In-vehicle sound image position measuring method
By building a reference triangle and using geometric principles to accurately measure the audio-image position in the car, the problem of audio-image position positioning in the existing technology is solved, and the scientific configuration and debugging of car audio is realized.
Patent Information
- Application Number
- CN202411842602.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2025-02-25
AI Technical Summary
In the prior art, the positioning of the audio-visual position depends on the subjective listening of professionals, which is prone to inappropriate audio-visual position due to differences in the audio-visual staff, which affects the audio-visual performance.
By setting the listening position as the first vertex and the speaker position as the second and third vertices, a reference triangle is constructed, and the target sound image position is measured using geometric principles.
It realizes accurate and reliable objective measurement of the sound and image position in the car, solves the problem of sound and image position offset caused by subjective listening, and improves the scientific nature of the configuration and debugging of the car audio.
Smart Images
Figure CN119511202A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of automobile audio, and in particular to a method for measuring the position of sound and image in a vehicle. Background Art
[0002] With the development of car audio technology, users have higher and higher requirements for audio performance. Car audio performance can be divided into two aspects: timbre and sound image space performance. Among them, consumers are more sensitive to sound image space performance than timbre.
[0003] The sound image position is generally understood to be the virtual position after the sound emitted by multiple speakers is processed by the human ear. Therefore, in actual positioning, it mainly depends on professionals to determine it through listening and subjective judgment.
[0004] However, this process will inevitably result in the determined sound and image positions not being the optimal ones due to differences among listeners. If the cockpit sound system is then built in this way, the overall sound and image will be blurred and erratic, the width of the sound and image will change, and the sound and image restoration ability will deteriorate, which has a great impact on the sound performance. Summary of the invention
[0005] In view of the above, the present invention aims to provide a method for measuring the position of sound and image in a vehicle to solve the above-mentioned technical problems.
[0006] The technical solution adopted by the present invention is as follows:
[0007] The present invention provides a method for determining the position of sound and image in a vehicle, comprising:
[0008] Set the listening position;
[0009] Taking the listening position as the first vertex, taking the speaker positions on both sides of the listening position as the second vertex and the third vertex, and constructing a reference triangle, wherein the second vertex and the third vertex constitute the base of the reference triangle, the first vertex and the second vertex constitute the first side of the reference triangle, and the first vertex and the third vertex constitute the second side of the reference triangle;
[0010] If the lengths of the first side and the second side are not equal, an extension line of the shorter side is drawn from the first vertex to the vertex corresponding to the shorter side;
[0011] Set a reference point on the extension line so that the length from the first vertex to the reference point is equal to the length of the longer side;
[0012] A reference side is formed by the reference point and the vertices corresponding to the longer side, and a perpendicular line is drawn from the first vertex to the reference side;
[0013] The intersection point of the vertical line and the bottom edge is determined as the target sound image position.
[0014] In at least one possible implementation manner, setting the listening position includes: determining based on a seat in the vehicle.
[0015] In at least one possible implementation manner, setting the listening position further includes: setting the listening position in the middle of the seat headrest.
[0016] In at least one possible implementation manner, constructing the reference triangle includes: projecting an original triangle determined by three vertices onto a horizontal plane based on where the second vertex and the third vertex are located, to obtain a reference triangle.
[0017] In at least one possible implementation, pairs of loudspeakers that are symmetrically arranged with respect to the longitudinal direction of the cabin are respectively set as the second vertex and the third vertex.
[0018] In at least one possible implementation manner, the measuring method further includes: if the first side and the second side are of equal length, taking the midpoint of the bottom side as the target sound image position.
[0019] Compared with the prior art, the main design concept of the present invention is to combine the listener's seat position in the cockpit and the speaker positions deployed on both sides of the car, and use geometric principles to objectively determine the relatively optimal sound and image position, solving the problem that subjective listening to sound and image positioning relies on manual experience and is prone to deviation. The present invention can accurately and reliably measure and calculate the sound and image position in the car objectively, providing a scientific and popularizable guidance basis for the configuration and debugging of car audio. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described below with reference to the accompanying drawings, in which:
[0021] Figure 1 A schematic diagram of a flow chart of a method for determining the position of sound and image in a vehicle provided by an embodiment of the present invention;
[0022] Figure 2 A top view reference diagram of a method for determining the position of sound and image in a vehicle provided by an embodiment of the present invention. DETAILED DESCRIPTION
[0023] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be interpreted as limiting the present invention.
[0024] The present invention provides an embodiment of a method for determining the position of sound and image in a vehicle. Specifically, Figure 1 shown, including:
[0025] Step S1, setting the listening position; it can be supplemented that the listening position is determined based on the seats in the car, and is not limited to the driver's seat, the front passenger seat, etc. Of course, in some better embodiments, the listening position can be more accurately set in the middle of the seat headrest, which is relatively closer to the center of the ears of the real user sitting on the seat.
[0026] Step S2, taking the listening position as the first vertex, and the speaker positions on both sides of the listening position as the second vertex and the third vertex, and constructing a reference triangle, wherein the second vertex and the third vertex constitute the base of the reference triangle, the first vertex and the second vertex constitute the first side of the reference triangle, and the first vertex and the third vertex constitute the second side of the reference triangle; it can be supplemented here that when constructing the reference triangle, it can refer to projecting the original triangle determined by the three vertices onto a horizontal plane based on the second vertex and the third vertex to obtain the reference triangle.
[0027] Step S3: if the lengths of the first side and the second side are not equal, an extension line of the shorter side is drawn from the first vertex toward the vertex corresponding to the shorter side (which may be the second vertex or the third vertex);
[0028] Step S4, setting a reference point on the extension line so that the length from the first vertex to the reference point is equal to the length of the longer side;
[0029] Step S5, forming a reference edge by the reference point and the vertices corresponding to the longer side edge, and drawing a perpendicular line from the first vertex to the reference edge;
[0030] Step S6: determine the intersection of the vertical line and the bottom edge as the target sound image position.
[0031] Two additional points can be added here. First, the speakers at the second and third vertices of the reference triangle are paired speaker groups symmetrically arranged relative to the cockpit, such as the left front / right front speakers near the front row, or the left front door / right front door speakers, or the left rear door / right front door speakers. Of course, in some car models, it can also refer to paired and symmetrically arranged speakers on both sides of the roof, which will not be elaborated in the present invention. Second, the above mentioned are most of the cases of constructing reference triangles, but it does not exclude the construction of a reference triangle whose first side is equal to the second side (for example, when the rear center seat is used as the listening position). In this scenario, the midpoint of the bottom edge can be directly used as the target sound image position.
[0032] Finally combined Figure 2 , take the left and right front speakers of a car and the driver's seat as an example, where the left front speaker is the second vertex A, the right front speaker is the third vertex B, and the driver's seat is the first vertex O; construct the extension line of OA (the first side) to obtain OA1 (A1 is the reference point) equidistant from OB (the second side); then, draw a vertical line perpendicular to A1B (reference side) from point O and intersect A1B at O2, and the vertical line OO2 intersects AB (base) at point O1, then determine the relative position to the current point O, and point O1 is the target sound image position in this scene.
[0033] In summary, the main design concept of the present invention is to combine the seat position of the listener in the cockpit and the position of the speakers deployed on both sides of the car, and use geometric principles to objectively determine the relatively optimal sound and image position, solving the problem that subjective listening to sound and image positioning relies on manual experience and is prone to deviation. The present invention can accurately and reliably measure and calculate the sound and image position in the car objectively, providing a scientific and popularizable guidance basis for the configuration and debugging of car audio.
[0034] If the expressions expressing orientation are mentioned in the embodiments of the present invention, they are relative concepts based on the embodiments. In addition, "at least one" means one or more, and "plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent the existence of A alone, the existence of A and B at the same time, and the existence of B alone. Among them, A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following" and similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b and c can be represented by: a, b, c, a and b, a and c, b and c, or a and b and c, wherein a, b, c can be single or multiple.
[0035] The above describes in detail the structure, features and effects of the present invention based on the embodiments shown in the drawings, but the above is only a preferred embodiment of the present invention. It should be noted that the technical features involved in the above embodiments and their preferred methods can be reasonably combined and matched into a variety of equivalent schemes by those skilled in the art without departing from or changing the design ideas and technical effects of the present invention; therefore, the present invention is not limited to the scope of implementation shown in the drawings, and all changes made in accordance with the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the specification and drawings, should be within the protection scope of the present invention.
Claims
1. A method for measuring the position of sound and image in a vehicle, characterized in that: include: Set the listening position; Taking the listening position as the first vertex, taking the speaker positions on both sides of the listening position as the second vertex and the third vertex, and constructing a reference triangle, wherein the second vertex and the third vertex constitute the base of the reference triangle, the first vertex and the second vertex constitute the first side of the reference triangle, and the first vertex and the third vertex constitute the second side of the reference triangle; If the lengths of the first side and the second side are not equal, an extension line of the shorter side is drawn from the first vertex to the vertex corresponding to the shorter side; Set a reference point on the extension line so that the length from the first vertex to the reference point is equal to the length of the longer side; A reference side is formed by the reference point and the vertices corresponding to the longer side, and a perpendicular line is drawn from the first vertex to the reference side; The intersection point of the vertical line and the bottom edge is determined as the target sound image position.
2. The method for measuring the position of sound and image in a vehicle according to claim 1, characterized in that: The setting of the listening position includes: determining based on a seat in the vehicle.
3. The method for measuring the position of sound and image in a vehicle according to claim 2, characterized in that: The step of setting the listening position further comprises: setting the listening position in the middle of the seat headrest.
4. The method for measuring the position of sound and image in a vehicle according to claim 1, characterized in that: The construction of the reference triangle includes: projecting the original triangle determined by three vertices onto a horizontal plane based on the second vertex and the third vertex to obtain the reference triangle.
5. The method for measuring the position of sound and image in a vehicle according to claim 1, characterized in that: The pairs of loudspeakers that are symmetrically arranged with respect to the longitudinal direction of the cockpit are respectively set as the second vertex and the third vertex.
6. The method for measuring the position of sound and image in a vehicle according to any one of claims 1 to 5, characterized in that: The measuring method further includes: if the first side and the second side are of equal length, taking the midpoint of the bottom side as the target sound image position.