XY loudspeaker playback structure

Abstract

The utility model relates to the technical field of acoustic devices, in particular to an XY loudspeaker replay structure, which is characterized in that two loudspeakers are respectively arranged on two axes which are perpendicular to each other, and vibrating diaphragms of the two loudspeakers are partially overlapped in a Z-axis direction, so that the two loudspeakers emit same sound channel signals, and phase offset caused by phase difference is avoided. The utility model has the advantages that: the elimination of phase offset is realized; and when the two loudspeakers play the same signal and no time delay exists, the phase offset phenomenon possibly occurring in the traditional multi-loudspeaker system is effectively prevented. And the sound energy radiation range is obviously expanded: the superimposed effect of the signals of the two loudspeakers can create an ultra-wide directional coverage area which can generally reach 180 degrees, so that the sound energy radiation range is obviously expanded. The sound coverage effect is enhanced: through the specific loudspeaker layout, the sound is covered more widely, a more uniform sound field effect is provided, and the loudspeaker is suitable for occasions requiring wide sound coverage.

Description

Technical Field

[0001] This utility model relates to the field of acoustic device technology, specifically an XY loudspeaker playback structure. Background Technology

[0002] Current audio systems typically employ single loudspeakers or arrays of multiple loudspeakers for sound energy radiation. However, a single loudspeaker usually has a limited sound energy radiation range, and the phase difference between multiple loudspeakers can easily lead to inaccurate sound source localization and uneven sound field.

[0003] Therefore, there is an urgent need to design a speaker playback structure that can avoid phase difference during speaker playback. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an XY speaker playback structure to eliminate the phase difference generated during speaker playback and optimize the speaker playback effect.

[0005] To achieve the above objective, an XY loudspeaker playback structure is designed, comprising two loudspeakers respectively positioned on two mutually perpendicular axes. The diaphragms of the two loudspeakers partially overlap in the Z-axis direction, so that the two loudspeakers emit the same channel signal, avoiding phase cancellation caused by phase difference.

[0006] Preferably, the present invention further includes: a fixed bracket, wherein the fixed bracket is provided with a graduated slide rail; two adjusting devices, each adjusting device comprising: an inner sleeve disposed at the upper part; an outer sleeve disposed at the lower part, the outer sleeve being sleeved and slidably engaged with the inner sleeve for adjusting the height of the adjusting device, the bottom of the outer sleeve being slidably engaged with the slide rail of the fixed bracket; a quick-tightening screw disposed on the outer sleeve for sliding locking of the inner sleeve and the outer sleeve; and a universal ball joint locking mechanism disposed at the top of the inner sleeve, the other end of which is connected to the speaker, the universal ball joint locking mechanism being used to adjust the speaker angle.

[0007] Preferably, the present invention further includes: a gap is left between the two speakers along the Z-axis.

[0008] Preferably, the present invention further includes: two speakers are cardioid subwoofers, which expands the sound energy radiation range and accurately locates the sound source.

[0009] Compared with the prior art, the advantages of this utility model are:

[0010] 1. Elimination of phase cancellation: When two speakers play the same signal and there is no time delay, it effectively prevents the phase cancellation phenomenon that may occur in traditional multi-speaker systems.

[0011] 2. Significantly extended sound energy radiation range: The superposition effect of the signals from the two loudspeakers can create an ultra-wide directional coverage area, typically up to 180 degrees, thus significantly extending the sound energy radiation range.

[0012] 3. Enhanced sound coverage: This specific speaker layout provides wider sound coverage and a more uniform sound field, making it suitable for applications requiring broad sound coverage. Attached Figure Description

[0013] Figure 1 This is a top view of the present invention;

[0014] Figure 2 The arrangement of the loudspeakers in this utility model is shown below.

[0015] In the diagram: 1. Speaker, 2. Diaphragm, 3. Mounting bracket, 4. Quick-release screw, 5. Universal ball joint locking mechanism, 6. Axis, 7. Cardioid pointing diagram. Detailed Implementation

[0016] To make the purpose, principle and structure of this utility model clearer, the following description is provided in conjunction with the accompanying drawings and specific embodiments.

[0017] Example 1:

[0018] See Figure 1 This utility model provides an XY loudspeaker playback structure, comprising:

[0019] Two loudspeakers 1 are connected to an adjustment device via a universal ball joint locking mechanism 5. The adjustment device is slidably engaged with a fixed bracket 3. The front end of each loudspeaker 1 has a diaphragm 2, which is used to produce sound. Both loudspeakers 1 are cardioid loudspeakers. The cardioid pointing diagram 7 in the figure is a polar coordinate diagram used to illustrate the cardioid pointing characteristics of the loudspeakers.

[0020] Fixed bracket 3, which is equipped with a graduated slide rail.

[0021] Two adjusting devices are provided, each consisting of an inner sleeve and an outer sleeve (not shown in the attached diagram). The inner sleeve is located at the upper part of the adjusting device, and the outer sleeve is located at the lower part. The outer sleeve is fitted and slidably connected to the inner sleeve. A quick-tightening screw 4 is provided on the outer sleeve, penetrating the outer sleeve and pressing its end against the wall of the inner sleeve when tightened. The quick-tightening screw 4 is used to lock and unlock the inner and outer sleeves. Furthermore, the bottom of the outer sleeve slides along the slide rail of the fixed bracket 3. The sliding engagement between the outer and inner sleeves allows for height adjustment of the adjusting devices, and the sliding engagement between the outer sleeve and the fixed bracket 3 allows for distance adjustment between the two adjusting devices. A universal ball joint locking mechanism 5 is also provided at the top of the outer sleeve. The top of the universal ball joint locking mechanism 5 is connected to the speaker 1, and the universal ball joint locking mechanism 5 allows for multi-angle adjustment of the speaker 1 via the universal ball joint and locking after angle adjustment via the locking mechanism. The individual height adjustment, individual angle adjustment, and distance adjustment between the two adjustment devices enable individual height adjustment, individual angle adjustment, and distance adjustment between the two speakers 1 mounted on the adjustment devices.

[0022] Furthermore, the space in this embodiment is divided into a coordinate system composed of three axes: X, Y, and Z. These three axes are perpendicular to each other. Under the adjustment of the adjustment device, the axes of the two speakers 1 are respectively placed on the X and Y axes. Projecting the coordinate system onto the XY plane along the Z axis, the diaphragms 2 of the two speakers 1 partially overlap on the XY plane. That is, the two speakers 1 partially overlap on the Z axis, and there is a gap between the two speakers 1 on the Z axis, meaning they do not touch. This ensures that the two speakers 1 emit the same channel signal, avoiding phase cancellation caused by phase difference.

[0023] Based on the device structure of this invention, when two speakers 1 play the same sound source, the two speakers 1 are placed on two mutually perpendicular XY axes at an angle of 90 degrees. Each speaker 1 emits a signal from the same channel, and the signal amplitudes of the two speakers 1 are the same. Furthermore, since there is no time difference, phase cancellation problems are avoided. When the two speakers 1 emit sound simultaneously, because their emitted sound waves have no phase difference, the sound amplitudes will superimpose within a certain angular range, forming a relatively wide sound field. Specifically, the combination of these two speakers 1 can provide a sound energy radiation range with a coverage angle of up to 180 degrees. Especially within the angular range between the two speakers 1, the interference effect of the sound waves can effectively enhance the sound propagation effect. Since the directivity of the speakers 1 is usually cardioid, the combination of the two speakers can utilize their respective directivity to widen the sound coverage area without causing phase problems, avoiding the phase inconsistency and uneven sound coverage problems common in traditional multi-speaker systems.

[0024] In this embodiment, two loudspeakers with a directivity of 60 degrees are used. The sound energy of each loudspeaker is 60 degrees directivity, and its sound energy is maintained attenuated by no more than 6dB within a range of ±30 degrees, that is, its sound pressure is kept relatively uniform within this range.

[0025] It is worth noting that:

[0026] Existing technologies include XY-system stereo pickup, but pickups convert sound waves into electrical signals, while loudspeakers convert electrical signals into sound waves. This difference in conversion methods leads to different design and application challenges. For example, in loudspeaker design, electrical and mechanical characteristics (such as diaphragm, magnetic field, and coil impedance) significantly influence the audio signal, while pickup operation involves capturing weak acoustic signals as well as amplifying and transmitting electrical signals.

[0027] See Figure 2 The key feature of this invention lies in precisely controlling the phase relationship, signal amplitude, and directivity of the two cardioid speakers by controlling and adjusting their specific positional relationship and synchronized sound source signals. This eliminates sound wave interference and phase cancellation problems. This differs from traditional speaker configuration methods, and is particularly effective in constructing a sound field with good uniformity over a large coverage area.

[0028] In the field of multi-speaker systems, avoiding acoustic wave interference (especially phase cancellation) is a key issue in multi-speaker system design. In the XY loudspeaker playback structure of this invention, avoiding acoustic wave interference mainly relies on the following aspects:

[0029] Identical signal amplitude and no time difference: Both speakers play the same signal, and there is no time delay between the two speakers (i.e., time synchronization). Time synchronization means that the sound waves emitted by the two speakers are exactly the same, with no timing differences, so there will be no phase misalignment or cancellation due to time differences. Even if the two speakers are located at different angles, their signals will not be misaligned due to delay on their path to the listener's ear, avoiding interference caused by phase differences.

[0030] Phase control and interference issues: In traditional multi-speaker systems, especially when the speakers are located at different positions, sound waves experience time differences due to distance variations, leading to phase differences. However, in this invention, by employing an XY speaker reproduction structure and ensuring that the two speakers maintain phase consistency (i.e., synchronized sound emission), interference and attenuation problems caused by time or phase differences can be effectively avoided. Furthermore, because the two speakers are at a certain angle (90 degrees) in space, their sound fields can smoothly overlap and superimpose, rather than directly clashing, thus avoiding phase cancellation that may occur in traditional configurations.

[0031] Physical principle: According to the principle of sound wave superposition, if the signals emitted by two loudspeakers have the same amplitude and are synchronized, their sound waves at the listener's location will directly superimpose, forming a stronger sound pressure level. This superposition effect not only does not lead to attenuation, but also enhances the sound energy coverage range.

[0032] Example 2:

[0033] Based on Example 1, an XY loudspeaker playback structure is used to construct a left and right dual-channel stereo sound reinforcement system.

[0034] In a stereo system with left and right channels, the left channel is simultaneously emitted by two speakers (1) positioned at a 90-degree angle. The signals from these two speakers (1) are identical and without time difference, thus avoiding the phase cancellation problem common in traditional multi-speaker systems. This significantly increases the sound radiation range of the left channel, typically covering a larger area, resulting in a more uniform sound distribution and an enhanced listening experience. The same principle applies to the right channel; the two speakers (1) are also arranged at a 90-degree angle and simultaneously emit the same right channel signal, thereby extending the coverage of the right channel.

[0035] Compared with traditional single left and right speakers, the XY speaker reproduction structure of this invention can significantly increase the coverage area of ​​the left and right channels, making the sound distribution of the overall listening area more uniform, reducing dead zones and areas with insufficient sound, and providing a wider listening space.

[0036] Example 3:

[0037] Based on Embodiment 1, an XY speaker playback structure is used to construct a surround sound and 3D spatial audio system.

[0038] The advantages of the XY speaker reproduction structure are also evident in surround sound systems and 3D spatial audio applications. In traditional surround sound systems, the speakers in the surround channels are typically positioned at specific angles to cover the space around the viewer. However, the traditional surround channel coverage angle is relatively small, which can easily lead to uneven coverage or dead zones.

[0039] By adopting an XY speaker reproduction structure, the surround channel speakers can also emit signals simultaneously by being arranged at a 90-degree angle, thereby significantly increasing the horizontal coverage area, especially the coverage area of ​​the left and right surround channels. This method effectively expands the coverage area of ​​the surround channels, not only increasing the sound propagation distance but also making the surround sound effect more balanced and three-dimensional, further enhancing the listener's immersion.

[0040] Furthermore, in 3D spatial audio systems, the XY speaker reproduction structure can provide a wider sound field coverage, adapting to the needs of different spatial layouts. By using the XY speaker reproduction structure in multiple directions, more precise spatial sound positioning and coverage can be achieved, meeting the high requirements of 3D audio systems for sound field.

[0041] Example 4:

[0042] Building upon Example 1, the directivity of a loudspeaker can actually be selected according to the specific application requirements. Common directivity angles include 45 degrees, 60 degrees, and 90 degrees. For example, a 45-degree directivity loudspeaker is suitable for applications requiring strong focusing, while a 90-degree or wider directivity is suitable for applications with broad coverage. Different directivity angles will vary depending on the loudspeaker design and the actual application requirements. As the directivity angle increases, the difficulty and technical challenges of implementation also increase.

[0043] The core innovation of this invention lies in achieving a wider and more uniform sound field coverage through reasonable speaker layout and signal superposition, rather than being limited to the directivity of a specific angle.

[0044] Directivity data (the range of directivity and sound energy attenuation) generally comes from experimental data, simulations, or theoretical derivations based on known loudspeaker directivity models. Commonly used testing equipment includes Klippel Audio equipment. Commonly used computer simulation software includes EASE and Odeon. Typically, loudspeaker directivity is obtained through actual measurement or simulation. Directivity: Loudspeaker directivity is usually quantified by a directivity factor (such as the Q factor). For common loudspeakers, directivity typically exhibits a conical or elliptical propagation pattern, and its coverage angle can be calculated based on the loudspeaker's design (such as the size of the speaker and driver, frequency response, etc.). For example, for a loudspeaker designed with 60-degree directivity, the directivity angle is typically ±30 degrees within its effective operating frequency range, and the sound energy attenuation will not exceed 6dB. Directivity can be calculated using the loudspeaker's radiation mode. Common calculation methods utilize sound radiation theory and wave equations, combined with factors such as loudspeaker size, frequency response, and speaker design to derive its directivity function. Commonly used formulas involve the radiation mode of the sound source, distance attenuation, and frequency characteristics. Through numerical simulation and experimental verification, the directivity data of a specific loudspeaker can be obtained.

[0045] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and novel concept of this utility model, should be included within the protection scope of this utility model.

Claims

1. An XY loudspeaker playback configuration comprising two loudspeakers, characterized in that, The two loudspeakers are arranged on two mutually perpendicular axes, and the diaphragms of the two loudspeakers partially overlap in the Z-axis direction, so that the two loudspeakers emit the same sound channel signals, and avoid phase cancellation caused by phase difference.

2. An XY speaker playback structure as claimed in claim 1, characterized in that Further comprising: A fixed support provided with a sliding rail with a scale; Two adjusting devices, the adjusting device comprising: An inner sleeve provided on the upper part; 3. An XY speaker playback structure as claimed in claim 1, characterized in that An outer sleeve provided on the lower part, the outer sleeve being sleeved and slidingly matched with the inner sleeve, for adjusting the height of the adjusting device, the bottom of the outer sleeve being slidingly matched with the sliding rail of the fixed support; a quick screw provided on the outer sleeve, for slidingly locking the inner sleeve and the outer sleeve; a universal ball shaft locking mechanism provided on the top of the inner sleeve, the other end of the universal ball shaft locking mechanism being connected with the loudspeaker, the universal ball shaft locking mechanism being used for adjusting the angle of the loudspeaker.

4. An XY speaker playback structure as claimed in claim 1, characterized in that, A gap is left between the two loudspeakers in the Z-axis direction. The two loudspeakers are heart-shaped and point to the subwoofer, so that the sound energy radiation range is expanded and the sound source positioning is accurate.

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