JPH04324796A - On-vehicle acoustic equipment - Google Patents

Abstract

PURPOSE:To supply an audio signal obtained at an output of each on--vehicle AV equipment selectively to an on-vehicle speaker and/or an on-vehicle headphone by having only to add small number of components. CONSTITUTION:The equipment consists of plural AV equipments 1, 4-7 mounted in an automobile and an on-vehicle speaker 3 connected selectively to one of the AV equipments 1, 4-7. An infrared ray utilizing on-vehicle headphone device comprising an infrared ray wireless transmitter 10 connecting selectively and switchingly to one of the AV equipments 1, 4-7 and an infrared ray headphone 11 receiving transmission information from the transmitter 10 is arranged in the automobile.

Description

[Detailed description of the invention]

0001

[Industrial Field of Application] The present invention relates to in-vehicle audio equipment, and in particular to audio signals from a plurality of audio-visual equipment (hereinafter referred to as AV equipment) installed in a car. The present invention relates to an in-vehicle audio device arranged to selectively supply an audio signal to an in-vehicle speaker and also to supply an audio signal from the selected or unselected AV device to an infrared infrared in-vehicle headphone device.

0002

[Prior Art] Recently, various types of in-vehicle AV equipment have been installed in automobiles and emit music, voices, etc. through the in-vehicle speakers, in response to the diversifying needs of users. AV equipment is being adopted, for example,
Radio cassette players that have been installed in cars for a long time
In addition, there are compact discs (hereinafter referred to as CD) equipped with a player or changer, those equipped with a television, those equipped with a video deck, and digital audio tapes (hereinafter referred to as this). is equipped with a player or changer (called DAT),
Alternatively, a plurality of these AV devices are installed.

[0003] Most of these AV devices have built-in speakers, or speakers installed in the front tray, door, rear tray, etc. of the automobile. Music, voices, etc. are emitted by the system.

[0004] In this case, there are many cases in which a plurality of people ride in a car, and when one of the above-mentioned in-vehicle AV devices is activated when a plurality of people are in the car, the sound is emitted from the above-mentioned speaker. The same audio content will be transmitted to all passengers.

[0005] However, since each passenger usually has different audiovisual preferences, it is natural that some people want to listen to music from the in-vehicle AV device that is in operation, and others who want to listen to music from the in-vehicle AV device that is in operation. There are people who want to listen to audio output other than music using AV equipment, people who want to hear audio output from an inactive car-mounted AV equipment, and people who don't want to hear anything at all. If music is played from the above-mentioned speakers in response to the request of a person who wants to listen to music on a device, this has the disadvantage that it may be a nuisance to other passengers.

[0006] Particularly when driving long distances or long hours by car, the driver (driver) may refrain from emitting sounds from the in-vehicle AV equipment that do not suit his/her tastes in order to drive safely and prevent fatigue. On the other hand, the passenger does not want to hear it, but the passenger is bored, so there are conflicting demands to enjoy the sound emitted from the vehicle-mounted AV equipment, and it is often difficult to adjust these demands.

[0007] Conventionally, in order to eliminate such harmful effects, headphones are provided in the car exclusively for the passenger, and the passenger can use the headphones to listen to sounds that are different from the sound being emitted from the speakers inside the car. Some cars are equipped with individual listening means for in-vehicle audio equipment that can be enjoyed.

[0008]

[Problem to be Solved by the Invention] The above-mentioned individual listening means is such that, for example, a headphone jack is provided in the rear seat, and by inserting a headphone plug into the headphone jack, listen to the sound emitted from your favorite in-vehicle AV equipment through the headphones. It has been made possible to do so.

However, this individual listening means requires a dedicated signal transmission cable to be installed between each in-vehicle AV device and the headphone jack. If a variety of cables are newly laid out in a narrow car interior, they may get in the way of getting in and out of the car or various operations inside the car, which poses the problem of being impractical.

[0010] The present invention was devised in order to solve these problems, and one of its purposes is to improve the performance of each in-vehicle A mounted on an automobile by adding only a few parts.
An object of the present invention is to provide a vehicle-mounted audio device that can selectively supply an audio signal obtained from the output of a V-device to a vehicle-mounted speaker and/or vehicle-mounted headphones.

[0011] Another object of the present invention is to make slight improvements to the original audio equipment (hereinafter referred to as the genuine audio equipment) itself, which has been installed in the automobile, without making any improvements. Just by adding parts, you can obtain audio output from each in-vehicle AV device installed in a car.
An object of the present invention is to provide an in-vehicle audio device that can selectively supply audio signals to an in-vehicle speaker and/or in-vehicle headphones exclusively for a passenger.

0012

[Means for Solving the Problems] In order to achieve the above-mentioned one object, the present invention provides a plurality of AV devices installed in an automobile, and an in-vehicle device that is selectively connected to one of the AV devices. an infrared wireless transmitter that is selectively connected to one of the AV devices; and an infrared headphone that receives transmitted information from the transmitter. The present invention includes first means for arranging a vehicle-mounted headphone device to be used in the vehicle.

[0013] Furthermore, in order to achieve the other objects mentioned above, the present invention provides a system comprising a genuine audio device installed in a car and having an RF input terminal, and an in-vehicle speaker connected to the output thereof. In in-vehicle audio equipment, multiple in-vehicle AV
equipment, a switching circuit for selecting one of the outputs of the AV equipment, and means for selectively coupling one output of the switching circuit to an RF input terminal of the genuine audio device via an RF modulator. , an infrared wireless infrared transmitter selectively connected to the other output of the switching circuit, and an infrared headphone device configured to receive transmitted information from the transmitter. A second means is provided.

[0014]

[Operation] If the first means is adopted, the output audio signals from the plurality of AV devices installed in the car are selectively supplied to the car speakers via the first changeover switch. Then, sound can be emitted from the speaker as in the conventional case. Furthermore, at the same time, the output audio signals from the plurality of AV devices are selectively supplied to an infrared wireless transmitter via a second changeover switch, and are wirelessly transmitted to the interior of the vehicle by the transmitter. If the driver receives this transmitted signal using infrared headphones, the passenger can listen to the same or different sound from the speaker without disturbing the driver or other passengers. can.

[0015] Furthermore, if the second means is adopted, the received signal supplied to the RF input terminal of the genuine audio device installed in the automobile is regenerated by the genuine audio device. - The output audio signal of the audio device is supplied to an on-vehicle speaker, and the sound can be emitted from the speaker in the same manner as in the conventional system. At the same time, one of the output audio signals from the plurality of AV devices installed in the car is selectively taken out via the switching circuit, and one of the taken out output audio signals is RF modulated. After being RF-modulated, it is selectively supplied to the RF input terminal of the genuine audio device, where it is subjected to the same signal processing as the received signal, and the output signal of the genuine audio device is - The audio signal can be supplied to an on-vehicle speaker and emitted from the speaker in the same way as the received signal. On the other hand, the other extracted output audio signal is selectively supplied to an infrared wireless transmitter and wirelessly transmitted by the transmitter into the vehicle, so that the passenger can listen to this transmitted signal with infrared headphones. If the passenger receives the above-mentioned speaker,
Regardless of the voice being emitted from the driver, the voice reproduced through the headphones can be heard without bothering the driver or other passengers.

[0016]

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing a first embodiment of a vehicle-mounted sound reproducing apparatus according to the present invention.

In the figure, 1 is a device having an RF signal receiving function, such as a radio cassette player, and 2 is an audio device.
3 is a car speaker, 4 is a CD player or changer, 5 is a video deck, 6 is a television, 7 is a DAT player or changer, 8
is the first changeover switch, 9 is the second changeover switch, 10
11 is an infrared wireless transmitter having an infrared light emitting element 10A, and 11 is an infrared headphone. The infrared wireless transmitter 10 and the infrared headphones 11 constitute an infrared headphone device for use in a car. Further, each of these components 1 to 11 is appropriately arranged within the automobile.

[0019]The first and second changeover switches 8,
9 are both configured with 1 circuit and 6 contacts, and the 5 contacts b to f except for one contact a are connected to each AV device 1, 4.
7, the output of the first changeover switch 8 is coupled to the in-vehicle speaker 3 via the audio amplifier 2, and the output of the second changeover switch 9 is connected to the infrared wireless transmitter. 10.

The present embodiment operates as described below.

First, the case where the first changeover switch 8 is connected to contact b and the second changeover switch 9 is connected to contact c will be explained. The first audio signal that is the output is supplied to the audio amplifier 2 via the first changeover switch 8 connected to contact b, where it is amplified to an appropriate level and then sent to the in-vehicle speaker. - supplied to Ka3;
The sound is emitted from the speaker 3 into the car. On the other hand, the second audio signal output from the CD player or changer 4 is supplied to the infrared wireless transmitter 10 via the second changeover switch 9 connected to contact c. In the infrared wireless transmitter 10, the infrared rays are modulated by the second audio signal, and the modulated infrared rays are radiated and transmitted from the infrared light emitting element 10A to the interior space of the vehicle. If you receive it with the infrared headphones 11 you are using,
The second audio signal reproduced by the headphones 11 can be emitted.

Next, the first changeover switch 8 is connected to another contact point,
For example, if the second selector switch 9 is similarly connected to another contact, for example, contact e, then the output from the speaker 3 will be the same as the one output from the video deck 5. The headphone 11 outputs the output obtained from the television 6 as a second audio signal. When the first changeover switch 8 and the second changeover switch 9 are further connected to another contact point, the same applies as described above. In particular, the first changeover switch 8 or the second changeover switch 9 When the switch is connected to the contact a, the sound output from the speaker 3 or the headphone 11 stops.

According to this embodiment, the first changeover switch 8
By switching and connecting contacts a to f of
The outputs of the V devices 1, 4 to 7 can be selected as appropriate in the same way as in conventional devices of this type, and the contacts a to f of the second changeover switch 9 can be switched and connected. Accordingly, the audio that you want to emit from the headphones 11 is
Similarly, the audio signal source can be appropriately selected regardless of the selection of the output signal source of the aforementioned AV devices 1, 4 to 7.

[0024] Therefore, the user of the headphones 11 can enjoy sound content different from the sound content emitted from the in-vehicle speaker 3 by himself/herself without causing any inconvenience to the driver or other passengers. In addition, since the headphones 11 are of a wireless type, they can be used in any seat in the car (however, they cannot be used while the driver is driving). (This is not a good thing because it makes it difficult to hear sounds from outside the vehicle.)
Moreover, even if the place of use is moved, there is no need to change the wiring or change the plug connection.

Here, the infrared headphones 11 used in the present invention are already known, as mentioned above, and the normal ones have a built-in battery and are automatic.
When receiving infrared rays that have been frequency modulated (FM) by an audio signal, the FM infrared rays can be frequency demodulated and the audio signal can be emitted.

[0026]This embodiment uses a CD as an AV device.
Player or changer 4, video deck 5, television 6, DAT player or changer 7
Of course, the AV equipment is not limited to these, and other AV equipment can be arbitrarily selected.

FIG. 2 is a block diagram showing a second embodiment of the in-vehicle audio equipment according to the present invention, and FIG. 3 is a specific circuit diagram of the main parts of the second embodiment.

In these figures, 12 is a genuine audio device, 13 is a switching circuit block, 14 is an RF modulator,
15 is a power supply, and other components that are the same as those in the first embodiment are given the same reference numerals.

In the genuine audio device 12, the antenna connection terminal 12A is connected to the output terminal 14B of the RF modulator 14, and the output terminal 12B is connected to the vehicle speaker 3. The RF modulator 14 has an input terminal 14A connected to a receiving antenna, and a modulation terminal 14C connected to the CD changer 4 via the switching circuit block 13. Further, the switching circuit block 13 includes a first switching switch 13A and a second switching switch 1, each of which has two circuits and two contacts.
3B, and the first changeover switch 13A connects the output of the CD changer 4 to the infrared wireless transmitter 10 and the RF
selectively coupled to the modulation terminal 14C of the modulator 14;
The selector switch 13B functions to selectively couple the output of the modulated power supply 15 to the control terminal 14D of the RF modulator 14.

This second embodiment operates as described below.

Here too, first, the switching circuit block 13
To explain the case where the interlocking first changeover switch 13A and second changeover switch 13B are switched to the contact a side, the first audio signal obtained at the output of the CD changer 4 is RF modulator 14 via first changeover switch 13A switched to side a.
However, at this time, the output of the power supply 15 is supplied to the RF modulator 14 via the second changeover switch 13B, which is switched to the contact a side, and the RF modulator 14 is Since the operating state is entered, the first audio signal supplied to the modulation terminal 14C is R.
RF modulation is performed in the F modulator 14. Then, this R
The F modulation signal is supplied from the output terminal 14B to the antenna connection terminal 12A of the genuine audio device 12.
Since the audio device 12 processes this RF modulated signal in the same manner as the received signal received by the receiving antenna, the first audio signal is sent to the output terminal 12B of the genuine audio device 12. The first audio signal sent out is supplied to the vehicle-mounted speaker 3, so that the first audio signal is
A first audio signal is emitted from the car 3 into the car.

In this case, since no signal is supplied to the infrared wireless transmitter 10, no sound is emitted from the infrared headphones 11.

Next, the interlocking first changeover switch 13
When A and the second selector switch 13B are switched and connected to the contact b side, the first audio signal obtained at the output of the CD changer 4 is transferred to the first audio signal that is switched and connected to the contact b side. 1 to the infrared wireless transmitter 10, where the infrared light is frequency modulated (FM). Next, this frequency-modulated infrared ray is radiated and transmitted from the infrared light emitting element 10A to the interior space of the vehicle, so that when the frequency-modulated infrared ray is received by the infrared headphones 11, the passenger can hear the first audio signal. can be heard through the headphones 11.

Also, at this time, due to the open connection of the second changeover switch 13B, the output of the modulated power supply 15 is set to RF.
Since the signal is no longer supplied to the modulator 14, the received signal received by the receiving antenna is supplied to the antenna connection terminal 12A of the genuine audio device 12 via the RF modulator 14, so that the genuine audio device 12 output terminals 12B
A second audio signal obtained from the received signal is generated, which is supplied to the vehicle-mounted speaker 3, and is emitted from the speaker 3 into the vehicle.

[0035] In this embodiment, an example in which the CD changer 4 is used as other AV equipment has been described, but other AV equipment such as a CD player, a video deck, a television, etc. A DAT player, a DAT player, or a changer may be used, or an AV device other than these may be selected.

According to this embodiment, by switching the interlocking first changeover switch 13A and second changeover switch 13B, in one of the switching positions, the in-vehicle speaker 3 is switched to another AV device, For example, only the first audio signal obtained from the output of the CD changer 4 is emitted, and in the other switching position, the signal is obtained from the genuine audio device 12 from the car speaker 3. At the same time, the first audio signal obtained from the infrared headphones 11 is emitted from the output of the CD changer 4. . That is, in this embodiment, the audio signal source to be emitted from the in-vehicle speaker 3 can be appropriately selected at one of the switching positions of both the changeover switches 13A and 13B, and the audio signal source to be emitted from the vehicle-mounted speaker 3 can be selected as appropriate. The audio signal source desired to be output from the headphones 11 can be appropriately selected regardless of the output from the vehicle-mounted speaker 3.

Further, in this embodiment, the genuine audio device 1
2 itself has not undergone any configuration changes, and furthermore,
What is newly required is the switching circuit block 13 and RF
Components such as the modulator 14 and a small amount of connecting material between them are sufficient.

As described above, in this embodiment, similarly to the first embodiment, the user of the infrared headphones 11 can listen to the voice output different from the voice output from the vehicle-mounted speaker 3 to the driver or the like. The headphones 11 can be enjoyed by the user alone without causing any inconvenience to other passengers, and the headphones 11 include:
Since it is a wireless type, it can be used in any seat in the car, and even if you move the seat, there is no need to change the wiring or plug connections. This effect is achieved.

[0039] In addition to this, this embodiment has the additional effect that there is no need to make any configuration changes to the genuine audio device 12 itself even when the above-described configuration is adopted. be.

FIG. 4 is a block diagram showing a third embodiment of the in-vehicle audio equipment according to the present invention.

In the figure, 16 is a first switching circuit;
7 is a second switching circuit, 18 is a third switching circuit, 19
is a signal attenuation circuit, and other components that are the same as those in the first and second embodiments are given the same reference numerals.

The first switching circuit 16 has one circuit and four contacts, and each contact a to d is connected to a CD player.
It is connected to the output of the player or changer 4, video deck 5, television 6, DAT player or changer 7, and its output is connected to the second switching circuit 17. The second switching circuit 17 is of a two-circuit, two-contact type, and consists of a first changeover switch 17A and a second changeover switch 17B that are interlocked.
A selectively couples the output of the first switching circuit 16 to the RF modulator 14 and the infrared wireless transmitter 10;
The changeover switch 17B is for the receiving antenna and the RF modulator 1.
4 output terminal 14B selectively connects to the genuine audio device 12.
It functions to connect to the antenna connection terminal 12A of the antenna. The third switching circuit 18 is of a two-circuit, two-contact type, and consists of a first changeover switch 18A and a second changeover switch 18B that are interlocked, and the first changeover switch 18A is the output of the genuine audio device 12. The terminal 12B is selectively coupled to the vehicle speaker 3 and the signal attenuation circuit 19, and the second changeover switch 18B selects the output of the signal attenuation circuit 19 and the output of the first changeover switch 17A. It functions to couple to the infrared wireless transmitter 10.

This third embodiment operates as described below.

Here too, first, the first switching circuit 16
is connected to an arbitrary contact, for example, contact a, and the first changeover switch 17A of the second changeover circuit 17 is interlocked with the first changeover switch 17A.
and the second changeover switch 17B are connected to the contact a side, and the first changeover switch 18A and the second changeover switch 18B which are linked together in the third changeover circuit 18 are connected to the contact a side. Let me explain the case.

The received signal received by the receiving antenna is transferred to the second changeover switch 17 connected to the contact a side.
Antenna connection terminal 1 of the genuine audio device 12 via B
2A, the genuine audio device 12 performs necessary signal processing on the received signal, and outputs a first audio signal corresponding to the received signal from its output terminal 12B. Next, this first audio signal is supplied to the vehicle-mounted speaker 3 via the first changeover switch 18A connected to the contact a side, and is thereby emitted into the vehicle.

On the other hand, a CD player or changer
The second audio signal obtained at the output of 4 is connected to a first switching circuit 16 connected to the contact a side, a first changeover switch 17A connected to the contact a side, and a first switching circuit 17A connected to the contact a side. The infrared wireless transmitter 10 is connected to the infrared wireless transmitter 10 via a second changeover switch 18B that is connected to the side.
The infrared radiation is frequency modulated (FM) there, as in the first and second embodiments. Next, this frequency-modulated infrared ray is radiated and transmitted from the infrared light emitting element 10A to the interior space of the vehicle, so that when the frequency-modulated infrared ray is received by the infrared headphones 11, the passenger can hear the first audio signal. can be heard through the headphones 11.

Next, at this time, if the first switching circuit 16 is switched and connected to another contact other than contact a, for example, contact b, the video deck 5 whose output is connected to contact b
The second audio signal obtained at the output of
, the second audio signal is supplied to the infrared wireless transmitter 10 via the second changeover switch 18B, so that the second audio signal can be emitted from the headphones 11 in the same way.

Furthermore, at this time, the interlocking first changeover switch 17A and second changeover switch 17B are connected to contact point b.
If the connection is switched to the side, the reception signal received by the reception antenna is blocked there by opening the contact a of the second changeover switch 17B, and the reception signal is blocked there by opening the contact a of the second changeover switch 17B, and the antenna connection terminal 12A of the subsequent genuine audio device 12 is connected. will no longer be supplied. At the same time, the second audio signal obtained from the output of any AV equipment, for example, the video deck 5, is switched to the first switching circuit 16, which is switched to the contact b side, and is switched to the contact b side. The RF
The RF signal obtained by modulator 14 is modulated by a second audio signal. Next, this RF modulation signal is transferred to the second changeover switch 17B connected to the contact b side.
through the antenna connection terminal 12 of the genuine audio device 12
A, and the genuine audio device 12 processes this RF modulated signal in the same way as the received signal.
A second audio signal is sent to the output terminal 12B of the audio device 12. Next, this second audio signal is supplied to the in-vehicle speaker 3 via the first changeover switch 18A connected to the contact a side, thereby providing a second audio signal in the vehicle. A signal is emitted.

Note that at this time, since no signal is supplied to the infrared wireless transmitter 10 due to the opening of the contact a of the first changeover switch 17B, no sound is emitted from the infrared headphones 11.

Next, at this time, the first changeover switch 18A and the second changeover switch 18B are connected to contact point b.
When the connection is switched to the side, the second audio signal obtained at the output terminal 12B of the genuine audio device 12 is no longer supplied to the speaker 3 by opening the contact a of the first changeover switch 18A. , no sound is emitted from the speaker 3. At the same time, this second audio signal is transferred to the first audio signal connected to contact b side.
The signal is supplied to the signal attenuation circuit 19 through the changeover switch 18A, where the level is appropriately attenuated, and then supplied to the infrared wireless transmitter 10 through the second changeover switch 18B connected to the contact b side. Similarly to the first and second embodiments, the infrared rays are frequency modulated (F
M) Do. Next, this frequency-modulated infrared ray is radiated and transmitted from the infrared light emitting element 10A to the interior space of the vehicle.
If the frequency-modulated infrared rays are received by the infrared headphones 11, the passenger can listen to the second audio signal being emitted only through the headphones 11.

[0051] Furthermore, the first changeover switch 1
8A and the second changeover switch 18B are connected to the contact b side, and when the first changeover circuit 16 is changed to another contact other than contact b, the AV connected to this switched contact is A second second audio output that serves as the output of the device.
The audio signal can be heard only through the headphones 11 as in the above example, and then when the interlocking first changeover switch 17A and second changeover switch 17B are switched to the contact a side, the reception antenna The first audio, such as radio audio obtained from the received signal received at
The audio signal can be heard only through the headphones 11 as in the previous example.

[0052] In this embodiment as well, examples of AV equipment used are not limited to those shown in the drawings, and any other AV equipment is used.
Equipment may also be used.

According to this embodiment, the genuine audio device 1
The audio signals obtained from the outputs of each of the AV devices 4 to 7 including 2 can be selectively emitted only from the in-vehicle speaker 3, or selectively emitted only from the infrared headphones 11. In addition to the genuine audio equipment 12
The first audio signal obtained at the output of
It becomes possible to selectively emit the second audio signals obtained from the outputs of the respective AV devices 4 to 7 from the infrared headphones 11 while emitting the sound only from the camera 3.

This embodiment also has the effects of the first embodiment and the second embodiment.

[0055]

As explained above, according to the invention as set forth in claim 1, the switching connection of the first changeover switch 8 allows
AV equipment 1, 4 to 7 that you want to emit from the car speaker 3
The output audio signal can be selected as appropriate, as is done with conventional devices of this type, and
By switching and connecting the second changeover switch 9, the audio signal to be emitted from the infrared headphones 11 can be changed to the above-mentioned AV.
Regardless of the selection of the output audio signals of the devices 1, 4 to 7, the selection can be made as appropriate.

[0056] Therefore, the user of the headphones 11 can enjoy sound content different from the sound content emitted from the in-vehicle speaker 3 by himself/herself without causing any inconvenience to the driver or other passengers. In addition, the headphones 11 may include:
Since it is a wireless type, it can be used from any seat in the car, and there is no need to change the wiring or plug connections even if you move the seat. be effective.

According to the invention set forth in claim 2, in addition to the effects achieved by the invention set forth in claim 1, there is an additional advantage that there is no need to make any configuration changes to the genuine audio device 12 itself. It has a certain effect.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a first embodiment of an in-vehicle audio device according to the present invention.

FIG. 2 is a block configuration diagram showing a second embodiment of the in-vehicle audio equipment of the present invention.

FIG. 3 is a specific circuit configuration diagram of main parts in the embodiment of FIG. 2;

FIG. 4 is a block diagram showing a third embodiment of the in-vehicle audio equipment of the present invention.

[Explanation of symbols]

1 Device with RF signal receiving function (radio cassette) 2 Audio amplifier 3 Car speaker 4 CD player or changer 5 Video deck 6 Television 7 DAT player or changer 8 1st
Changeover switch 9 Second changeover switch 10 Infrared wireless transmitter 11 Infrared headphones 12 Genuine audio device 13 Changeover circuit block 14 RF modulator 15 Modulated power supply 16 First changeover circuit 17 Second changeover circuit 18 Third Switching circuit 19 Signal attenuation circuit

Claims (2)

[Claims] 1. An in-vehicle audio device comprising a plurality of AV devices installed in an automobile and an in-vehicle speaker selectively connected to one of the AV devices, wherein the A.
The present invention is characterized in that an infrared rays-utilizing in-vehicle headphone device comprising an infrared wireless transmitter that is selectively connected to one of the V devices and an infrared headphone that receives transmitted information from the transmitter is disposed in the vehicle. In-vehicle audio equipment. 2. An in-vehicle audio device comprising a genuine audio device mounted in a car and having an RF input terminal, and an in-vehicle speaker connected to its output, including a plurality of in-vehicle AV devices; a switching circuit for selecting one of the outputs of the AV equipment; means for selectively coupling one output of the switching circuit to an RF input terminal of the genuine audio device via an RF modulator; An in-vehicle vehicle characterized in that an infrared rays utilizing in-vehicle headphone device comprising an infrared wireless transmitter connected to the other output of the circuit and infrared headphones receiving transmitted information from the transmitter are respectively disposed in the vehicle. audio equipment.