CN111516576A - Automobile headrest and automobile sound system - Google Patents
Automobile headrest and automobile sound system Download PDFInfo
- Publication number
- CN111516576A CN111516576A CN202010365291.XA CN202010365291A CN111516576A CN 111516576 A CN111516576 A CN 111516576A CN 202010365291 A CN202010365291 A CN 202010365291A CN 111516576 A CN111516576 A CN 111516576A
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- Prior art keywords
- speaker
- headrest
- automobile
- listening position
- user
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/80—Head-rests
- B60N2/879—Head-rests with additional features not related to head-rest positioning, e.g. heating or cooling devices or loudspeakers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q5/00—Arrangement or adaptation of acoustic signal devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
- H04R2499/10—General applications
- H04R2499/13—Acoustic transducers and sound field adaptation in vehicles
Abstract
The invention discloses an automobile headrest and an automobile sound system, which comprise: the signal source, the power amplifier who is connected with the output of signal source and set up in car headrest with one side, all towards first speaker and the second speaker that corresponds user and listen to the position, power amplifier's forward output end is connected with the positive pole of first speaker and the negative pole of second speaker simultaneously, power amplifier's reverse output end is connected with the negative pole of first speaker and the positive pole of second speaker simultaneously, user listens to the position and is not on the central extension line of first speaker and second speaker. The automobile headrest loudspeaker device and the automobile headrest loudspeaker system can better avoid passengers at other seats from listening to sound signals while guaranteeing the listening effect of the listening position of a user, so as to achieve the privacy protection effect, and are simple in structure and easy to implement.
Description
Technical Field
The embodiment of the invention relates to the technical field of acoustics, in particular to an automobile headrest and an automobile sound system.
Background
With the importance of people on privacy protection, in the speaker system of the existing automobile seat, the privacy communication design is more and more important. At present, a loudspeaker in a loudspeaker system of an automobile seat is arranged near a listening position of a driver in a symmetrical surrounding mode, so that the loudspeaker can sound symmetrically, the design of a near sound field is met, and privacy conversation is realized. However, the arrangement method in the prior art needs to depend on the isolation material of the side pillow structural member of the loudspeaker and the sound field scattering angle of the loudspeaker in the side pillow, and the requirements on the structural design and the angle design are very high.
In view of this, how to provide an automobile headrest and an automobile audio system that have simple structures and are easy to implement on the basis of realizing a privacy communication is a technical problem that needs to be solved by those skilled in the art.
Disclosure of Invention
The embodiment of the invention aims to provide an automobile headrest and an automobile sound system, which can realize privacy protection in the using process, have a simple structure and are easy to realize.
In order to solve the above technical problem, an embodiment of the present invention provides an automotive headrest, including:
the signal source, with the power amplifier that the output of signal source is connected and set up in car headrest with one side, all towards first speaker and the second speaker that corresponds user and listen to the position, wherein, power amplifier's forward output simultaneously with the positive pole of first speaker with the negative pole of second speaker is connected, power amplifier's reverse output simultaneously with the negative pole of first speaker with the positive pole of second speaker is connected, user listens to the position not in the center extension line of first speaker with the second speaker.
Optionally, a line connecting the first speaker and the second speaker is parallel to the perpendicular bisector of the car headrest.
Optionally, the first speaker is disposed on the headrest of the vehicle at a position facing the listening position of the user; the second loudspeaker is arranged on the position, far away from the head of the automobile, of the automobile headrest.
Optionally, the distance between the first speaker and the second speaker is 20 cm.
The embodiment of the invention also provides an automobile sound system which comprises the automobile headrest.
Optionally, the listening position in the same row as the user listening position is located on a middle extension line of the first speaker and the second speaker.
Optionally, the car headrest is a main driving position headrest, the user listening position is a main driving position listening position, and the listening position in the same row as the user listening position is a secondary driving position listening position.
Optionally, when the first speaker and the second speaker are located on the side of the headrest of the main driving seat far away from the passenger seat, a distance between a connecting line of the first speaker and the second speaker and the listening position of the passenger seat is 45-55 cm.
Optionally, when the first speaker and the second speaker are located on one side of the headrest of the main driving seat close to the passenger seat, a connecting line of the first speaker and the second speaker is 25-35 cm away from the listening position of the passenger seat.
The embodiment of the invention provides an automobile headrest and an automobile sound system, which comprise: the signal source, the power amplifier who is connected with the output of signal source and set up in car headrest with one side, all towards first speaker and the second speaker that corresponds user and listen to the position, power amplifier's forward output end is connected with the positive pole of first speaker and the negative pole of second speaker simultaneously, power amplifier's reverse output end is connected with the negative pole of first speaker and the positive pole of second speaker simultaneously, user listens to the position and is not on the central extension line of first speaker and second speaker.
Therefore, the automobile headrest can output signals output by a signal source to the first loudspeaker and the second loudspeaker through the power amplifier, the first loudspeaker and the second loudspeaker are connected in an opposite phase mode, the phase difference of the input signals of the first loudspeaker and the second loudspeaker is 180 degrees, low-frequency signals in sound waves emitted by the first loudspeaker and the second loudspeaker can be attenuated, the listening position of a user of a seat provided with the automobile headrest is not on the central extension lines of the first loudspeaker and the second loudspeaker, the listening effect of the listening position of the user can be guaranteed, meanwhile, passengers of other seats can be better prevented from listening to sound signals, and the privacy protection effect is achieved. The automobile headrest and the automobile sound system have simple structures and are easy to realize.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed in the prior art and the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an automotive headrest according to an embodiment of the present invention;
FIG. 2 is a schematic top view of an external structure of a headrest for a vehicle according to an embodiment of the present invention;
FIG. 3 is a schematic top view of an alternative headrest for a vehicle according to an embodiment of the invention;
fig. 4 is a schematic top view of an audio system for a vehicle according to an embodiment of the present invention;
FIG. 5 is a schematic top view of another vehicle audio system provided in accordance with an embodiment of the present invention;
fig. 6 is a graph of response frequency versus sound pressure at different positions obtained when the back cavities of the first speaker and the second speaker are closed and closely adjacent according to the embodiment of the present invention;
fig. 7 is a graph of response frequency and sound pressure at different positions obtained when the back cavities of the first speaker and the second speaker are closed and are spaced apart by 20cm according to the embodiment of the present invention.
Detailed Description
The embodiment of the invention provides an automobile headrest and an automobile sound system, which can realize privacy protection in the using process, have a simple structure and are easy to realize.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a headrest of an automobile according to an embodiment of the present invention. This car headrest includes:
the signal source 1, the power amplifier 2 that is connected with the output of signal source 1 and set up in car headrest 3 with one side, all towards corresponding first speaker 4 and the second speaker 5 of user's listening position, the forward output of power amplifier 2 is connected with the positive pole of first speaker 4 and the negative pole of second speaker 5 simultaneously, the reverse output of power amplifier 2 is connected with the negative pole of first speaker 4 and the positive pole of second speaker 5 simultaneously, the user listens the position not on the central extension line of first speaker 4 and second speaker 5.
It should be noted that, in this embodiment, the first speaker 4 and the second speaker 5 are disposed on the headrest of the vehicle and both connected to the power amplifier 2, and the first speaker 4 and the second speaker 5 are connected to the power amplifier 2 in opposite phases, so that the power amplifier 2 inverts the phase of the signal output by the signal source 1 and outputs the inverted signal to the first speaker 4 and the second speaker 5, and because the first speaker 4 and the second speaker 5 are connected in opposite phases, the phases of the input signals of the first speaker 4 and the second speaker 5 are opposite, that is, the phases are different by 180 °, so that the amplitude of the sound signals output by the first speaker 4 and the second speaker 5 after being superimposed on each other will be attenuated to some extent, wherein the low-frequency signals will be attenuated more quickly, so that the sound at other seats is weaker, and thus privacy protection can be achieved. Wherein, the low frequency attenuation of the central extension line length of two speakers is more serious, because the first speaker 4 and the second speaker 5 in this application are towards the user listening position corresponding to the seat provided with the car headrest 3 (the user listening position refers to the position corresponding to the ear after the passenger sits on the seat and the headrest is on the car headrest), and the user listening position is not on the central extension line of the two speakers (as the dotted line B in fig. 2 and fig. 3), therefore, the passenger sitting on the seat can realize the listening of the sound, that is, while guaranteeing that the passenger sitting on the seat can better listen to the sound, the privacy protection can be realized.
For example, when the automobile headrest 3 is a headrest for a main driving seat, the corresponding seat is the main driving seat, and the listening position of the user corresponds to a listening position for the main driving seat, that is, when the driver sits on the main driving seat, the position of the ear of the driver is the listening position for the main driving seat, and because the two speakers are connected in opposite phases, the phases of the input signals of the first speaker 4 and the second speaker 5 are opposite, that is, the phases are different by 180 °, so that the amplitude of the sound signals output by the first speaker 4 and the second speaker 5 after being superimposed with each other will be attenuated to a certain extent, wherein the low-frequency signals will be attenuated more quickly, so that the sound at the assistant driving seat or other positions is weaker, and privacy protection can be realized.
Further, in order to ensure that sound is transmitted to other seats in the same row of seats with good attenuation so as to prevent passengers in the other seats in the same row from hearing the sound signals emitted by the first speaker 4 and the second speaker 5, the connecting line of the first speaker 4 and the second speaker 5 in this embodiment is parallel to the perpendicular bisector of the headrest 3 of the car.
Specifically, in the present embodiment, the first speaker 4 and the second speaker 5 are disposed in tandem on one side of the car headrest 3, as shown in fig. 1, wherein the connecting line of the first speaker 4 and the second speaker 5 is disposed parallel to the perpendicular bisector (dashed line a in fig. 1, fig. 2, and fig. 3) of the car headrest 3, so that the low-frequency signals in the sound signals emitted by the first speaker 4 and the second speaker 5 can be attenuated rapidly in other seat directions in the same row, thereby achieving a better privacy protection effect.
For example, when two speakers are arranged on the headrest of the main driving seat, the first speaker 4 and the second speaker 5 can be arranged in tandem on one side of the headrest 3 of the main driving seat, that is, the connecting line of the first speaker 4 and the second speaker 5 is arranged in parallel to the perpendicular bisector of the headrest 3 of the main driving seat, so that the low-frequency signals in the sound signals emitted by the first speaker 4 and the second speaker 5 can be rapidly attenuated in the direction of the secondary driving seat, and a better privacy protection effect can be achieved.
Further, the first speaker 4 is disposed on the headrest 3 at a position facing the listening position of the user; the second speaker 5 is provided on the headrest 3 of the vehicle at a position away from the vehicle head.
Specifically, the user listening position refers to a position corresponding to an ear of a passenger sitting on the seat and resting on the headrest of the automobile, that is, the first speaker 4 is disposed on the headrest of the automobile at a position facing the ear of the passenger, and the second speaker 5 is disposed behind the first speaker 4 (specifically, at a position close to the rear seat). As shown in fig. 2 and 3, in order to make the passenger in the seat better listen to the sound, the first speaker 4 may be disposed at a listening position facing the passenger, and the second speaker 5 may be disposed at a position on the headrest 3 away from the head of the vehicle, that is, the second speaker 5 is disposed at a position corresponding to the rear of the passenger corresponding to the headrest 3 of the vehicle. The first speaker 4 and the second speaker 5 may be both disposed on the left side of the headrest of the vehicle as shown in fig. 2, or may be disposed on the right side of the headrest of the vehicle as shown in fig. 3.
Wherein, when the connecting line of the first speaker 4 and the second speaker 5 is arranged in parallel to the perpendicular bisector of the car headrest 3, the distance between the first speaker 4 and the second speaker 5 may be 20 cm. Of course, the distance between the two may also be other specific values, which may be determined according to actual needs, and the application is not particularly limited herein.
Therefore, the signal output by the signal source is output to the first loudspeaker and the second loudspeaker through the power amplifier, and the first loudspeaker and the second loudspeaker are connected in reverse phase, so that the phase difference of the input signals of the first loudspeaker and the second loudspeaker is 180 degrees, low-frequency signals in sound waves emitted by the first loudspeaker and the second loudspeaker can be attenuated, the listening position of a user of a seat arranged on a headrest of an automobile is not on the central extension lines of the first loudspeaker and the second loudspeaker, the listening effect of the listening position of the user can be ensured, meanwhile, passengers of other seats can be better prevented from listening to sound signals, and the privacy protection effect is achieved. The automobile headrest loudspeaker device and the system are simple in structure and easy to implement.
On the basis of the above embodiments, the present embodiment further provides an automobile audio system, which includes the automobile headrest in the above embodiments.
Further, in order to attenuate the low frequency at the seats in the same row to the maximum extent, in the present embodiment, after the positions of the first speaker 4 and the second speaker 5 are set on the headrest 3 of the corresponding seat, the listening position of the seat in the same row as the user listening position corresponding to the seat may be located on the middle extension line of the first speaker and the second speaker.
Specifically, the car headrest 3 may be a main driving position headrest, and the corresponding user listening position is a main driving position listening position, and a listening position in the same row as the user listening position is a secondary driving position listening position.
As shown in fig. 4 and 5, in order to explain the main driving seat and the assistant driving seat as an example (the left side is the main driving seat and the right side is the assistant driving seat in the figure), in practical application, in order to make the low frequency at the assistant driving seat attenuated to the maximum extent, in the present embodiment, after the first speaker 4 and the second speaker 5 are arranged on the headrest of the main driving seat, the assistant driving seat listening position of the automobile can be positioned on the middle extension line of the first speaker 4 and the second speaker 5, that is, after the assistant driver is seated on the assistant driving seat, the position of the ear is positioned on the middle extension line of the first speaker 4 and the second speaker 5, because the assistant driving seat listening position is on the middle extension line of the two speakers with opposite phases, the low frequency can be better attenuated, that is, the sound signals respectively emitted by the first speaker 4 and the second speaker 5 after being reversely connected can be greatly attenuated on the middle extension line of the two speakers, thereby achieving better privacy protection effect.
Specifically, when the line connecting the first speaker 4 and the second speaker 5 is arranged parallel to the perpendicular bisector of the main driver seat headrest 3, the distance between the first speaker 4 and the second speaker 5 may be 20 cm.
Specifically, as shown in fig. 4, when the first speaker 4 and the second speaker 5 are located on the side of the headrest 3 of the main driving seat away from the passenger seat, a connection line between the first speaker 4 and the second speaker 5 is 45-55 cm away from the listening position of the passenger seat, specifically 50cm, although the specific value thereof may be determined according to actual needs, and the embodiment is not particularly limited.
Specifically, as shown in fig. 5, when the first speaker 4 and the second speaker 5 are located on the side of the headrest 3 of the main driving seat close to the passenger seat, the distance between the connection line of the first speaker 4 and the second speaker 5 and the listening position of the passenger seat is 25-35 cm, specifically 30cm, although the specific value thereof may be determined according to actual needs, and the embodiment is not particularly limited.
In addition, as shown in fig. 6 and 7, wherein fig. 6 is a graph of the response frequency and the sound pressure obtained at different positions when the back cavities of the first loudspeaker and the second loudspeaker are closed and closely adjacent; a curve 61 is a curve of a response frequency and a sound pressure corresponding to a position 5cm right in front of any one of the first speaker and the second speaker (that is, a curve of a response frequency and a sound pressure corresponding to a position 5cm away from a single speaker), a curve 62 is a curve of a response frequency and a sound pressure corresponding to a position 50cm away from a middle position of a connecting line between the first speaker and the second speaker, a curve 63 is a curve of a response frequency and a sound pressure located 50cm behind a listening position of a current seat, and a curve 64 is a curve of a response frequency and a sound pressure corresponding to a position 30cm away from a middle position where the first speaker and the second speaker are continuous. FIG. 7 is a graph of the response frequency versus sound pressure obtained at different locations with the first and second speakers closed at their back chambers and at a distance of 20 cm; a curve 71 is a curve of a response frequency and a sound pressure corresponding to a position 5cm directly in front of any one of the first speaker and the second speaker, a curve 72 is a curve of a response frequency and a sound pressure corresponding to a position 50cm away from a middle position of a connecting line between the first speaker and the second speaker, a curve 73 is a curve of a response frequency and a sound pressure located 50cm behind a listening position of the current seat, and a curve 74 is a curve of a response frequency and a sound pressure corresponding to a position 30cm away from a middle position of a connecting line between the first speaker and the second speaker. Taking the main driver seat and the assistant driver seat as an example, as can be seen from fig. 6 and 7, after the first speaker and the second speaker are connected in reverse phase, the position of 50cm corresponds to the listening distance of the assistant driver seat from the main driver seat, and the position of 5cm directly in front of the single speaker corresponds to the listening distance of the main driver seat. As can be seen from the curves in fig. 6 and 7, when listening to the main driving position, the overall curve is flat when the distance between the first speaker and the second speaker is 20cm, and is higher than the sound pressure of the low frequency and the medium frequency when the two speakers are arranged closely, and the high frequency is equivalent, so that in practical application, the distance between the two speakers can be preferably set to be 20cm, and the listening sound effect of the main driving position is better; for listening to the co-pilot, no matter the two speakers are connected to the front or the rear of the middle position or the rear of the main pilot, the sound pressure is obviously weakened compared with the main pilot, and the sound pressure at the middle position of the connecting line of the two speakers (namely on the central extension line) is weakened more obviously, so that the main pilot has better privacy relative to the co-pilot by positioning the co-pilot on the central extension line of the first speaker and the second speaker.
It should be noted that the car headrest speaker system in this embodiment has the same beneficial effects as the car headrest speaker device described above, and for the specific description of the car headrest speaker device related to this embodiment, please refer to the above embodiment, which is not described herein again.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. An automotive headrest, comprising:
the signal source, with the power amplifier that the output of signal source is connected and set up in car headrest with one side, all towards first speaker and the second speaker that corresponds user and listen to the position, wherein, power amplifier's forward output simultaneously with the positive pole of first speaker with the negative pole of second speaker is connected, power amplifier's reverse output simultaneously with the negative pole of first speaker with the positive pole of second speaker is connected, user listens to the position not in the center extension line of first speaker with the second speaker.
2. The headrest for cars of claim 1, characterized in that the line connecting said first speaker and said second speaker is parallel to the perpendicular bisector of said headrest for cars.
3. The headrest for cars of claim 2, characterized in that said first speaker is disposed on said headrest for facing said user listening position; the second loudspeaker is arranged on the position, far away from the head of the automobile, of the automobile headrest.
4. The headrest for cars of claim 2, characterized in that the spacing between said first speaker and said second speaker is 20 cm.
5. A car audio system characterized by comprising the car headrest according to any one of claims 1 to 4.
6. The headrest for cars of claim 5, characterized in that a listening position in the same row as the user listening position is located on the middle extension line of the first speaker and the second speaker.
7. The speaker device for an automotive headrest according to claim 6, characterized in that the automotive headrest is a main-driver-position headrest, the user listening position is a main-driver-position listening position, and the listening position in the same row as the user listening position is a sub-driver-position listening position.
8. The speaker device for a headrest of claim 7, wherein when the first speaker and the second speaker are located on a side of the headrest of the main driving position away from the passenger seat, a line connecting the first speaker and the second speaker is 45-55 cm away from the listening position of the passenger seat.
9. The speaker device for a headrest for cars of claim 7, characterized in that when said first speaker and said second speaker are located on the side of said headrest for main driver's seat close to said passenger seat, the line connecting said first speaker and said second speaker is 25-35 cm away from the listening position for said passenger seat.
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| CN202010365291.XA CN111516576A (en) | 2020-04-30 | 2020-04-30 | Automobile headrest and automobile sound system |
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| CN202010365291.XA CN111516576A (en) | 2020-04-30 | 2020-04-30 | Automobile headrest and automobile sound system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113173132A (en) * | 2021-03-12 | 2021-07-27 | 武汉路特斯汽车有限公司 | Loudspeaker device for vehicle and vehicle |
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| CN109314810A (en) * | 2016-06-06 | 2019-02-05 | 伯斯有限公司 | Acoustic equipment |
| US10232945B2 (en) * | 2017-04-04 | 2019-03-19 | Zodiac Actuation Systems | Seat particularly for a passenger transport vehicle |
| CN110936871A (en) * | 2018-09-25 | 2020-03-31 | 通用汽车环球科技运作有限责任公司 | Positioning adjustable headrest loudspeaker |
| CN208971779U (en) * | 2018-10-24 | 2019-06-11 | 宝沃汽车（中国）有限公司 | A kind of car handsfree phone system and vehicle |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113173132A (en) * | 2021-03-12 | 2021-07-27 | 武汉路特斯汽车有限公司 | Loudspeaker device for vehicle and vehicle |
| CN113173132B (en) * | 2021-03-12 | 2023-09-19 | 武汉路特斯汽车有限公司 | Speaker device for vehicle and vehicle |
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Application publication date: 20200811 |
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