KR101851141B1 - Vehicle, control method thereof, and audio apparatus for vehicle - Google Patents

Abstract

The vehicle includes a speaker cover which can be opened or closed, and includes a first speaker module for outputting sound of a first frequency band, a speaker cover which can be opened or closed, and a speaker for outputting sound of a second frequency band 2 speaker module and a sound source into an electrical acoustic signal and outputs the electrical acoustic signal to the first and second speaker modules. According to the volume of the first and second frequency bands of the sound source, And a head unit for controlling the opening ratio.

Description

[0001] VEHICLE, CONTROL METHOD THEREOF, AND AUDIO APPARATUS FOR VEHICLE [0002]

A vehicle, a control method thereof, and a car audio apparatus are disclosed. More particularly, the present invention relates to a vehicle capable of providing sound to a driver and a passenger, a control method thereof, and a car audio apparatus.

Generally, a vehicle means a moving means or a transportation means that travels on a road or a line using fossil fuel, electricity, or the like as a power source.

The vehicle is positioned as a living space that provides rest to the driver beyond mere means of transport or transportation. In addition, a variety of car audio systems are installed in the vehicle to provide comfort and relaxation for the driver.

The general audio system has a speaker for outputting high-pitched sound, a medium-pitched sound and a low-pitched sound according to the frequency of a sound source signal, and a high / mid / low-pitched speaker has a structure for outputting optimum high / mid / .

On the other hand, the automotive audio system has problems in that it can not provide a high / mid / low-frequency speaker due to space limitation and safety problems, or to output an optimum high / mid / There was a limit that did not have structure.

One aspect of the disclosed invention is to provide a vehicle capable of outputting an optimum high-pitched sound, a medium-pitched sound, and a low-pitched sound according to a frequency characteristic of a sound source, a control method thereof, and an audio apparatus for a vehicle.

A vehicle according to one aspect of the disclosed invention includes a speaker cover that can be opened or closed and includes a first speaker module that outputs sound in a first frequency band, a speaker cover that can be opened or closed, A second speaker module for outputting sounds of a first frequency band and a second speaker module for converting a sound source into an electrical acoustic signal and outputting the electrical acoustic signal to the first and second speaker modules, And a head unit for controlling the opening ratio of the speaker cover of the two-speaker module.

As the volume of the first and second frequency bands increases, the opening ratio of the speaker cover of the first and second speaker modules may increase.

Wherein the head unit measures the sound intensities of the first and second frequency bands of the sound source for a predetermined monitoring time and measures the sound intensities of the sound sources determined based on the intensities of the sounds of the first and second frequency bands of the sound source 1 and the second frequency band, the opening ratio of the speaker cover of the first and second speaker modules can be controlled.

Wherein the head unit measures the sound intensities of the first and second frequency bands of the sound source at predetermined sampling times and measures the sound intensities of the sound sources determined based on the intensities of the sounds of the first and second frequency bands of the sound source 1 and the second frequency band, the opening ratio of the speaker cover of the first and second speaker modules can be controlled.

Wherein the head unit measures the sound intensities of the first and second frequency bands of the sound source when the sound source is changed and detects the sound intensity of the sound source determined based on the intensities of the sounds of the first and second frequency bands of the sound source 1 and the second frequency band, the opening ratio of the speaker cover of the first and second speaker modules can be controlled.

If the sound source is sound, the head unit can control the opening ratio of the speaker cover of the first and second speaker modules at a predetermined opening ratio.

The speaker cover may include a cover plate having a plurality of holes formed therein and a diaphragm capable of closing at least a part of the plurality of holes.

Wherein the speaker cover includes a first cover plate having a plurality of first holes formed therein and a second cover plate having a plurality of second holes formed at positions corresponding to the positions of the plurality of first holes, The plurality of first holes and the plurality of second holes may overlap with each other or may be staggered depending on the relative position of the second cover plate.

According to an aspect of the present invention, there is provided a method of controlling a vehicle including first and second speaker modules including a speaker cover that can be opened or closed, the method comprising: acquiring a sound source; Controlling the speaker cover of the first and second speaker modules so that the opening ratio of the speaker cover of the first speaker module is adjusted according to the volume of the first and second frequency bands, converting the sound source into an electrical acoustic signal And outputting the result to the first and second speaker modules.

As the volume of the first and second frequency bands increases, the opening ratio of the speaker cover of the first and second speaker modules may increase.

The process of controlling the speaker covers of the first and second speaker modules may include the steps of measuring sound intensities of the first and second frequency bands of the sound source for a predetermined monitoring time, Determining an open ratio of the speaker cover of the first and second speaker modules according to a volume level of the first and second frequency bands of the sound source based on the sound intensity of the first and second speaker modules, And controlling the speaker cover of the first and second speaker modules according to the opening ratio of the speaker cover of the first speaker module.

The step of measuring the intensities of the first and second frequency bands of the sound source may include measuring the intensities of the first and second frequency bands of the sound source at predetermined sampling times.

The step of measuring the intensities of the first and second frequency bands of the sound source may include measuring the intensities of the first and second frequency bands of the sound source when the sound source is changed.

The control method may further include a step of controlling the opening ratio of the speaker cover of the first and second speaker modules at a predetermined opening ratio when the sound source is sound.

An audio apparatus according to an aspect of the disclosed invention includes a speaker cover which can be opened or closed and includes a first speaker module for outputting sound of a first frequency band and a speaker cover which can be opened or closed, A second speaker module for outputting sound of a frequency band and a sound source to an electrical acoustic signal and outputting the electrical acoustic signal to the first and second speaker modules, And a control unit for generating an open ratio control signal for controlling the open ratio of the speaker cover of the second speaker module.

As the volume of the first and second frequency bands increases, the opening ratio of the speaker cover of the first and second speaker modules may increase.

Wherein the control unit measures the sound intensities of the first and second frequency bands of the sound source for a predetermined monitoring time and measures the first and second frequency bands of the sound source determined based on the sound intensities of the first and second frequency bands of the sound source And the speaker cover of the first and second speaker modules according to the volume level of the second frequency band.

If the sound source is sound, the control unit may control the opening ratio of the speaker cover of the first and second speaker modules at a predetermined opening ratio.

The speaker cover may include a cover plate having a plurality of holes formed therein and a diaphragm capable of closing at least a part of the plurality of holes.

Wherein the speaker cover includes a first cover plate having a plurality of first holes formed therein and a second cover plate having a plurality of second holes formed at positions corresponding to the positions of the plurality of first holes, The plurality of first holes and the plurality of second holes may overlap with each other or may be staggered depending on the relative position of the second cover plate.

 According to an aspect of the disclosed invention, a vehicle, a control method thereof, and an audio apparatus for a vehicle that can output optimum high-pitched sound, medium-pitched sound, and low-pitched sound according to a frequency characteristic of a sound source can be provided.

1 shows a vehicle according to an embodiment.
Fig. 2 shows electrical components of a vehicle according to an embodiment.
3 shows a configuration of an audio apparatus according to an embodiment.
4 shows an interior of a vehicle in which an audio apparatus according to an embodiment is installed.
5 shows a configuration of a head unit included in an audio apparatus according to an embodiment.
6 illustrates a speaker module included in an audio device according to an embodiment.
7 shows an example of a speaker cover included in an audio device according to an embodiment.
8 shows another example of a speaker cover included in an audio apparatus according to an embodiment.
9 shows another example of a speaker cover included in an audio apparatus according to an embodiment.
10 shows an example of the operation of the audio device according to one embodiment.
11 shows a spectrum of an input sound source of an audio apparatus according to an embodiment.
12 shows another example of the operation of the audio apparatus according to one embodiment.

Like reference numerals refer to like elements throughout the specification. This specification does not describe all the elements of the embodiments, and duplicate descriptions of the contents or embodiments in the technical field to which the disclosed invention belongs are omitted. The term 'part, module, member, or block' used in the specification may be embodied in software or hardware, and a plurality of 'part, module, member, and block' may be embodied as one component, It is also possible that a single 'part, module, member, block' includes a plurality of components.

Throughout the specification, when a part is referred to as being "connected" to another part, it includes not only the case directly connected but also the case where the connection is indirectly connected, and the indirect connection includes connection through the wireless communication network do.

Also, when an element is referred to as "comprising ", it means that it can include other elements as well, without departing from the other elements unless specifically stated otherwise.

Throughout the specification, when a member is located on another member, it includes not only when a member is in contact with another member but also when another member exists between the two members.

The terms first, second, etc. are used to distinguish one element from another, and the elements are not limited by the above-mentioned terms.

The singular forms " a " include plural referents unless the context clearly dictates otherwise.

In each step, the identification code is used for convenience of explanation, and the identification code does not describe the order of the steps, and each step may be performed differently from the stated order unless clearly specified in the context. have.

Hereinafter, the working principle and embodiments of the disclosed invention will be described with reference to the accompanying drawings.

1 shows a vehicle according to an embodiment. Figure 2 also shows electrical components of a vehicle according to one embodiment.

As shown in Fig. 1, a vehicle 1 includes a vehicle body 10 that forms an appearance of the vehicle 1 and accommodates various components, and a wheel 20 that moves the vehicle 1. As shown in Fig.

The vehicle body 10 forms an interior space in which the driver can stay, an engine room for accommodating the engine, and a trunk room for accommodating the cargo.

The vehicle body 10 includes a hood 11, a front fender 12, a roof panel 13, a door 14, a trunk lid 15, A quarter panel 16, and the like. A front window 17 is provided in front of the vehicle body 10 and a side window 18 is provided on a side surface of the vehicle body 10 in order to secure a view of the driver, A rear window 19 may be provided at the rear of the vehicle body 10.

A power generation device, a power transmission device, a steering device, a braking device, and the like may be provided inside the vehicle body 10 so that the vehicle 1 can run. The power generation device generates a rotational force and may include an engine, a fuel supply device, a cooling device, an exhaust device, an ignition device, and the like. The power transmitting device transmits the rotational force generated by the power generating device to the wheel 20, and may include a clutch, a shift lever, a transmission, a differential device, a drive shaft, and the like. The steering apparatus controls the running direction of the vehicle 1, and may include a steering wheel, a steering gear, a steering link, and the like. The braking device stops the rotation of the wheel 20 and may include a brake pedal, a master cylinder, a brake disk, a brake pad, and the like.

The wheel 20 receives rotational force from the power generating device through the power transmitting device, and can move the vehicle 1. [ The wheel 20 may include a front wheel 21 provided at the front of the vehicle and a rear wheel 22 provided at the rear of the vehicle.

The vehicle 1 as well as the machinery described above can include various electric components 30 for the control of the vehicle 1, the safety and comfort of the driver and the passenger.

2, the vehicle 1 includes an engine management system (EMS) 31, a transmission control module (TCM) 32, an electronic braking system (EBS) 33, an electric power steering (EPS) 34, an audio / video / navigation (AVN) device 35, a heating / ventilation / air conditioning (HVAC) A body control module (BCM) 37, and an audio device 100.

The engine management system 31 can control the operation of the engine (not shown) and manage the engine according to the driver's acceleration command through the accelerator pedal 31a (see Fig. 4). For example, the engine management system 31 can perform engine torque control, fuel consumption control, engine failure diagnosis, and the like.

The transmission control module 32 can control the operation of the transmission in accordance with the shift command of the driver through the shift lever 32a (see Fig. 4) or the running speed of the vehicle 1. [ For example, the transmission control module 32 can perform shift control, damper clutch control, pressure control at the time of friction clutch on / off, and engine torque control during shifting.

The electronic braking system 33 can control the braking device of the vehicle 1 and maintain the balance of the vehicle 1 in accordance with the braking command of the driver through the braking pedal 33a (see Fig. 4). For example, the electronic braking system 33 may include an anti-lock brake system (ABS) and an electric stability control (ESC).

The electric steering system 34 can assist the driver to easily operate the steering wheel 34a (see Fig. 4) by the driver. For example, the electric power steering apparatus 34 may assist the user in steering operations such as reducing the steering force at low-speed driving or parking, and increasing the steering force at high-speed driving.

The AVN device 35 can output music or an image according to the input of the driver or can display the route to the destination inputted by the driver.

The HVAC device 36 can introduce air outside the vehicle 1 into the interior of the vehicle 1 or circulate air inside the vehicle 1 and can heat or cool the indoor air according to the indoor temperature of the vehicle 1 can do.

The charge control module 37 can control the operation of electrical components that provide convenience to the driver or ensure the safety of the driver. For example, the car control module 37 can control a power seat installed in the vehicle 1, a remote door lock device, a power window, a head lamp, a wiper, a gauge device and a multifunctional switch.

The audio apparatus 100 may reproduce a media file stored in an internal storage medium or an external storage medium (a compact disk (CD), a USB storage medium, or the like) according to a command from the driver, and output sound corresponding to the reproduced media file . The audio device 100 may receive sound data from a user device such as a portable computer, a portable communication device, a portable media player, and the like, and may output sound corresponding to the received sound data. In addition, the audio apparatus 100 may receive a broadcast signal and output a sound corresponding to the received broadcast signal.

The audio device 100 is described in further detail below.

The electrical components 30 can communicate with each other through the vehicle communication network NT. For example, the engine management system 31, the transmission control module 32, the electronic braking system 33, the electric steering 34, the AVN device 35, the HVAC device 36, the car control module 37, And the audio device 100 can exchange data via the vehicle communication network NT.

The vehicle communication network NT has a communication protocol such as Ethernet, MOST (Media Oriented Systems Transport), Flexray, CAN (Controller Area Network), and LIN (Local Interconnect Network) Can be adopted. Further, the vehicular communication network NT can employ not only a single communication protocol such as a modem, flex-ray, can, and lean but also a plurality of communication protocols.

The electric component 30 described above is merely an example of the electric component installed in the vehicle 1. [ The vehicle 1 may be provided with electrical components other than the electrical components 30 described above or may be provided with additional electrical components in addition to the electrical components 30 described above, Some of which may be omitted.

Hereinafter, the specific configuration and operation of the audio apparatus 100 described above will be described.

3 shows a configuration of an audio apparatus according to an embodiment. 4 shows an interior of a vehicle in which an audio apparatus according to an embodiment is installed. 5 shows a configuration of a head unit included in an audio apparatus according to an embodiment.

3, the audio apparatus 100 includes a head unit 200 to which an operator's command is input, a power amplifier 300 for amplifying an electric acoustic signal output from the head unit 200, a power amplifier 300 And a sound output unit 400 for converting the electrical sound signal amplified by the sound output unit 400 into sound.

The head unit 200 may be installed in the center fascia in the center of the dashboard 40 together with the AVN apparatus 35 and the HVAC apparatus 36 as shown in Fig.

5, the head unit 200 includes an input unit 220, a display unit 230, a communication unit 240, a storage unit 250, a sound source acquisition unit 260, a sound signal output unit 270, And a controller 210.

The input unit 220 may include a plurality of input devices 221 for acquiring an operator's command.

The input device 221 includes a playback button for playing a media file or for pausing playback of a media file, a stop button for playing the media file, a volume button (or dial) for controlling the volume of the outputted sound, A selection button for selecting any one of the signals, and the like. The input device 221 includes a hardware device such as various buttons or switches, a pedal, a keyboard, a mouse, a track-ball, various levers, a handle, a stick, Or a GUI (Graphical User interface) such as a touch pad, or software.

The display unit 230 may include a display panel 231 for visually displaying an operation state of the audio device 100 and the like.

The display panel 231 is used to control the power on / off of the audio device 100, the information related to the media file played by the audio device 100, the channel (or frequency) of the selected broadcast signal, The volume of the sound, and the like. The display panel 231 may include a cathode ray tube (CRT), a digital light processing (DLP) panel, a plasma display panel (LCD) panel, a liquid crystal display A light emitting diode (OLED) panel, an electrophoretic display (EPD) panel, an electrochromic display (ECD) panel, a light emitting diode (LED) panel or an organic light emitting diode : OLED) panel, but the present invention is not limited thereto.

The communication unit 240 may include an internal communication module 241 for communicating with other electric components 30 within the vehicle 1 and an external communication module 242 for communicating with an electronic device outside the vehicle 1. [

The internal communication module 241 is connected to the engine management system 31, the transmission control module 32, the electronic braking system 33, the electric steering system 34, and the like via communication protocols such as Ethernet, The AVN device 35, the HVAC device 36, the vehicle body control module 37, and the like. The internal communication module 241 may include a transceiver that transmits a communication signal to the vehicle communication network NT and receives a communication signal from the vehicle communication network NT.

The external communication module 242 includes a wireless communication module for communicating with a portable computer, a portable communication device, a portable media player, and a USB (Universal Serial Bus) communication using a communication protocol such as WiFi, Bluetooth, A wired communication module that communicates with a portable computer, a portable communication device, and a portable media player using a communication protocol of the portable communication device.

The storage unit 250 may include a hard disk drive (HDD) 251, a flash memory 252, and the like, and may include programs and data for controlling the operation of the audio device 100 , A playable media file, and the like.

The sound source acquisition unit 260 may include a broadcast signal receiver 261, a media reader 262, and an input terminal 263.

The broadcast signal receiver 261 receives broadcast signals of a plurality of frequencies and can filter broadcast signals of frequencies selected by the driver. In other words, only the broadcast signal of the frequency or channel selected by the driver can be acquired, and the obtained broadcast signal can be demodulated. The broadcast signal receiver 261 may include an antenna for acquiring a broadcast signal of a plurality of frequencies, a tuner for filtering a broadcast signal of a frequency selected by a driver, and a demodulator for demodulating a broadcast signal.

The media reader 262 may read media files or sound data from a media medium such as a compact disc (CD), a digital versatile disc (dvd), a memory card, or the like.

The audio input terminal 263 can receive electrical sound signals output from a portable computer, a portable communication device, a portable media player, and the like. For example, the audio input terminal 263 may include an AUX terminal, an HDMI terminal, and the like.

As described above, the sound source acquiring unit 260 may acquire sound sources from an antenna, a media medium, or an external electronic device, and the acquired sound sources may take various forms such as a broadcast signal, sound data, or an electrical sound signal.

The acoustic signal output section 270 may include an output amplifier 271 and an output terminal 272.

The output amplifier 271 can amplify the power of the electrical acoustic signal output through the output terminal 272. The output amplifier 271 may comprise a vacuum tube or transistor for amplifying the power of the electrical signal.

The sound output terminal 271 may output an electrical sound signal corresponding to the broadcast signal, the sound data, and the electrical sound signal obtained by the sound source obtaining section 260. The sound output terminal 271 may include a treble output terminal for outputting a high frequency sound signal, a middle output terminal for outputting an intermediate frequency sound signal, and a bass output terminal for outputting a low frequency sound signal. The sound output terminal 271 may be connected to the power amplifier 300 or the sound output unit 400 through the vehicle communication network or may be connected to the power amplifier 300 or the sound output unit 400, And the hard wire.

The control unit 210 includes a memory 212 for storing a program and data for controlling the operation of the head unit 200 and a command for controlling the operation of the head unit 200 in accordance with programs and data stored in the memory 212 And a processor 211 for generating data.

The processor 211 may process a broadcast signal, sound data or an electrical acoustic signal to generate an electrical acoustic signal.

For example, the processor 211 may decode a broadcast signal or sound data to generate an electrical acoustic signal. The processor 211 may analyze the frequency spectrum of the electrical acoustic signal and modify the frequency characteristics of the electrical acoustic signal. The processor 211 may analyze the frequency spectrum of the electrical acoustic signal and generate a high frequency acoustic signal, an intermediate frequency acoustic signal, and a low frequency acoustic signal.

In particular, the processor 211 may generate a control signal for controlling the opening ratio of the speaker modules 401, 402, and 403 included in the sound output unit 400 according to the frequency characteristics of the electrical acoustic signal.

The memory 212 may store programs and data for processing broadcast signals, acoustic data or electrical acoustic signals and for generating electrical acoustic signals.

The memory 212 may include a volatile memory such as a SRAM (Dynamic Random Access Memory) or a D-RAM (Dynamic Random Access Memory), a ROM (Read Only Memory), an EPROM (Erasable Programmable Read Only Memory) And non-volatile memory such as electrically erasable programmable read only memory (EEPROM). The non-volatile memory stores programs and data for controlling the operation of the audio apparatus 100, and the volatile memory can store broadcast signals, sound data, electrical acoustic signals, and the like.

The control unit 210 may process the broadcast signal, the sound data, or the electrical sound signal that is acquired through the sound source acquisition unit 260, received through the communication unit 240, or stored in the storage unit 250. Also, the controller 210 may generate an electrical sound signal corresponding to a broadcast signal, sound data, or an electrical sound signal.

The controller 210 analyzes the frequency spectrum of the generated electrical sound signal and controls the opening ratio of the speaker modules 401, 402, and 403 according to the frequency characteristics of the electrical sound signal.

Control of the opening ratio of the speaker modules 401, 402, and 403 by the control unit 210 will be described in further detail below.

The power amplifier 300 amplifies the power of the electrical acoustic signal output from the head unit 200. The power amplifier 300 may include a vacuum tube or a transistor for amplifying the electric signal power.

The power amplifier 300 converts the high frequency acoustic signal, the intermediate frequency acoustic signal and the low frequency acoustic signal output from the head unit 200 into a high frequency speaker (tweeter) 401, an intermediate frequency speaker 402 and a low frequency And a speaker (woofer) 403, respectively.

In some cases, the power amplifier 300 may be omitted. In other words, the electrical acoustic signal output from the head unit 200 can be directly input to the acoustic output unit 400. [

The sound output unit 400 may include a plurality of speaker modules 401, 402, and 403 that can convert an electric acoustic signal output from the power amplifier 300 or the head unit 200 into sound. Specifically, the sound output unit 400 includes a high frequency speaker module 401 for converting a high frequency electric sound signal into a high frequency sound, an intermediate frequency speaker module 402 for converting an intermediate frequency electric sound signal to an intermediate frequency sound, And a low frequency speaker module 403 for converting the low frequency electric acoustic signal into low frequency sound.

In addition, each of the speaker modules 401, 402, and 403 can be installed at various positions. 4, an intermediate frequency speaker module 402 is installed on the upper surface of the dashboard 40 of the vehicle 1, and a high frequency speaker module (not shown) is connected to both doors 14 of the vehicle 1. [ 401 and a low-frequency speaker module 403 can be installed.

6 illustrates a speaker module included in an audio device according to an embodiment. 7 shows an example of a speaker cover included in an audio device according to an embodiment. 8 shows another example of a speaker cover included in an audio apparatus according to an embodiment. 9 shows another example of the speaker cover included in the audio apparatus according to the embodiment.

6, each of the speaker modules 401, 402, and 403 includes a speaker 410 for outputting sound, a speaker cover 500 for protecting the speaker 410, and an opening ratio of the speaker cover 500 (Not shown).

The speaker 410 converts the electrical acoustic signal into sound, and outputs the converted sound. The speaker 410 includes a coil that generates a magnetic field that varies with a change in supplied current, a permanent magnet that vibrates in cooperation with the magnetic field of the coil, and a diaphragm that vibrates with the permanent magnet in combination with the permanent magnet can do. Due to the fluctuation of the current flowing through the coil, the permanent magnet and the diaphragm vibrate together to produce sound.

The speaker cover 500 is installed on the surface of the speaker 410 on which sound is output, and can protect the speaker 410 from foreign matter or external force.

A plurality of holes 500a are formed in the speaker cover 500 so that sound output from the speaker 410 is emitted to the room of the vehicle 1. [ The opening ratio of the speaker cover 500 can be controlled by the head unit 200. The head unit 200 can control the size of the opened hole 500a of the speaker cover 500 or the number of the opened holes 500a of the speaker cover 500. [

For example, as shown in FIG. 7, the speaker cover 500 may include a cover plate 511 and diaphragms 512 and 513.

The cover plate 511 protects the speaker 410 from foreign substances or external force and a plurality of holes 511a are formed in the cover plate 511 so that sound output from the speaker 410 is emitted to the room of the vehicle 1 .

The diaphragms 512 and 513 may include a plurality of blades 512 for closing a plurality of holes 511a and an annular blade moving member 513 for rotationally moving a plurality of blades 512 depending on positions.

The plurality of blades 512 are located outside the holes 511a so as to open the holes 511a or toward the center of the cover plate 511 so that the holes 511a are closed depending on the position of the blade moving member 513. [ Can be moved.

Specifically, when the blade moving member 513 is located at the first position P1 as shown in Fig. 7A, the plurality of blades 512 can be located outside the hole 511a. As a result, all of the holes 511 of the cover plate 511 can be opened.

When the blade moving member 513 moves from the first position P1 to the second position P2 as shown in FIG. 7 (b), the plurality of blades 512 are fixed to the fixing point 512a formed on one side, As shown in FIG. The other side of the plurality of blades 512 can move toward the center of the cover plate 511 because the plurality of blades 512 rotate about the fixed point 512a.

As a result, a part of the plurality of holes 511a formed in the cover plate 511 can be closed by the plurality of blades 512. In other words, the number of holes 500a of the opened speaker cover 500 is reduced, and the opening ratio of the speaker cover 500 is reduced.

Further, when the blade moving member 513 further moves, the plurality of holes 511a can be completely closed by the plurality of blades 512. [ In other words, all the holes 500a of the speaker cover 500 can be closed.

As described above, the opening ratio of the speaker cover 500 can be changed in accordance with the position of the blade moving member 513.

As another example, as shown in FIG. 8, the speaker cover 500 may include a first cover plate 521 and a second cover plate 522.

A plurality of first holes 521a are formed in the first cover plate 521 so that the sound output from the speaker 410 is emitted to the room of the vehicle 1. The second cover plate 522 is provided with a plurality of second A hole 522a may be formed. The plurality of first holes 521a and the plurality of second holes 522a may be formed at the same position.

The size of the hole 500a of the speaker cover 500 can be changed according to the relative positions of the first cover plate 521 and the second cover plate 522. [

8 (a), when the first cover plate 521 and the second cover plate 522 are all located at the first position P1, the first holes 521a and the second holes 521a, The plurality of second holes 522a overlap each other. As a result, the size of the hole 500a of the speaker cover 500 becomes maximum.

When the first cover plate 521 rotates to the second position Pl as shown in FIG. 8 (b), the plurality of first holes 521a and the plurality of second holes 522a overlap each other Is reduced. In other words, when the relative positions of the first cover plate 521 and the second cover plate 522 are different, the size of the hole 500a of the speaker cover 500 is reduced and the opening ratio of the speaker cover 500 is decreased do. Further, when the first cover plate 521 further rotates, the plurality of first holes 521a and the plurality of second holes 522a may not overlap. In other words, all the holes 500a of the speaker cover 500 can be closed.

As described above, the opening ratio of the speaker cover 500 can be changed according to the relative positions of the first cover plate 521 and the second cover plate 522.

As another example, the speaker cover 500 may include a second cover plate 531 and a second cover plate 532 as shown in FIG.

A plurality of first holes 531a are formed in the first cover plate 531 so that sound output from the speaker 410 is emitted to the room of the vehicle 1. A plurality of second holes 531a are formed in the second cover plate 532, A hole 532a may be formed. The plurality of first holes 531a and the plurality of second holes 532a may be formed at the same position.

The size of the hole 500a of the speaker cover 500 can be changed according to the relative positions of the first cover plate 531 and the second cover plate 532. [

9 (a), when the first cover plate 531 and the second cover plate 532 are all located at the first position P1, a plurality of first holes 531a and The plurality of second holes 532a overlap each other. As a result, the size of the hole 500a of the speaker cover 500 becomes maximum.

When the first cover plate 531 is slid to the second position Pl as shown in Fig. 9 (b), a plurality of first holes 531a and a plurality of second holes 532a overlap each other Is reduced. In other words, when the relative positions of the first cover plate 531 and the second cover plate 532 are different, the size of the hole 500a of the speaker cover 500 is reduced and the opening ratio of the speaker cover 500 is decreased do. Further, when the first cover plate 531 further slides, the plurality of first holes 531a and the plurality of second holes 532a may not overlap. In other words, all the holes 500a of the speaker cover 500 can be closed.

As described above, the opening ratio of the speaker cover 500 can be changed according to the relative positions of the first cover plate 531 and the second cover plate 532.

The driver 420 can change the opening ratio of the speaker cover 500. [ For example, the driver 420 may move the blade moving member 513 or move the first cover plates 521 and 531 according to a control command of the head unit 200. [ The driver 420 may include a motor, a solenoid, or the like that generates mechanical motion force from electrical energy.

As described above, each of the speaker modules 401, 402, and 403 may include a speaker 410 and a speaker cover 500. The opening ratio of the hole 500a formed in the speaker cover 500 may be set such that, (200).

The configuration of the audio apparatus 100 has been described above. Hereinafter, the operation of the audio apparatus 100 will be described.

10 shows an example of the operation of the audio device according to one embodiment. 11 shows a spectrum of an input sound source of an audio apparatus according to an embodiment.

10 and 11, an operation 1000 of the audio apparatus will be described.

The audio device 100 acquires the sound source of the sound to be output (1010).

The head unit 200 of the audio device 100 can acquire sound sources in various paths.

For example, the head unit 200 can acquire a sound source from a broadcast signal. The head unit 200 receives a broadcast signal from a free space through a broadcast signal receiver 261 and can filter a broadcast signal of a frequency selected by a driver among broadcast signals of a plurality of frequencies. Further, the head unit 200 can acquire an electrical sound signal by demodulating the broadcast signal.

As another example, the head unit 200 may acquire a sound source from a media medium. The driver can insert the media medium into the head unit 200. [ The head unit 200 can acquire acoustic data from the media medium through the media reader 262 and obtain an electrical acoustic signal by decoding the acquired acoustic data.

As another example, the head unit 200 may acquire a sound source from the storage unit 250 or an external storage medium. The driver can store the media file in the storage unit 250 of the head unit 200 or the external storage medium. The head unit 200 can acquire acoustic data from a media file and obtain an electrical acoustic signal by decoding the acquired acoustic data.

For example, the head unit 200 can acquire a sound source from an external electronic device through the communication unit 240. [ The driver can connect the head unit 200 and the external electronic device wirelessly or by wire. The head unit 200 can acquire acoustic data from an external electronic device through the communication unit 240 and obtain an electrical acoustic signal by decoding the acquired acoustic data.

As another example, the head unit 200 can acquire a sound source from an external electronic device via an input terminal 263. [ The head unit 200 can acquire an electrical acoustic signal inputted through the input terminal 263. [

The audio device 100 calculates the volume level of the obtained frequency band of the sound source (1020).

The head unit 200 of the audio device 100 can analyze the frequency spectrum of the electrical acoustic signal. For example, by analyzing the frequency spectrum of the acoustic signal, it is possible to acquire the intensity or volume of sound according to the frequency of the acoustic signal as shown in FIG.

The head unit 200 can distinguish the frequency spectrum of the acoustic signal into a low frequency band, an intermediate frequency band, and a high frequency band. For example, as shown in FIG. 11, a frequency from 20 Hz (Hertz) to 200 Hz is set to a low frequency band, a frequency from 200 Hz to 2,000 Hz is set to an intermediate frequency band, Can be set to a high frequency band.

The head unit 200 can determine the intensity of the sound of each frequency band. In other words, the head unit 200 can determine the intensity of the sound in the low-frequency band, the sound in the intermediate frequency band, and the intensity of the sound in the high-frequency band.

The intensity of the sound of the frequency band can be judged by various methods. For example, the head unit 200 can determine the maximum volume in the frequency band as the intensity of the sound in the corresponding frequency band, or determine the average volume in the frequency band as the intensity of the sound in the corresponding frequency band .

The head unit 200 can determine the volume level for each frequency band based on the intensity of the sound for each frequency band. Specifically, the intensity of the sound can be divided into a plurality of levels, and the volume level to which the intensity of the sound belongs can be determined. For example, in the case of FIG. 11, the head unit 200 may be determined to have three levels of a low frequency band, the intermediate frequency band may be determined to be three levels, and the high frequency band may be determined to be four levels.

Also, the head unit 200 can determine the frequency band volume level at various judging points.

For example, the head unit 200 can determine the frequency band volume level at a predetermined sampling time. In other words, the head unit 200 can judge the frequency band volume level in real time.

In another example, the head unit 200 can determine the frequency band volume level for a predetermined monitoring time when the sound source is changed. When acquiring an electrical acoustic signal from the media medium, the head unit 200 can determine the frequency band volume level for a predetermined monitoring time when the track is changed, and when acquiring an electrical acoustic signal from the media file, May determine the frequency band volume level during a predetermined monitoring time when the media file is changed.

In another example, the head unit 200 may determine the frequency band volume level for a predetermined monitoring time if the sound intensity is < 0 > for a predetermined time. If the intensity of the sound is < 0 > for a predetermined time, the head unit 200 can determine that a new sound source has been acquired.

As another example, the head unit 200 can determine the frequency band volume level for a predetermined monitoring time at predetermined time intervals. When acquiring an electrical acoustic signal from a broadcast signal, the head unit 200 can determine the volume level for each frequency band for a predetermined monitoring time at predetermined time intervals.

The audio device 100 adjusts the opening ratio of the speaker modules 401, 402, and 403 (1030).

The head unit 200 of the audio device 100 can adjust the opening ratio of the speaker modules 401, 402, 403 to protect the speaker modules 401, 402, 403 from foreign substances and to provide the driver with a rich sound have. In other words, if the opening ratio of the speaker modules 401, 402, 403 is small, the speaker modules 401, 402, 403 are protected from foreign matter. If the opening ratio of the speaker modules 401, 402, 403 is large, Sound can be provided.

The head unit 200 may generate an open ratio control signal for adjusting the opening ratio of each of the speaker modules 401, 402, and 403 based on the volume level for each frequency band. Specifically, the head unit 200 generates a first open ratio control signal for adjusting the open ratio of the high frequency speaker 401 based on the volume level of the high frequency band, And a third open ratio control signal for adjusting the open ratio of the low frequency speaker 403 based on the volume level of the low frequency band.

As the volume level is increased, the opening ratio of the speaker modules 401, 402, and 403 increases, and as the volume level is lower, the opening ratio of the speaker modules 401, 402, and 403 may decrease. For example, the open ratio of the speaker modules 401, 402, 403 to the 0 level is 0%, the open ratio of the speaker modules 401, 402, 403 to 1 level is 25% The opening ratio of the speaker modules 401, 402, 403 is 50%, the opening ratio of the speaker modules 401, 402, 403 to 3 levels is 75%, and the speaker modules 401, 402, 403 ) May be 100%. In addition, the opening ratio of the speaker modules 401, 402, 403 according to the volume level can be set by the driver.

Each of the speaker modules 401, 402, and 403 can adjust the opening ratio of the speaker cover 500 according to the opening ratio control signal. Specifically, the high frequency speaker module 401 adjusts the opening ratio of the speaker cover 500 according to the first opening ratio control signal, and the intermediate frequency speaker module 402 adjusts the opening ratio of the speaker cover 500 ) Can be adjusted. Also, the low frequency speaker module 403 can adjust the opening ratio of the speaker cover 500 according to the third open ratio control signal.

11, the speaker cover 500 of the high-frequency speaker module 401 can be opened 100%, and the speaker cover 500 of the intermediate-frequency speaker module 402 can be opened by 100%, for example, when the frequency spectrum of the sound is as shown in FIG. And 50% of the low frequency speaker module 403 can be opened.

The audio module 100 outputs the sound corresponding to the electric acoustic signal (1040).

The head unit 200 of the audio module 100 can transmit the electrical sound signals obtained from the broadcasting signal, the media medium, the communication unit 240 and the storage unit 250 to the respective speaker modules 401, 402 and 404 have.

The speaker 410 of each speaker module 401, 402, 403 can convert the received electrical sound signal into sound and output it.

As described above, the audio apparatus 100 can adjust the opening ratio of the speaker cover 500 included in the speaker modules 401, 402, and 403 according to the volume level of each frequency band. Thus, the audio apparatus 100 can provide a richer and richer sound to the driver who protects the speaker modules 401, 402, 403 from foreign matter.

12 shows another example of the operation of the audio apparatus according to one embodiment.

12, the operation 1100 of the audio apparatus will be described.

The audio device 100 acquires the sound source of the sound to be output (1110).

The head unit 200 of the audio device 100 can acquire sound sources in various paths. For example, the head unit 200 may acquire a sound source from a broadcast signal, acquire a sound source from the media medium, acquire a sound source from the storage unit 250 or an external storage medium, Or acquire the sound source from the external electronic device via the input terminal 263. [

The audio device 100 calculates the volume level of the obtained frequency band of the sound source (1020).

The head unit 200 of the audio device 100 analyzes the frequency spectrum of the electrical acoustic signal and the head unit 200 can distinguish the frequency spectrum of the acoustic signal into the low frequency band, the intermediate frequency band and the high frequency band. In addition, the head unit 200 may determine the intensity of the sound for each frequency band, and the head unit 200 may determine the sound level for each frequency band based on the intensity of the sound for each frequency band.

In addition, the head unit 200 may determine the frequency band volume level at a predetermined sampling time, or may determine the frequency band volume level during a predetermined monitoring time when the sound source is changed. Also, the head unit 200 can determine the frequency band volume level for a predetermined monitoring time when the intensity of sound is < 0 > for a predetermined time.

The audio apparatus 100 determines whether the sound source is speech or music based on the volume level of each frequency band of the sound source (1130).

The head unit 200 of the audio device 100 can distinguish between voice and music in various ways.

For example, the head unit 200 can distinguish between voice and music based on the frequency band of the sound source. Since the frequency band of music is larger than that of voice, the head unit 200 can distinguish between voice and music based on the frequency band of the sound source.

As another example, the head unit 200 can distinguish between speech and music using a rhythm that varies with time. Since the music is relatively slow and relatively constant in comparison with the change of the voice, the head unit 200 can distinguish the voice from the music based on the change of the rhythm.

In another example, the head unit 200 can distinguish between speech and music based on the frequency change rate of a sound source. Since most of the musical instruments are designed to continuously output a specific frequency sound and the voice gradually changes in frequency due to the articulatory phenomenon, the head unit 200 can distinguish the voice from the music based on the frequency change rate of the sound source.

If the sound source is determined as music (music of 1130), the audio device 100 adjusts the opening ratio of the speaker modules 401, 402, and 403 according to the volume level of each frequency band (1140).

The head unit 200 of the audio apparatus 100 may generate an open ratio control signal for adjusting the open ratio of each of the speaker modules 401, 402, and 403 based on the volume level for each frequency band. The head unit 200 controls the first, second and third open ratio control signals for adjusting the open ratio of the high frequency speaker 401, the open ratio of the intermediate frequency speaker 402 and the open ratio of the low frequency speaker 403 Can be generated. As the volume level is increased, the opening ratio of the speaker modules 401, 402, and 403 increases, and as the volume level is lower, the opening ratio of the speaker modules 401, 402, and 403 may decrease.

Each of the speaker modules 401, 402, and 403 can adjust the opening ratio of the speaker cover 500 according to the opening ratio control signal. The high frequency speaker module 401 adjusts the opening ratio of the speaker cover 500 according to the first opening ratio control signal and the intermediate frequency speaker module 402 adjusts the opening ratio of the speaker cover 500 according to the second opening ratio control signal, The ratio can be adjusted. Also, the low frequency speaker module 403 can adjust the opening ratio of the speaker cover 500 according to the third open ratio control signal.

If the sound source is judged to be sound (sound of 1140), the audio apparatus 100 adjusts the opening ratio of the speaker modules 401, 402, and 403 according to a predetermined opening ratio (1150).

Voice has a primary purpose in providing information to the driver rather than providing a rich sound. The head unit 200 of the audio apparatus 100 can detect the speaker modules 401, 402, and 403 in accordance with a predetermined opening ratio to sufficiently transmit information to the driver and protect the speaker modules 401, 402, ) Can be adjusted.

For example, the head unit 200 can set the opening ratio of the speaker modules 401, 402, and 403 to the minimum opening ratio at which the speaker cover 500 is opened. According to the example described above, the head unit 200 can open the speaker cover 500 of the speaker modules 401, 402, and 403 by 25%.

The audio module 100 outputs the sound corresponding to the electric acoustic signal (1160).

The head unit 200 of the audio module 100 can transmit the electrical sound signals obtained from the broadcasting signal, the media medium, the communication unit 240 and the storage unit 250 to the respective speaker modules 401, 402 and 404 have.

The speaker 410 of each speaker module 401, 402, 403 can convert the received electrical sound signal into sound and output it.

As described above, the audio apparatus 100 can adjust the opening ratio of the speaker cover 500 included in the speaker modules 401, 402, and 403 depending on whether the sound source is sound or music. Thus, the audio apparatus 100 can provide a richer and richer sound to the driver who protects the speaker modules 401, 402, 403 from foreign matter.

Meanwhile, the disclosed embodiments may be embodied in the form of a recording medium storing instructions executable by a computer. The instructions may be stored in the form of program code and, when executed by a processor, may generate a program module to perform the operations of the disclosed embodiments. The recording medium may be embodied as a computer-readable recording medium.

The computer-readable recording medium includes all kinds of recording media in which instructions that can be decoded by a computer are stored. For example, it may be a ROM (Read Only Memory), a RAM (Random Access Memory), a magnetic tape, a magnetic disk, a flash memory, an optical data storage device, or the like.

The embodiments disclosed with reference to the accompanying drawings have been described above. It will be understood by those skilled in the art that the disclosed embodiments may be practiced in other forms than the disclosed embodiments without departing from the spirit or essential characteristics of the disclosed embodiments. The disclosed embodiments are illustrative and should not be construed as limiting.

1: vehicle 100: audio device
200: head unit 300: power amplifier
400: Acoustic output unit 401: High frequency speaker module
402: Intermediate frequency speaker module 403: Low frequency speaker module

Claims (20)

A first speaker module including a speaker cover which can be opened or closed, and outputs a sound of a first frequency band;
A second speaker module including a speaker cover which can be opened or closed, and outputs a sound of a second frequency band; And
And controls the opening ratio of the speaker cover of the first and second speaker modules according to the volume of the first and second frequency bands of the sound source The head unit comprising:
Wherein the speaker cover includes a cover plate having a plurality of holes formed therein and a diaphragm capable of closing at least a part of the plurality of holes,
Wherein the head unit measures the sound intensities of the first and second frequency bands of the sound source for a predetermined monitoring time and measures the sound intensities of the sound sources determined based on the intensities of the sounds of the first and second frequency bands of the sound source 1 and the loudspeaker level of the second frequency band. The method according to claim 1,
Wherein as the volume of the first and second frequency bands increases, the opening ratio of the speaker cover of the first and second speaker modules increases. delete The method according to claim 1,
Wherein the head unit measures the sound intensities of the first and second frequency bands of the sound source at predetermined sampling times and measures the sound intensities of the sound sources determined based on the intensities of the sounds of the first and second frequency bands of the sound source 1 and the loudspeaker level of the second frequency band. The method according to claim 1,
Wherein the head unit measures the sound intensities of the first and second frequency bands of the sound source when the sound source is changed and detects the sound intensity of the sound source determined based on the intensities of the sounds of the first and second frequency bands of the sound source 1 and the loudspeaker level of the second frequency band. The method according to claim 1,
Wherein the head unit controls the opening ratio of the speaker cover of the first and second speaker modules at a predetermined opening ratio if the sound source is voice. delete delete A method of controlling a vehicle including first and second speaker modules including a speaker cover that can be opened or closed,
A process of acquiring a sound source;
Controlling a speaker cover of each of the first and second speaker modules so that an opening ratio of the speaker cover of the first speaker module is adjusted according to the volume of the first and second frequency bands of the sound source;
Converting the sound source into an electrical acoustic signal and outputting the electrical acoustic signal to the first and second speaker modules,
Wherein the speaker cover includes a cover plate having a plurality of holes formed therein and a diaphragm capable of closing at least a part of the plurality of holes,
The process of controlling the speaker covers of the first and second speaker modules, respectively,
Measuring a sound intensity of the first and second frequency bands of the sound source for a predetermined monitoring time;
Determining an opening ratio of the speaker cover of the first and second speaker modules according to the volume levels of the first and second frequency bands of the sound source based on the sound intensities of the first and second frequency bands of the sound source ; And
And controlling the speaker cover of the first and second speaker modules according to an opening ratio of the speaker cover of the first and second speaker modules. 10. The method of claim 9,
Wherein the opening ratio of the speaker cover of the first and second speaker modules increases when the volume of the first and second frequency bands increases. delete 10. The method of claim 9,
Wherein the step of measuring the intensity of sound in the first and second frequency bands of the sound source comprises the step of measuring the intensity of sounds in the first and second frequency bands of the sound source at predetermined sampling times . 10. The method of claim 9,
Wherein the step of measuring the intensity of sound in the first and second frequency bands of the sound source comprises the step of measuring the intensity of sounds in the first and second frequency bands of the sound source when the sound source is changed, . 10. The method of claim 9,
And controlling the opening ratio of the speaker cover of the first and second speaker modules at a predetermined opening ratio if the sound source is voice. A first speaker module including a speaker cover which can be opened or closed, and outputs a sound of a first frequency band;
A second speaker module including a speaker cover which can be opened or closed, and outputs a sound of a second frequency band; And
And controls the opening ratio of the speaker cover of the first and second speaker modules according to the volume of the first and second frequency bands of the sound source And a control unit for generating an open ratio control signal,
Wherein the speaker cover includes a cover plate having a plurality of holes formed therein and a diaphragm capable of closing at least a part of the plurality of holes,
Wherein the control unit measures the sound intensities of the first and second frequency bands of the sound source for a predetermined monitoring time and measures the first and second frequency bands of the sound source determined based on the sound intensities of the first and second frequency bands of the sound source And controls the opening ratio of the speaker cover of the first and second speaker modules according to the volume level of the second frequency band. 16. The method of claim 15,
Wherein an open ratio of the speaker cover of the first and second speaker modules increases as the volume of the first and second frequency bands increases. delete 16. The method of claim 15,
Wherein the control unit controls the opening ratio of the speaker cover of the first and second speaker modules at a predetermined opening ratio when the sound source is sound. delete delete

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