In-vehicle voice test microphone array

Abstract

The utility model discloses an in-vehicle voice test microphone array which comprises an array support, microphones and a supporting frame, the array support is of an H-shaped structure and comprises two longitudinal beams and a cross beam, the two longitudinal beams are arranged in parallel in a spaced mode in the transverse direction, and the cross beam is connected between the two longitudinal beams; the two longitudinal beams are respectively provided with a plurality of microphones which are arranged at intervals along the longitudinal direction, and the distance between the plurality of microphones on each longitudinal beam is adjustable; the upper end of the supporting frame is connected with the bottom side of the array support in an included angle adjustable mode, so that the inclined included angle between the array support and the horizontal plane is adjustable. The array support is arranged at a set height position through the supporting frame, and the inclined included angle between the array support and the horizontal plane is adjusted by adjusting the included angle between the array support and the supporting frame according to different test scenes, so that the included angle between the microphone array plane and the horizontal plane is adjusted. And by adjusting the distance between the plurality of microphones on each longitudinal beam, the applicability in various test scenes is improved.

Description

Technical Field

[0001] This utility model relates to the field of acoustic testing equipment, and in particular to an in-vehicle voice testing microphone array. Background Technology

[0002] A microphone array bracket is a device that arranges multiple microphones in a specific position and shape for measuring sound fields. Depending on the measurement object and application scenario, microphone arrays and the brackets that fix them come in various forms.

[0003] In single-point noise measurements, the data is often unreliable. However, by spatially averaging multiple measurement points (e.g., power average), a trend representing the sound field characteristics can be obtained. In practical applications, the microphone array position needs to be referenced to the eye ellipse trajectory. In automotive audio system performance testing, microphone placement is often chosen at points consistent with the eye ellipse trajectory. However, since the data on the eye ellipse is not fully publicly available, a compromise is usually made, selecting a set of linearly arranged microphone array points. However, current microphone arrays have poor adjustability and are difficult to simulate the position of the human ear receiving sound signals. Therefore, it is difficult to arrange the points according to spatial acoustic principles and the eye ellipse position, making them unsuitable for various testing scenarios. Utility Model Content

[0004] The purpose of this utility model is to provide an in-vehicle voice test microphone array to solve one or more technical problems existing in the prior art, and at least provide a beneficial option or create conditions.

[0005] The technical solution adopted to solve the above-mentioned technical problems is as follows:

[0006] This utility model provides an in-vehicle voice testing microphone array, comprising:

[0007] The array support has an H-shaped structure. The array support includes two longitudinal beams extending in the longitudinal direction and a transverse beam extending in the transverse direction. The two longitudinal beams are arranged in parallel with a transverse interval, and the transverse beam is connected between the two longitudinal beams.

[0008] The microphones are provided on the two longitudinal beams, and a plurality of microphones are arranged at intervals along the longitudinal direction. The distance between the plurality of microphones on each longitudinal beam is adjustable.

[0009] The upper end of the support frame is adjustablely connected to the bottom side of the array bracket at an angle, so that the tilt angle between the array bracket and the horizontal plane can be adjusted.

[0010] The beneficial effects of this in-vehicle voice testing microphone array are:

[0011] In use, the array bracket is positioned at a set height via a support frame, allowing the center of the microphone array to be placed in an appropriate location within the vehicle. Depending on the test scenario, the angle between the array bracket and the support frame can be adjusted to change the tilt angle between the array bracket and the horizontal plane, thereby adjusting the angle between the microphone array plane and the horizontal plane. Furthermore, by adjusting the distance between multiple microphones on each longitudinal beam, the applicability in various test scenarios is improved.

[0012] As a further improvement to the above technical solution, the array support is equipped with an angle tester, which is used to detect the tilt angle of the array support.

[0013] As a further improvement to the above technical solution, the array support is provided with a central axis platform located on the top side of the crossbeam, and the angle tester is installed on the central axis platform.

[0014] As a further improvement to the above technical solution, the multiple microphones on each of the longitudinal beams include two adjustable microphones and a fixed microphone. The two adjustable microphones are respectively located at both ends of the longitudinal beam, and the fixed microphone is located between the two adjustable microphones. The fixed microphone and the array bracket are fixedly arranged relative to each other in the longitudinal direction, and the adjustable microphone is adjustable in the longitudinal direction.

[0015] As a further improvement to the above technical solution, each end of the longitudinal beam is provided with a sliding seat, the sliding seat is slidably mounted on the longitudinal beam along the longitudinal direction, the sliding seat is provided with a locking mechanism for locking the position of the sliding seat, and the adjustable microphone is mounted on the sliding seat.

[0016] As a further improvement to the above technical solution, the sliding seat is provided with a first microphone clamp, and the adjustable microphone is clamped in the first microphone clamp;

[0017] The central axis platform is provided with second microphone clamps on both sides, and the fixed microphone is clamped in the second microphone clamps.

[0018] As a further improvement to the above technical solution, the adjustable microphone and the fixed microphone are respectively set perpendicular to the plane where the array bracket is located;

[0019] It also includes a calibration tool, which is right-angled. The top of the sliding seat is provided with a first calibration surface, and the top of the central axis platform is provided with a second calibration surface. The second calibration surface and the first calibration surface are on the same plane and parallel to the plane where the array bracket is located. The inner corner of one end of the calibration tool is used to abut against the head of the adjustable microphone or the fixed microphone, and the other end of the calibration tool is used to abut against the first calibration surface or the second calibration surface.

[0020] As a further improvement to the above technical solution, the longitudinal beam is provided with longitudinally extending grooves at both ends, the bottom of the sliding seat is provided with a slider that slides in cooperation with the groove, and the locking mechanism includes a locking screw that passes through the bottom of the groove and is threadedly connected to the slider.

[0021] As a further improvement to the above technical solution, the side of the longitudinal beam is provided with a scale bar extending longitudinally.

[0022] As a further improvement to the above technical solution, the support frame includes a telescopic rod and a support base. The upper end of the telescopic rod is adjustablely connected to the bottom side of the crossbeam at an angle, and the lower end of the telescopic rod is connected to the support base. The array bracket is adjustablely rotatable relative to the telescopic rod around the vertical axis.

[0023] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0025] Figure 1 This is a schematic diagram of the exploded structure of an angle tester in one embodiment of the in-vehicle voice test microphone array provided by this utility model.

[0026] Figure 2 This is a schematic diagram of an embodiment of the in-vehicle voice test microphone array provided by this utility model;

[0027] Figure 3 This is a top view of an embodiment of the array support provided by this utility model;

[0028] Figure 4 This is a cross-sectional view of one embodiment of the calibration tool, longitudinal beam and sliding seat provided by this utility model in the state of engagement;

[0029] Figure 5 This is a schematic diagram of an embodiment of the calibration tool provided by this utility model;

[0030] Icon labels:

[0031] Array bracket 100; longitudinal beam 110; sliding seat 111; first microphone clamp 112; first calibration surface 113; slide groove 114; slider 115; locking screw 116; scale bar 117; crossbeam 120; central axis platform 130; magnet block 131; second microphone clamp 132; second calibration surface 133;

[0032] Support frame 200; telescopic rod 210; support base 220;

[0033] Angle tester 300;

[0034] Adjustable microphone 400;

[0035] Fixed microphone 500;

[0036] Calibration tool 600; card slot structure 610. Detailed Implementation

[0037] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0038] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0039] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0040] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0041] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are some embodiments of this utility model, not all embodiments.

[0042] Current microphone arrays have poor adjustability and are difficult to simulate the position of the human ear receiving sound signals. As a result, it is difficult to arrange the microphones according to the principles of spatial acoustics and the elliptical position of the eye, and they lack applicability in various testing scenarios. Therefore, this utility model proposes an in-vehicle voice test microphone array, which aims to provide a standardized testing tool for the performance of car audio systems. By designing an in-vehicle voice test microphone array with adjustable longitudinal spacing, its applicability in various testing scenarios is improved.

[0043] like Figure 1 As shown, the in-vehicle voice test microphone array of this embodiment includes an array bracket 100, a microphone, and a support frame 200.

[0044] Among them, such as Figures 1 to 3 As shown, the array support 100 has an H-shaped structure. Specifically, the array support 100 includes two longitudinal beams 110 extending longitudinally and a transverse beam 120 extending laterally. The two longitudinal beams 110 are arranged parallel to each other at a lateral interval, and the transverse beam 120 is connected between the two longitudinal beams 110. In this embodiment, the two longitudinal beams 110 and the transverse beam 120 are integrally formed to improve structural strength. In some other embodiments, the transverse beam 120 and the longitudinal beams 110 can be fixedly installed by assembly.

[0045] The support frame 200 is used to support the array bracket 100. The upper end of the support frame 200 is connected to the bottom side of the array bracket 100, and the angle between the support frame 200 and the array bracket 100 is adjustable so that the tilt angle between the array bracket 100 and the horizontal plane is adjustable.

[0046] In some other embodiments, the adjustable connection between the support frame 200 and the array bracket 100 can be achieved by using a swing arm connection. One end of the swing arm is hinged to the upper end of the support frame 200, while the other end of the swing arm is connected to the array bracket 100 at a height. The swing arm and the support frame 200 are connected by bolts and nuts to adjust and fix the rotation, so as to adjust the tilt angle of the array bracket 100.

[0047] Multiple microphones are arranged longitudinally at intervals on each of the two longitudinal beams 110, and the distance between the multiple microphones on each longitudinal beam 110 is adjustable.

[0048] In use, the array bracket 100 is positioned at a set height via the support frame 200, so that the center of the microphone array is placed in an appropriate position inside the vehicle. Depending on different test scenarios, the angle between the array bracket 100 and the support frame 200 is adjusted to adjust the tilt angle between the array bracket 100 and the horizontal plane, thereby adjusting the angle between the microphone array plane and the horizontal plane. Furthermore, by adjusting the distance between multiple microphones on each longitudinal beam 110, the applicability in various test scenarios is improved.

[0049] When measuring audio signals inside a vehicle, this array can simulate the sound signals received by the occupant's ears and be used to evaluate the performance of the in-vehicle audio system. The microphone array of this invention aims to simulate the position where the human ear receives sound signals. The array is arranged according to the principles of spatial acoustics and the elliptical position of the eye to reproduce the real position of the human ear as much as possible, thereby simplifying the test design and process.

[0050] Furthermore, such as Figures 1 to 3 As shown, the array bracket 100 in this embodiment is equipped with an angle tester 300. The angle tester 300 is used to detect the tilt angle of the array bracket 100. The angle between the support frame 200 and the array bracket 100 is adjusted according to the detection data of the angle tester 300 to ensure the precise adjustment of the angle between the microphone array plane and the horizontal plane.

[0051] The array support 100 of this embodiment is provided with a central axis platform 130 located on the top side of the crossbeam 120. An angle tester 300 is installed on the central axis platform 130. The crossbeam 120 of this embodiment is connected to the middle between two longitudinal beams 110. By setting the central axis platform 130 on the crossbeam 120 and setting the angle tester 300 on the central axis platform 130, the stability of the entire device can be improved.

[0052] For ease of installation, such as Figure 1 As shown, the angle tester 300 in this embodiment is installed on the central axis platform 130 by magnetic attraction. Two magnet blocks 131 are embedded in the central axis platform 130 in this embodiment, and the two magnet blocks 131 are used to attract the angle tester 300.

[0053] In this embodiment, each longitudinal beam 110 has multiple microphones, including two adjustable microphones 400 and a fixed microphone 500. The two adjustable microphones 400 are respectively located at both ends of the longitudinal beam 110, while the fixed microphone 500 is located between the two adjustable microphones 400. In this embodiment, the fixed microphone 500 is fixedly arranged relative to the array bracket 100 in the longitudinal direction, while the adjustable microphones 400 are adjustable in the longitudinal direction. This forms six microphones on the array bracket 100 to form a six-unit microphone array. The longitudinal spacing between adjacent microphones is adjusted by adjusting the longitudinal position of the adjustable microphones 400.

[0054] Regarding the installation method of the adjustable microphone 400, the two ends of the longitudinal beam 110 in this embodiment are respectively provided with sliding seats 111. The sliding seats 111 are slidably installed on the longitudinal beam 110 along the longitudinal direction. The sliding seats 111 are provided with a locking mechanism for locking the position of the sliding seats 111. The adjustable microphone 400 is installed on the sliding seats 111. When adjusting the position of the adjustable microphone 400, the locking mechanism is released, the sliding seats 111 are moved to the set position, and then locked by the locking mechanism.

[0055] In this embodiment, the fixed microphone 500 is installed on the side of the central axis platform 130. In other embodiments, the fixed microphone 500 can be installed on the longitudinal beam 110 or the cross beam 120, so that the fixed microphone 500 and the adjustable microphone 400 on each side are located on the same straight line in the longitudinal direction.

[0056] Furthermore, such as Figures 1 to 3 As shown, the sliding base 111 of this embodiment is provided with a first microphone clamp 112, and the adjustable microphone 400 is clamped in the first microphone clamp 112 to realize the quick assembly and disassembly of the adjustable microphone 400. The first microphone clamp 112 is clamped on the outer periphery of the adjustable microphone 400 so that the adjustable microphone 400 is perpendicular to the plane where the array bracket 100 is located, and the head of the adjustable microphone 400 faces the upper side of the plane where the array bracket 100 is located.

[0057] A second microphone clamp 132 is provided on each side of the central axis platform 130. The fixed microphone 500 is clamped in the second microphone clamp 132 to enable the adjustable microphone 400 to be quickly installed and removed. The second microphone clamp 132 is clamped on the outer periphery of the fixed microphone 500, which also makes the adjustable microphone 400 perpendicular to the plane on which the array bracket 100 is located. The heads of the adjustable microphone 400 and the fixed microphone 500 face the same side.

[0058] In some other embodiments, the second microphone clamp 132 and the first microphone clamp 112 are installed in a detachable connection manner, and different sizes of clamps can be replaced according to different needs so that the array is compatible with 1 / 2-inch and 1 / 4-inch microphones.

[0059] like Figure 4 and Figure 5 As shown, this embodiment also includes a calibration tool 600, which is used to calibrate the distance between the microphone head and the plane where the array bracket 100 is located. The calibration tool 600 is right-angled, with a first calibration surface 113 on the top of the sliding base 111 and a second calibration surface 133 on the top of the central axis platform 130. The second calibration surface 133 is on the same plane as the first calibration surface 113 and parallel to the plane where the array bracket 100 is located. The inner corner of one end of the calibration tool 600 is used to contact the head of the adjustable microphone 400 or the fixed microphone 500, while the other end of the calibration tool 600 is used to contact the first calibration surface 113 or the second calibration surface 133, ensuring that the head position of all microphones is accurately adjusted by the calibration tool 600 to a set distance from the plane where the array bracket 100 is located.

[0060] like Figure 3 As shown, in this embodiment, the end of the calibration tool 600 that abuts against the first calibration surface 113 or the second calibration surface 133 is a slot structure 610, which can achieve accurate positioning of the calibration tool 600 to facilitate calibration operation.

[0061] like Figures 1 to 4As shown, the longitudinal beam 110 of this embodiment has longitudinally extending grooves 114 at both ends. The bottom of the sliding seat 111 is provided with a slider 115 that slides in cooperation with the groove 114. The locking mechanism includes a locking screw 116, which passes through the bottom of the groove 114 and is threadedly connected to the slider 115. When adjusting the sliding seat 111, the locking screw 116 is loosened, the sliding seat 111 is pushed to move along the groove 114 to the set position, and then the locking screw 116 is tightened.

[0062] For ease of adjustment, such as Figure 1 and Figure 2 As shown, the longitudinal beam 110 of this embodiment has a scale bar 117 extending longitudinally on its side for precisely adjusting the spacing between microphones.

[0063] like Figure 1 and Figure 2 As shown, the support frame 200 in this embodiment includes a telescopic rod 210 and a support base 220. The upper end of the telescopic rod 210 is connected to the bottom side of the crossbeam 120 at an adjustable angle, and the lower end of the telescopic rod 210 is connected to the support base 220. The height of the array bracket 100 can be adjusted by telescopically adjusting the telescopic rod 210.

[0064] In some other embodiments, the array bracket 100 is rotatably adjustable relative to the telescopic rod 210 about a vertical axis. It is understood that the orientation of the array bracket 100 can be rotated and adjusted. A rotating top seat is provided at the upper end of the telescopic rod 210, and the array bracket 100 is rotatably mounted on the rotating top seat. The rotating top seat is rotatably adjustable relative to the telescopic rod 210 about a vertical axis. A locking screw is provided between the rotating top seat and the telescopic rod 210 to lock the rotating top seat.

[0065] When measuring audio signals inside a vehicle, if the vehicle's eye ellipse data is known, the array center should be placed in an appropriate position inside the vehicle, typically the median position of the head inside the vehicle (or other internal reference point), and this position should be recorded in subsequent tests and data analysis.

[0066] If the eye ellipse data is unknown, the center of the array can be set to the normal position where the human ear receives sound, usually with the occupant's height of 168.5cm as a reference. Record the position information of the array and related internal fixed points (steering wheel, dashboard, B-pillar, etc.). During testing, use support bracket 200 to position the center of the array at a height of 740mm above the horizontal ground inside the vehicle, with the angle between the array plane and the horizontal plane at 30°. Ensure the microphone head position is precisely adjusted using calibration tool 600 to 75.5mm from the plane of array bracket 100.

[0067] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0068] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. An in-vehicle voice test microphone array, characterized by, The array support is in the shape of H, comprising two longitudinal beams extending in the longitudinal direction and a cross beam extending in the transverse direction, the two longitudinal beams being arranged in parallel in the transverse direction with a spacing, and the cross beam being connected between the two longitudinal beams. The two longitudinal beams are respectively provided with a plurality of microphones arranged in the longitudinal direction with a spacing, and the distance between the plurality of microphones on each longitudinal beam is adjustable. The support frame is connected to the bottom side of the array support at an adjustable angle, so that the angle between the array support and the horizontal plane is adjustable.

2. The in-vehicle voice test microphone array according to claim 1, wherein the array support is provided with an angle tester for detecting the angle of the array support.

3. The in-vehicle voice test microphone array according to claim 2, wherein the array support is provided with a central axis platform on the top side of the cross beam, and the angle tester is installed on the central axis platform.

4. The in-vehicle voice test microphone array according to claim 3, wherein the plurality of microphones on each longitudinal beam comprises two adjustable microphones and a fixed microphone, the two adjustable microphones are respectively arranged at the two ends of the longitudinal beam, the fixed microphone is arranged between the two adjustable microphones, the fixed microphone is arranged in a relative fixed manner in the longitudinal direction with the array support, and the adjustable microphones are arranged in an adjustable manner in the longitudinal direction.

5. The in-vehicle voice test microphone array according to claim 4, wherein the two ends of the longitudinal beam are respectively provided with a sliding seat, the sliding seat is installed on the longitudinal beam in a sliding manner in the longitudinal direction, the sliding seat is provided with a locking mechanism for locking the position of the sliding seat, and the adjustable microphone is installed on the sliding seat.

6. The in-vehicle voice test microphone array according to claim 5, wherein the sliding seat is provided with a first microphone clamp, and the adjustable microphone is clamped on the first microphone clamp; and the two side surfaces of the central axis platform are respectively provided with a second microphone clamp, and the fixed microphone is clamped on the second microphone clamp.

7. The in-vehicle voice test microphone array according to claim 6, wherein the adjustable microphone and the fixed microphone are respectively arranged perpendicular to the plane in which the array support is located; and the calibration tool is in the shape of a right angle, the top of the sliding seat is provided with a first calibration surface, the top of the central axis platform is provided with a second calibration surface, the second calibration surface is in the same plane with the first calibration surface and is parallel to the plane in which the array support is located, one end of the calibration tool is used to abut against the head of the adjustable microphone or the fixed microphone, and the other end of the calibration tool is used to abut against the first calibration surface or the second calibration surface.

8. The in-vehicle voice test microphone array according to claim 5, wherein ​ ​ ​ ​ ​ ​ ​ ​ ​ Two ends of the longitudinal beam are provided with sliding grooves extending in the longitudinal direction, the bottom of the sliding seat is provided with sliding blocks in sliding fit with the sliding grooves, and the locking mechanism comprises a locking screw in threaded connection with the sliding blocks through the bottom of the sliding grooves.

9. The in-vehicle voice test microphone array of claim 1, wherein: The side surface of the longitudinal beam is provided with a scale bar extending in the longitudinal direction.

10. The in-vehicle voice test microphone array of claim 1, wherein: The support frame comprises a telescopic rod and a support base, the upper end of the telescopic rod is connected to the bottom side of the cross beam at an adjustable angle, the lower end of the telescopic rod is connected to the support base, and the array support frame is arranged to rotate around a vertical axis relative to the telescopic rod.

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