker 204 is provided in the wheel arch cover 205. A first speaker 10 is installed on the rear side of the vehicle body 200, and the first speaker 10 is provided with a guide tube 15, one end of which communicates with a guide hole 14, and the other end of which communicates with the external speaker 204.

[0061] Specifically, the vehicle audio system 100 includes a first speaker 10, a second speaker 20, and a head unit 30. The first speaker 10 and the second speaker 20 are electrically connected to the head unit 30. The head unit 30 processes the audio to be played to obtain low-frequency and high-frequency signals. The low-frequency signal is sent to the first speaker 10 to drive it to produce sound, and the high-frequency signal is sent to the second speaker 20 to drive it to produce sound. The head unit 30 can communicate with an operating terminal, such as a mobile phone, tablet computer, or car infotainment screen. Users can send control commands to the head unit 30 through the operating terminal to control the switching of the operating mode of the vehicle audio system 100 and to control the playback of specified audio.

[0062] The vehicle audio system 100 provided in this embodiment has two operating modes: in-vehicle mode and out-of-vehicle mode. In in-vehicle mode, the vehicle audio system 100 can play audio into the vehicle, i.e., into the passenger compartment 201. In out-of-vehicle mode, the vehicle audio system 100 can play audio out of the vehicle, i.e., into the passenger compartment 201.

[0063] It is worth noting that, in addition to the vehicle audio system 100 provided in this application embodiment, the vehicle may also be equipped with other speaker devices for audio playback in the vehicle. For example, mid-low frequency speakers may be configured at the door, high frequency speakers may be configured at the A-pillar or door, full-range speakers may be configured at the center console or ceiling, and low frequency speakers may be configured at the headrest or seat. This application does not impose any restrictions on this.

[0064] The vehicle audio system 100 provided in this application can also be linked with other systems configured in the vehicle. For example, the vehicle audio system 100 can be linked with the ambient lighting system. When the vehicle audio system 100 plays audio, the ambient lighting can switch lighting modes according to the attributes of the audio to achieve a sound and light coordination effect. As another example, the vehicle audio system 100 can also be linked with the suspension system. When the vehicle audio system 100 plays audio, the suspension can contract and expand according to the rhythm of the audio, creating a more dynamic effect.

[0065] Thus, the application of the in-vehicle audio system 100 can be extended to a variety of scenarios. The following are examples of several application scenarios.

[0066] In a tranquil outdoor camping setting, users can set the playback mode to "Outdoor Mode" and play white noise mixed with birdsong and flowing water through the car audio system. This, combined with ambient lighting to change the color tone, creates a serene forest atmosphere.

[0067] In a dynamic outdoor camping setting, users can set the playback mode to outdoor mode, which will release powerful bass through the car audio system 100, and create an open-air music atmosphere in conjunction with the up-and-down movement of the suspension.

[0068] In a car driving scenario, the user can set the playback mode to in-car mode and play music into the car through the car audio system 100. At this time, the head unit 30 can attenuate the low-frequency signal during the tuning process to reduce the low-frequency signal radiation outside the car.

[0069] Please refer to the following: Figure 4 This application also provides a control method for a vehicle audio system 100, which can be executed by the host 30.

[0070] The control method includes the following steps.

[0071] S101, Obtain the audio source signal.

[0072] The audio source signal is the audio information to be played. The audio information can come from pre-stored audio files in the system or from audio files downloaded by the user.

[0073] S102. Process the audio source signal to obtain the first audio signal and the second audio signal.

[0074] By dividing the audio source signal according to preset frequency band conditions, a first audio signal and a second audio signal corresponding to different frequency bands can be obtained. The frequency band of the first audio signal corresponds to the first speaker 10, and the frequency band of the second audio signal corresponds to the second speaker 20. For example, the frequency of the first audio signal is less than or equal to 150 Hz, and the frequency of the second audio signal is greater than or equal to 150 Hz.

[0075] S103. Send the first audio signal to the first speaker 10 to drive the first speaker 10 to emit sound.

[0076] S104. Send the second audio signal to the second speaker 20 to drive the second speaker 20 to emit sound.

[0077] The first speaker 10 emits sound in response to the first audio signal, and the second speaker 20 emits sound in response to the second audio signal.

[0078] It is worth noting that steps S103 and S104 can be executed simultaneously or in a preset order, and this application does not impose any restrictions on this.

[0079] Please refer to the following: Figure 5 In some embodiments, the control method further includes the following steps before step S103.

[0080] S201. Determine the current playback mode.

[0081] The playback modes include in-vehicle mode and out-of-vehicle mode. For example, the user can select the corresponding playback mode on the operating terminal and send a control command to the host 30. The host 30 determines the corresponding playback mode in response to the control command from the operating terminal.

[0082] S202. Determine whether the playback mode is in-car mode. If yes, proceed to step S203; otherwise, proceed to step S204.

[0083] S203. Reduce the first audio signal and execute step S103.

[0084] In response to the in-car playback mode, the first audio signal is attenuated to reduce the low-frequency signal response radiated by the first speaker 10, thereby reducing the low-frequency signal radiation to the outside of the vehicle and reducing the leakage of audio sound in the in-car playback scenario.

[0085] S204. Enhance the first audio signal and execute step S103.

[0086] In response to the playback mode being an external vehicle mode, the first audio signal is enhanced to increase the low-frequency signal response radiated by the first speaker 10, thereby increasing the low-frequency signal radiation to the outside of the vehicle in the external playback scenario and improving the external sound output effect.

[0087] In this way, the car audio system 100 can switch between different playback modes according to the actual playback environment to meet the audio playback needs in different scenarios, making it more intelligent, diversified, and improving the user experience.

[0088] This application is not limited to the specific embodiments described above. Those skilled in the art will readily understand that many alternative solutions exist for the test fixture without departing from the principles and scope of this application. The scope of protection of this application is determined by the claims.

Claims

1. A car audio system, characterized by comprising: The in-vehicle audio system is applied to a vehicle, which includes a vehicle body, a passenger compartment inside the vehicle body, and an external speaker outlet on the outside of the vehicle body. The vehicle audio system includes a first speaker, which includes a housing and a diaphragm. The diaphragm is disposed inside the housing, and a rear acoustic cavity is formed behind the diaphragm. The housing has a guide hole that communicates with the rear acoustic cavity. The first speaker is installed inside the vehicle body, with the front of the diaphragm facing the passenger compartment to play audio into the vehicle; the guide hole is connected to the external speaker to play audio outside the vehicle.

2. The car audio system according to claim 1, wherein The first speaker also includes a guide tube connected to the outside of the housing, one end of the guide tube communicating with the guide hole and the other end of the guide tube communicating with the external speaker port.

3. The car audio system of claim 1, wherein The first speaker is mounted on the rear side of the vehicle body.

4. The car audio system according to any one of claims 1 to 3, characterized by, The vehicle audio system also includes a second speaker, which is mounted on the vehicle body, and the frequency band corresponding to the first speaker is lower than the frequency band corresponding to the second speaker.

5. The car audio system of claim 4, wherein The first loudspeaker includes one or more combinations of low-frequency loudspeakers and ultra-low-frequency loudspeakers.

6. The car audio system of claim 4, wherein The second loudspeaker includes one or more combinations of a mid-range loudspeaker, a mid-high frequency loudspeaker, and a full-range loudspeaker.

7. The vehicle audio system according to claim 4, characterized in that, The second speaker is mounted on the front side of the vehicle body and is located outside the passenger compartment.

8. The vehicle audio system according to claim 4, characterized in that, The vehicle audio system also includes a host unit, and the first speaker and the second speaker are both electrically connected to the host unit. The host unit is used to divide the audio source signal into frequencies to obtain a first audio signal and a second audio signal corresponding to different frequency bands. The first speaker is used to emit sound in response to the first audio signal, and the second speaker is used to emit sound in response to the second audio signal.

9. A vehicle, characterized in that, The vehicle includes a vehicle body and a vehicle audio system as described in any one of claims 1 to 8, wherein the vehicle body has a passenger compartment and an external speaker is provided on the outside of the vehicle body; The first speaker is installed inside the vehicle body, with the front of the diaphragm facing the passenger compartment to play audio into the vehicle; the guide hole communicates with the external speaker to play audio outside the vehicle.

10. The vehicle according to claim 9, characterized in that, The bottom of the vehicle body is provided with a wheel arch cover, and the external speaker is opened in the wheel arch cover; the first speaker is installed on the rear side of the vehicle body, and the first speaker is provided with a guide tube, one end of the guide tube is connected to the guide hole, and the other end of the guide tube is connected to the external speaker.

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