Sound transmission system

Abstract

The utility model discloses a sound transmission system, which comprises a plurality of directional sound devices and an audio time processing module, and the plurality of directional sound devices are sequentially arranged in a preset direction. The audio time processing module is electrically connected with the plurality of directional sound devices respectively, and the audio time processing module is configured to adjust the sound wave emitting time of the directional sound device according to a preset delay parameter after the directional sound devices receive audio signals, so that the sound waves between the adjacent directional sound devices are superposed in the same phase. According to the technical scheme, mutual interference of sound waves can be avoided in the sound transmission process, and therefore the definition and quality of the sound are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sound propagation, in particular to a sound propagation system. Background Art

[0002] In application scenarios involving long-distance sound coverage, such as tunnels, corridors, and large open spaces such as stadiums, traditional audio systems often face the challenge of being unable to cover the entire area alone. In order to achieve effective sound coverage, system design usually uses multiple audio devices in series to form an audio chain. The purpose of this configuration is to use the synergistic effect of each speaker to extend the sound propagation range and ensure that the sound can be transmitted evenly along the preset direction.

[0003] However, this series-connected sound system has certain technical problems in actual operation. In particular, the sound waves emitted by a speaker often interfere with the sound waves emitted by the next speaker in the process of propagating along the preset direction. This interference is mainly manifested in the inconsistency of the phase and time of the sound waves, which leads to the inability of the sound waves to effectively superimpose in phase, resulting in a decrease in sound clarity and quality, affecting the continuity of the sound and the audience's auditory experience. Utility Model Content

[0004] The main purpose of the utility model is to provide a sound propagation system, aiming to solve the technical problem that in the process of propagating sound, the existing sound propagation system is prone to low clarity and quality of sound due to mutual interference of sound waves.

[0005] To achieve the above-mentioned purpose, the sound propagation system proposed in the utility model includes multiple directional speakers and audio time processing modules, and the multiple directional speakers are arranged in sequence in a preset direction; the audio time processing modules are electrically connected to the multiple directional speakers respectively, and the audio time processing modules are configured to adjust the time for the directional speaker equipment to emit sound waves according to preset delay parameters after the directional speakers receive audio signals, so that the sound waves between adjacent directional speakers are superimposed in phase.

[0006] Optionally, in the preset direction, the intervals between any two adjacent directional speakers are set to be the same.

[0007] Optionally, the audio time module includes a phase delay device, and the phase delay device is electrically connected to the audio signal source and the multiple directional speakers respectively.

[0008] Optionally, the sound propagation system further includes a phase calculator, and the phase delay device is electrically connected to the audio signal source via the phase calculator.

[0009] Optionally, the sound propagation system also includes an audio distributor, which is electrically connected to the audio signal source, and the audio distributor is electrically connected to the multiple directional speakers respectively, and the audio distributor is configured to receive audio signals from the audio signal source and distribute the audio signals to the multiple directional speakers respectively.

[0010] Optionally, the directional sound is an ultrasonic directional sound.

[0011] Optionally, each of the ultrasonic directional speakers includes a plurality of ultrasonic transducers, and the plurality of ultrasonic transducers of the same ultrasonic directional speaker are arranged in an array.

[0012] The sound propagation system of the utility model technical solution has the following advantages:

[0013] First, by arranging multiple directional speakers in sequence along a preset direction, the system can cover a wider area. Each speaker is responsible for a specific section, thereby improving the coverage and uniformity of the sound. This arrangement allows the sound to propagate along a straight line or a specific path, reducing the energy loss of sound waves in irrelevant areas and improving the overall efficiency of the system.

[0014] Secondly, the addition of the audio time processing module is the key to solving the problem of sound wave interference in traditional audio systems. This module ensures the correct superposition of sound waves from different speakers in space by precisely controlling the moment when each speaker emits sound waves. In a system without such time adjustment, since the emission time of sound waves is not optimized and controlled, the sound waves emitted by different speakers can easily be misplaced and superimposed in space, resulting in inconsistencies in phase and time, which in turn causes unclear sound and reverberation problems. The audio time processing module calculates the necessary delay parameters based on the relative distance of each speaker to the audience and the speed of sound propagation, and adjusts the activation moment of each speaker so that the sound waves generated by all speakers can be superimposed in phase in the target area, thereby significantly improving the clarity and quality of the sound. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0016] Figure 1 It is a structural schematic diagram of an embodiment of the sound propagation system of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure when a phase delay device and a phase calculator are used.

[0018] Description of Figure Numbers:

[0019] 1. Directional sound; 2. Audio time processing module; 21. Phase delay; 22. Phase calculator; 3. Audio distributor; 4. Audio signal source.

[0020] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0023] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, "and / or" in the full text includes three solutions. Taking A and / or B as an example, it includes technical solution A, technical solution B, and technical solution that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, which must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0024] The utility model provides a sound propagation system.

[0025] In the embodiment of the present utility model, Figure 1 and Figure 2As shown, the sound propagation system includes a plurality of directional speakers 1 and an audio time processing module 2, wherein the plurality of directional speakers 1 are arranged in sequence in a preset direction; the audio time processing module 2 is electrically connected to the plurality of directional speakers 1, respectively, and the audio time processing module 2 is configured to adjust the time for the directional speakers 1 to emit sound waves according to a preset delay parameter after the directional speakers 1 receive an audio signal, so that the sound waves between adjacent directional speakers 1 are superimposed in phase.

[0026] Specifically explained, directional sound 1 is used to emit sound with precise directionality, similar to the focusing of light. The specific implementation methods of directional sound 1 may include the use of directional sound 1 devices based on ultrasonic technology. These devices use ultrasonic transducer arrays to focus and direct sound wave propagation by adjusting phase and frequency; or use traditional speaker elements that are specially designed and placed (such as traditional speakers can concentrate and guide the propagation direction of sound waves by adding sound wave guiding structures, such as horns or sound waveguides. These structures physically limit the range of sound wave diffusion, so that the sound is mainly propagated forward, reducing lateral and rearward sound leakage) to form a narrow sound wave propagation angle, thereby achieving the effect of directional propagation.

[0027] The audio time processing module 2 is an electronic device designed to control and adjust the playback time of audio signals. Its main purpose is to ensure that the sounds emitted by multiple directional speakers 1 can be synchronized in space at the correct time, thereby achieving effective superposition of sound waves and maximizing sound quality.

[0028] The specific implementation of the audio time processing module 2 can use a digital signal processor (DSP) to perform precise time delay control. The processor receives audio input and adjusts the playback time of the signal according to a preset algorithm. The specific steps can be summarized as follows:

[0029] 1. Receive audio input: DSP first receives the audio signal from the audio source.

[0030] 2. Algorithm processing: The preset algorithm refers to the instruction set pre-programmed in the DSP to guide how to process the received audio signal. These algorithms calculate the amount of delay that needs to be applied to the audio signal based on various factors (such as the signal propagation distance, sound speed, acoustic characteristics of the environment, etc.).

[0031] 3. Time delay implementation: The delay parameters calculated by the algorithm are used to adjust the playback time of the audio signal. For example, if the algorithm determines that a 10 millisecond time difference is required between the first speaker and the second speaker to achieve in-phase superposition, the DSP will ensure that the signal of the second speaker is delayed accordingly before being sent.

[0032] The specific implementation of the audio time processing module 2 can also use analog circuit design, through an electronic delay line (an electronic delay line is a network composed of electronic components (such as capacitors, inductors and resistors) to achieve signal delay. In audio processing, the electronic delay line can adjust the transmitted signal so that it has the required time delay when it reaches the output end) or related technologies to achieve sound delay processing and ensure the in-phase superposition of sound waves between the directional speakers 1.

[0033] The preset direction refers to the main direction of sound propagation determined when the sound propagation system is designed. During the design stage, one or more main sound propagation paths are determined based on the area and environmental characteristics that the sound needs to cover, and the directional speakers 1 will be arranged along these paths.

[0034] The electrical connection refers to the connection between the directional speaker 1 and the audio time processing module 2 through a cable or wirelessly, so that the audio signal and the control signal can be transmitted between them.

[0035] Specifically, the audio time processing module 2 adjusts the time when the audio equipment emits sound waves according to the preset delay parameters. For example, if the first speaker emits a sound wave, in order to make the sound wave emitted by the second speaker overlap with the sound wave of the first speaker in phase in space, the audio time processing module 2 calculates the distance from the first speaker to the second speaker and the sound propagation speed, and sets the specific time when the second speaker emits sound accordingly. This adjustment of the time ensures that the sound waves emitted by all speakers can effectively overlap in space, thereby achieving the purpose of enhancing the clarity and propagation effect of the sound.

[0036] Through this design, the sound propagation system can effectively control the directionality and timing of sound, greatly improving the propagation effect and clarity of sound in a specific environment. It is particularly suitable for sound propagation needs over long distances and in complex environments.

[0037] Optionally, in the preset direction, the intervals between any two adjacent directional speakers 1 are set to be the same. This setting means that in the preset propagation direction, each pair of adjacent directional speakers 1 maintains an equal physical distance. By maintaining an equidistant layout between the directional speakers 1, the coverage of the sound field will be more uniform. This uniformity ensures that there will be no "dead corners" of sound, that is, all areas can obtain sufficient sound coverage, avoiding fluctuations in sound intensity caused by uneven layout of the directional speakers 1.

[0038] At the same time, when the spacing between directional speakers 1 is kept consistent, this time adjustment becomes more direct and effective, and the audio time processing module 2 can more easily calculate the required delay parameters, because the time it takes for sound waves to travel from one speaker to the next is predictable and consistent, which helps to achieve precise sound wave control and optimal sound effects. Finally, the installation team can deploy the entire system based on a fixed measurement standard, reducing the complexity of calculations and adjustments, making the installation process faster and more efficient.

[0039] Optionally, the audio time module includes a phase delayer 21, and the phase delayer 21 is electrically connected to the audio signal source 4 and the plurality of directional speakers 1 respectively.

[0040] Specifically, the phase delay device 21 includes a first input interface, a first processing unit and a first output interface, wherein the first input interface receives an audio signal from an audio signal source 4, which may be an analog signal or a digital signal, depending on the system design; the first processing unit is the core of the phase delay device 21 and is composed of a digital signal processor (DSP), which is responsible for executing complex algorithms to adjust the phase and time delay of the audio signal; and the first output interface is used to send the processed audio signal to the directional speaker 1 to ensure accurate synchronization during audio playback.

[0041] The phase delay device 21 not only adjusts the delay of the signal, but also accurately controls the phase of the audio signal, which is crucial for achieving the in-phase superposition of sound waves. Moreover, since it adopts advanced DSP technology, the phase delay device 21 maintains high signal integrity while adjusting the signal delay, thereby reducing noise and distortion.

[0042] Optionally, the sound propagation system further includes a phase calculator 22 , and the phase delay device 21 is electrically connected to the audio signal source 4 via the phase calculator 22 .

[0043] The phase calculator 22 is mainly used to analyze and adjust the phase of the audio signal to ensure that the sound waves are correctly synchronized between multiple emission points. It has a second input interface, a second processing unit and a second output interface. The second input interface receives the audio signal from the audio signal source 4. The appropriate interface can be selected according to the different signal sources and system requirements, such as optical fiber, HDMI, USB or wireless receiving module. The second processing unit includes a digital signal processor (DSP) or a microprocessor, which is responsible for performing phase analysis and calculation. The second output interface sends the calculated adjustment parameters or commands to the next level, such as the phase delay device 21. The specific method can be achieved through wired (such as Ethernet, serial interface) or wireless (such as Wi-Fi, Bluetooth).

[0044] Specifically, the audio signal source 4 (such as a mixing console, a media player or other audio content generating device) sends the original audio signal to the phase calculator 22. After receiving the audio signal, the phase calculator 22 performs phase analysis on it, including measuring the phase characteristics of the signal to determine the phase configuration of the sound wave at different times and different positions. The purpose of the phase calculator 22 is to identify any phase imbalances in the signal, which may cause interference or poor sound wave effects during sound propagation. Based on the results of the phase analysis, the phase calculator 22 calculates the necessary adjustment measures to correct or optimize the phase relationship of the sound. Then, these adjustment parameters are transmitted to the phase delay device 21 through an electrical connection (which may be a wired or wireless connection), and the transmitted data includes a specific delay value and a phase correction command.

[0045] After receiving the adjustment parameters from the phase calculator 22, the phase delay device 21 performs corresponding delay processing on the audio signal emitted by each directional speaker 1, which includes accurately controlling the emission time of the audio signal and adjusting its phase when necessary, to ensure that the sound waves emitted from different speakers can be superimposed in phase at the correct time and position in space.

[0046] The adjusted audio signal is then sent to each directional speaker 1, and each speaker emits sound at the correct time point according to the received adjusted signal to achieve the predetermined sound effect and spatial coverage effect.

[0047] By introducing the phase calculator 22, the system can be dynamically adjusted according to the actual environment and acoustic requirements, making it suitable for a variety of different application scenarios, from concerts to public broadcasting systems.

[0048] It should be noted that if the phase calculator 22 is not set in the sound propagation system and only the phase delay device 21 is used, the system can still be implemented. The phase delay device 21 itself has the function of adjusting the playback time of the audio signal and can adjust the output of the audio signal according to the preset or manually input delay parameters. This means that even without the phase calculator 22 for complex phase analysis and automatic adjustment, the system can still achieve basic time synchronization through manual settings.

[0049] Optionally, the sound propagation system also includes an audio distributor 3, which is electrically connected to an audio signal source 4, and which is electrically connected to the multiple directional speakers 1 respectively. The audio distributor 3 is configured to receive audio signals from the audio signal source 4 and distribute the audio signals to the multiple directional speakers 1 respectively.

[0050] In the audio distributor 3, the received audio signal will undergo necessary processing, such as gain adjustment, format conversion, etc., to adapt to the output requirements. According to the system settings or user configuration, the internal logic of the audio distributor 3 determines how to distribute the input audio signal to each directional speaker 1, which includes determining which signals are sent to specific speakers and whether specific adjustments to the signals are required.

[0051] By centrally processing the distribution of audio signals, the audio distributor 3 simplifies the management and configuration of the sound system. The operator can centrally control the audio output without having to configure each directional speaker 1 individually. The audio distributor 3 acts as a central node to monitor and optimize the signal flow.

[0052] Optionally, the directional speaker 1 is an ultrasonic directional speaker. Ultrasonic directional speakers can accurately project sound into a very narrow area, reducing the diffusion of sound in unnecessary areas, which makes them very useful in environments that require privacy or reduce sound interference, such as museums, libraries or advertising playback.

[0053] Specifically, each of the ultrasonic directional sound devices includes a plurality of ultrasonic transducers, and the plurality of ultrasonic transducers of the same ultrasonic directional sound device are arranged in an array. Specifically, the ultrasonic transducer is a device that converts an electrical signal into an ultrasonic wave, and the array arrangement enables the directionality and focusing effect of the sound wave to be adjusted by electronically controlling the phase and amplitude.

[0054] It is worth noting that the phase delay device 21, phase calculator 22, audio distributor 3 and ultrasonic directional sound are all structures that are widely used in sound propagation systems. This application does not improve the working principles of these structures, so the internal components of each component will not be described in more detail here.

[0055] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A sound propagation system, characterized in that: include: A plurality of directional speakers (1), wherein the plurality of directional speakers (1) are arranged in sequence in a preset direction; An audio time processing module (2) is electrically connected to each of the plurality of directional speakers (1). The audio time processing module (2) is configured to adjust the time for the directional speakers (1) to emit sound waves according to a preset delay parameter after the directional speakers (1) receive an audio signal, so that the sound waves of adjacent directional speakers (1) are superimposed in phase.

2. The sound propagation system according to claim 1, characterized in that: In the preset direction, the intervals between any two adjacent directional speakers (1) are set to be the same.

3. The sound propagation system according to claim 1, characterized in that: The audio time processing module comprises a phase delay device (21), and the phase delay device (21) is electrically connected to the audio signal source (4) and the plurality of directional speakers (1) respectively.

4. The sound propagation system according to claim 3, characterized in that: The sound propagation system further comprises a phase calculator (22), and the phase delay device (21) is electrically connected to the audio signal source (4) via the phase calculator (22).

5. The sound propagation system according to claim 1, characterized in that: The sound propagation system further comprises an audio distributor (3), wherein the audio distributor (3) is electrically connected to an audio signal source (4), and the audio distributor (3) is electrically connected to the plurality of directional speakers (1) respectively, and the audio distributor (3) is configured to receive an audio signal from the audio signal source (4) and distribute the audio signal to the plurality of directional speakers (1) respectively.

6. The sound propagation system according to any one of claims 1 to 5, characterized in that: The directional sound (1) is an ultrasonic directional sound.

7. The sound propagation system according to claim 6, characterized in that: Each of the ultrasonic directional speakers comprises a plurality of ultrasonic transducers, and the plurality of ultrasonic transducers of the same ultrasonic directional speaker are arranged in an array.

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