A large conference room distributed sound device

Abstract

The application provides a large conference room distributed sound device, and belongs to the technical field of sound layout. The large conference room distributed sound device specifically comprises the following steps: comprising a main sound box, a secondary sound box group and an audio coordination controller. The main sound box is arranged at the front of a conference center. The secondary sound box group comprises a first-level secondary sound box, a second-level secondary sound box and a third-level secondary sound box. The first-level secondary sound box, the second-level secondary sound box and the third-level secondary sound box are arranged at different areas of the conference room. The audio coordination controller is electrically connected with the main sound box and the secondary sound box group. The audio coordination controller is internally provided with a memory, a processor and a sound pickup device. The sound pickup device is placed at different areas of the conference room. The memory stores program instructions. When the processor executes the program instructions, the step of controlling the audio coordination output of the main sound box and the secondary sound box group is executed. The application solves the problem of large sound delay of the existing large conference room sound device and layout.

Description

Technical Field

[0001] This invention belongs to the field of sound system layout technology, and more specifically, relates to a distributed sound system for large conference rooms. Background Technology

[0002] An echo is an effect, the sound that bounces back after it has traveled through the air. It's like shouting into a valley and hearing the echo again shortly afterward. To hear your own echo, there needs to be a delay of at least 0.1 seconds, so the distance to the reflecting object must be at least 17 meters. Echoes are a common sound phenomenon in our daily lives. When sound waves travel, they encounter large reflective surfaces (such as building walls) and are reflected at the interface. The reflected sound waves that can be distinguished from the original sound are called echoes. The human ear can distinguish echoes when the reflected sound has a sufficiently high intensity and the time difference between it and the original sound is greater than 0.1 seconds. The echo is clearest when the size of the reflecting surface is much larger than the wavelength of the incident sound. Large conference rooms typically have an area of ​​over 100 square meters. In existing large conference rooms, the speakers are placed at the front. When someone sitting at the front speaks, the sound travels backward through the speakers. Due to the length of the conference room, the sound delay is greater than 100ms. At this point, people sitting at the back of the conference room will clearly feel the sound delay. For some very large conference rooms, the length can exceed 17m. In this case, the sound delay can reach more than 0.1s. At this point, people in the conference room will not only hear the delay but also hear an echo.

[0003] Currently, most existing sound systems and layouts in large conference rooms suffer from significant sound delay. Summary of the Invention

[0004] In view of this, the present invention provides a distributed sound system for large conference rooms, which aims to solve the problem of large sound delay in existing sound systems and layouts for large conference rooms.

[0005] This invention is implemented as follows:

[0006] This invention provides a distributed sound system for a large conference room, comprising a main speaker, a group of sub-speakers, and an audio coordination controller. The main speaker is located at the front of the conference center. The group of sub-speakers includes a first-level sub-speaker, a second-level sub-speaker, and a third-level sub-speaker, which are located in different areas of the conference room. The audio coordination controller is electrically connected to the main speaker and the group of sub-speakers. The audio coordination controller includes a memory, a processor, and microphones, which are placed in different areas of the conference room. The memory stores program instructions, and the processor executes these program instructions to control the coordinated audio output of the main speaker and the group of sub-speakers.

[0007] The technical effects of the distributed sound system for a large conference room provided by this invention are as follows: By setting up a main speaker and a group of secondary speakers, the group of secondary speakers includes a first-level secondary speaker, a second-level secondary speaker, a third-level secondary speaker, and a fourth-level secondary speaker. By distributing the first-level secondary speaker, the second-level secondary speaker, the third-level secondary speaker, and the fourth-level secondary speaker to different areas, and by executing the steps of controlling the coordinated audio output of the main speaker and the group of secondary speakers through an audio coordination controller, the delay caused by the propagation of the main speaker is minimized to the greatest extent, thereby reducing the latency of the sound.

[0008] Based on the above technical solution, the large conference room distributed sound device of the present invention can be further improved as follows:

[0009] The step of controlling the coordinated audio output of the main speaker and the secondary speaker group specifically includes:

[0010] S100: Obtain the coordinates of the sub-speaker group, the current volume, and the receiving range, wherein the receiving range refers to the receiving range above the first fixed decibel;

[0011] S200: Obtain the echo range of the main speaker, wherein the echo range refers to the receiving range above the second fixed decibel;

[0012] S300: Divide the conference room into multiple areas, calculate the audio arrival time for each area, and obtain the time difference between the main audio and the secondary audio arriving in each area;

[0013] S400: Adjusts the emission time of the sub-audio in different regions according to the time difference, so that the arrival time of the main audio and the sub-audio in each region is less than the rated time difference.

[0014] The beneficial effects of adopting the above-mentioned improved scheme are as follows: by dividing the conference room into multiple areas and calculating the arrival time of the audio in each area, the time difference between the main audio and the audio obtained by the above method is used to adjust the time difference of each area according to the time difference of different areas, so that the time when the audience in each area hears the same content is consistent, and the time difference of hearing the same content in different areas is minimized to the greatest extent.

[0015] Furthermore, the pickup includes a fixed pickup and a movable pickup.

[0016] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by combining mobile pickup with fixed pickup, the accuracy of pickup is improved.

[0017] Furthermore, the processor internally includes a first microphone unit, a second microphone unit, and a positioning unit, wherein...

[0018] The first microphone unit is used to represent the reception record of non-audible sound received by the fixed microphone from the main speaker and multiple sub-speaker groups, and to obtain it by establishing an association with the ID of the fixed microphone, wherein the fixed microphone uses its own timer to obtain the reception time of the non-audible sound from the main speaker and multiple sub-speaker groups.

[0019] The second sound receiving unit is used to retrieve audio information from a memory regarding the main speaker and multiple sub-speaker groups corresponding to the fixed microphone located near the mobile microphone, and the audio information includes information for determining the main speaker and multiple sub-speaker groups based on inaudible sounds, the transmission time of the inaudible sounds in the main speaker and multiple sub-speaker groups, and the position of the main speaker and multiple sub-speaker groups.

[0020] When the mobile microphone receives multiple inaudible sounds, the positioning unit determines the main speaker and multiple sub-speaker groups emitting the inaudible sounds based on the audio information obtained through the second receiving unit. It then uses the audio information about the determined main speaker and multiple sub-speaker groups, the reception record of the multiple inaudible sounds from the mobile microphone, and the reception record of the inaudible sounds from the fixed microphone obtained through the first receiving unit to perform synchronization. Finally, it uses the audio information about the determined main speaker and multiple sub-speaker groups, and the reception record of the multiple inaudible sounds from the mobile microphone, to calculate the current position of the mobile microphone by measuring the distance between the main speaker, the multiple sub-speaker groups, and the mobile microphone. The position of the fixed microphone is then determined based on the position of the mobile microphone.

[0021] Furthermore, the processor also includes a time calculation unit, which is used to calculate the time difference between the audio information emitted by the main speaker and the audio information emitted by the secondary speaker group based on the received records of the non-audible sound from the main speaker and the non-audible sound from the secondary speaker group received by the mobile microphone.

[0022] Furthermore, the step of "dividing the conference room into multiple areas, calculating the audio arrival time for each area, and obtaining the time difference between the main audio and the secondary audio arriving in each area" specifically includes:

[0023] The meeting room was divided into four equal areas, and a fixed microphone and a mobile microphone were set up in each area.

[0024] The fixed microphone within the area receives the sub-audio information emitted by the sub-speaker in the corresponding area at the designated reception time.

[0025] The fixed microphones within the area acquire the reception time of the main audio information emitted by the main speaker;

[0026] The calculation unit calculates the time difference between the primary and secondary audio received by the fixed microphone in the area, based on the reception time of the secondary audio information and the reception time of the primary audio information.

[0027] Furthermore, the four regions are a first region, a second region, a third region, and a fourth region, wherein the first region is provided with a first-level sub-speaker, the second region is provided with a second-level sub-speaker, the third region is provided with a third-level sub-speaker, and the fourth region is provided with a fourth-level sub-speaker.

[0028] The beneficial effects of adopting the above-mentioned improvement scheme are: by setting up different secondary sound systems in different areas of the exhibition hall, it is easier to manage the secondary sound systems in a hierarchical manner and minimize echo and sound delay.

[0029] Furthermore, the rated time difference is 100ms.

[0030] Most people cannot perceive sound delays below 100 milliseconds. When the delay is between 100 and 300 milliseconds, people can perceive a slight pause in the sound, and when it exceeds 300 milliseconds, the sound delay becomes very noticeable.

[0031] Furthermore, the step of "adjusting the emission time of the sub-audio in different regions according to the time difference, so that the arrival time of the main audio and the sub-audio in each region is less than the rated time difference" specifically includes:

[0032] Determine whether the time difference between the main audio and the secondary audio received by the fixed microphone in the area is greater than 100ms;

[0033] If the time it takes for the sub-audio frequency to reach the fixed pickup is less than T1ms when the main microphone reaches the fixed pickup, the time of the sub-audio frequency emitted by the sub-speaker group in that area is adjusted backward by T1ms, where T1>100.

[0034] If the time it takes for the sub-audio frequency to reach the fixed pickup is greater than the time it takes for the main microphone to reach the fixed pickup by T2ms, then the time of the sub-audio frequency emitted by the sub-speaker group in that area is adjusted forward by T2ms, where T2>100.

[0035] Furthermore, the first fixed decibel is 40 decibels, and the second fixed decibel is 15 decibels.

[0036] The normal decibel level that the human ear can tolerate is between 40 and 60 decibels; when the echo is less than 15 decibels, the human ear can clearly feel the effect of the echo.

[0037] Compared with existing technologies, the beneficial effects of the distributed sound system for large conference rooms provided by this invention are as follows: by setting up a main speaker and a group of secondary speakers, the group of secondary speakers includes a first-level secondary speaker, a second-level secondary speaker, a third-level secondary speaker, and a fourth-level secondary speaker, and by distributing the first-level secondary speaker, the second-level secondary speaker, the third-level secondary speaker, and the fourth-level secondary speaker to different areas, and by executing the steps of controlling the audio coordinated output of the main speaker and the group of secondary speakers through an audio coordination controller, the delay caused by the propagation of the main speaker is minimized to the greatest extent, thereby reducing the latency of the sound. Attached Figure Description

[0038] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 Electrical connection diagram for the sound system of a large conference center;

[0040] Figure 2 A flowchart illustrating the layout method for the sound system in a large conference center;

[0041] The attached diagram lists the components represented by each number as follows:

[0042] 1. Main speaker; 2. Sub-speaker group; 21. First-level sub-speaker; 22. Second-level sub-speaker; 23. Third-level sub-speaker; 24. Fourth-level sub-speaker; 3. Audio coordination controller. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0045] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0046] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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 invention.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0048] like Figure 1 The image shows a first embodiment of a distributed sound system for a large conference room provided by the present invention. In this embodiment, it includes a main speaker 1, a secondary speaker group 2, and an audio coordination controller 3. The main speaker 1 is located at the front of the conference center. The secondary speaker group 2 includes a first-level secondary speaker 21, a second-level secondary speaker 22, and a third-level secondary speaker 23. The first-level secondary speaker 21, the second-level secondary speaker 22, and the third-level secondary speaker 23 are located in different areas of the conference room. The audio coordination controller 3 is electrically connected to the main speaker 1 and the secondary speaker group 2. The audio coordination controller 3 is equipped with a memory, a processor, and microphones. The microphones are placed in different areas of the conference room. The memory stores program instructions. When the processor executes the program instructions, it performs the steps of controlling the audio coordinated output of the main speaker 1 and the secondary speaker group 2.

[0049] Among them, such as Figure 2 As shown, in the above technical solution, the steps for controlling the coordinated audio output of the main speaker and the secondary speaker group specifically include:

[0050] S100: Obtain the coordinates of the sub-speaker group, the current volume, and the reception range. The reception range refers to the reception range above the first fixed decibel.

[0051] S200: Obtain the echo range of the main speaker. The echo range refers to the receiving range above the second fixed decibel.

[0052] S300: Divide the conference room into multiple areas, calculate the audio arrival time for each area, and obtain the time difference between the main audio and the secondary audio arriving in each area;

[0053] S400: Adjusts the emission time of the sub-audio in different regions according to the time difference, so that the arrival time of the main audio and the sub-audio in each region is less than the rated time difference.

[0054] Furthermore, in the above technical solution, the microphone includes a fixed microphone and a mobile microphone.

[0055] Furthermore, in the above technical solution, the processor internally includes a first microphone unit, a second microphone unit, and a positioning unit, wherein...

[0056] The first microphone unit is used to represent the reception record of non-audible sound received by the fixed microphone from the main speaker and multiple sub-speaker groups, and to obtain it by establishing an association with the ID of the fixed microphone, wherein the fixed microphone uses its own timer to obtain the reception time of non-audible sound from the main speaker and multiple sub-speaker groups.

[0057] The second recording unit is used to retrieve audio information from the memory about the main speaker and multiple sub-speaker groups corresponding to the fixed microphone located near the mobile microphone. The audio information includes information for determining the main speaker and multiple sub-speaker groups based on inaudible sounds, the transmission time of the inaudible sounds in the main speaker and multiple sub-speaker groups, and the position of the main speaker and multiple sub-speaker groups.

[0058] The positioning unit, when the mobile microphone receives multiple inaudible sounds, determines the main speaker and multiple sub-speaker groups emitting the multiple inaudible sounds based on the audio information obtained through the second receiving unit. It then uses the audio information about the determined main speaker and multiple sub-speaker groups, the reception record of the multiple inaudible sounds from the mobile microphone, and the reception record of the inaudible sounds from the fixed microphone obtained through the first receiving unit to perform timing. Finally, it uses the audio information about the determined main speaker and multiple sub-speaker groups, and the reception record of the multiple inaudible sounds from the mobile microphone, to calculate the current position of the mobile microphone by measuring the distance between the main speaker, the multiple sub-speaker groups, and the mobile microphone. The position of the fixed microphone is then determined based on the position of the mobile microphone.

[0059] The positioning unit calculates the timer error between the fixed microphone and the mobile microphone based on the received records of non-audible sounds obtained by the first receiving unit from the fixed microphone and the received records of non-audible sounds from the mobile microphone. It then uses the transmission time that takes into account the error and the received records of multiple newly received non-audible sounds in the mobile microphone to calculate the current position of the mobile microphone.

[0060] The second microphone unit includes a request unit located on the mobile microphone and a response unit located on the server. The request unit transmits the ID of the fixed microphone to the server, and the response unit retrieves the audio information corresponding to the ID of the fixed microphone from the storage unit and transmits the audio information to the mobile microphone.

[0061] The request unit receives audio information obtained through the response unit.

[0062] Furthermore, in the above technical solution, the processor also includes a time calculation unit, which is used to calculate the time difference between the audio information emitted by the main speaker and the audio information emitted by the secondary speaker group based on the received records of the non-audible sound from the main speaker and the non-audible sound from the secondary speaker group received by the mobile microphone.

[0063] Furthermore, in the above technical solution, the step of "dividing the conference room into multiple areas, calculating the audio arrival time for each area, and obtaining the time difference between the main audio and the secondary audio arriving in each area" specifically includes:

[0064] The meeting room was divided into four equal areas, and a fixed microphone and a mobile microphone were set up in each area.

[0065] The fixed microphone within the area receives the sub-audio information emitted by the sub-speaker in the corresponding area at the designated reception time.

[0066] The fixed microphones within the area acquire the reception time of the main audio information emitted by the main speaker;

[0067] The calculation unit calculates the time difference between the primary and secondary audio received by the fixed microphone in the area, based on the reception time of the secondary audio information and the reception time of the primary audio information.

[0068] Furthermore, in the above technical solution, the four areas are a first area, a second area, a third area, and a fourth area. The first area is equipped with a first-level sub-speaker 21, the second area is equipped with a second-level sub-speaker 22, the third area is equipped with a third-level sub-speaker 23, and the fourth area is equipped with a fourth-level sub-speaker 24.

[0069] Furthermore, in the above technical solution, the rated time difference is 100ms.

[0070] Furthermore, in the above technical solution, the step of "adjusting the emission time of the sub-audio in different regions according to the time difference, so that the arrival time of the main audio and the sub-audio in each region is less than the rated time difference" specifically includes:

[0071] Determine whether the time difference between the main audio and the secondary audio received by the fixed microphone in the area is greater than 100ms;

[0072] If the time it takes for the sub-audio frequency to reach the fixed pickup is less than T1ms when the main microphone reaches the fixed pickup, the time of the sub-audio frequency emitted by the sub-speaker group in that area is adjusted backward by T1ms, where T1>100.

[0073] If the time it takes for the sub-audio frequency to reach the fixed pickup is greater than the time it takes for the main microphone to reach the fixed pickup by T2ms, then the time of the sub-audio frequency emitted by the sub-speaker group in that area is adjusted forward by T2ms, where T2>100.

[0074] Furthermore, in the above technical solution, the first fixed decibel is 40 decibels and the second fixed decibel is 15 decibels.

[0075] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A distributed sound system for large meeting rooms, characterized in that, The application relates to an audio coordination control system for a conference room, which comprises a main sound box, a secondary sound box group, an audio coordination controller and a sound pickup device, wherein the main sound box is arranged at the front of the conference room, the secondary sound box group comprises a first-level secondary sound box, a second-level secondary sound box and a third-level secondary sound box, the first-level secondary sound box, the second-level secondary sound box and the third-level secondary sound box are arranged in different areas of the conference room, the audio coordination controller is electrically connected with the main sound box and the secondary sound box group, the audio coordination controller is internally provided with a memory and a processor, the memory stores program instructions, and the processor executes the program instructions to execute the step of controlling the audio coordination output of the main sound box and the secondary sound box group, wherein the step of controlling the audio coordination output of the main sound box and the secondary sound box group specifically comprises the following steps: dividing the conference room into multiple areas, calculating the audio arrival time of each area, obtaining the time difference of the main audio and the secondary audio arriving at each area, adjusting the emission time of the secondary audio in different areas according to the time difference, so that the arrival time of the main audio and the secondary audio in each area is less than the rated time difference, the sound pickup device is arranged in different areas of the conference room, the sound pickup device comprises a fixed sound pickup device and a mobile sound pickup device, the fixed sound pickup device and the mobile sound pickup device are arranged in each area, the receiving record of the non-audible sound in the fixed sound pickup device and the receiving record of the non-audible sound in the mobile sound pickup device are obtained, the error of the timer between the fixed sound pickup device and the mobile sound pickup device is calculated, and the current position of the mobile sound pickup device is calculated by using the sending time of the error and the receiving record of the multiple non-audible sounds newly received in the mobile sound pickup device.

2. The distributed sound system for large conference rooms according to claim 1, wherein, The processor is internally provided with a first sound receiving unit, a second sound receiving unit and a positioning unit, wherein, The first sound receiving unit is used for representing the receiving record of the non-audible sound received by the fixed sound pickup device from the main sound box and the multiple secondary sound box groups, and the receiving record is obtained by associating with the ID of the fixed sound pickup device, wherein the fixed sound pickup device uses its own timer to obtain the receiving time of the non-audible sound from the main sound box and the multiple secondary sound box groups; The second sound receiving unit is used for obtaining the audio information of the main sound box and the multiple secondary sound box groups corresponding to the fixed sound pickup device arranged near the mobile sound pickup device from the memory, and the audio information comprises information for determining the main sound box and the multiple secondary sound box groups based on the non-audible sound, the sending time of the non-audible sound in the main sound box and the multiple secondary sound box groups and the positions of the main sound box and the multiple secondary sound box groups; The positioning unit determines the main sound box and the plurality of secondary sound box groups based on the audio information obtained by the second sound receiving unit when the mobile sound pickup receives a plurality of inaudible sounds, and uses the audio information about the determined main sound box and the plurality of secondary sound box groups, the reception record of the plurality of inaudible sounds in the mobile sound pickup, and the reception record of the inaudible sounds in the fixed sound pickup obtained by the first sound receiving unit to synchronize, uses the audio information about the determined main sound box and the plurality of secondary sound box groups, and the reception record of the plurality of inaudible sounds in the mobile sound pickup to calculate the current position of the mobile sound pickup by measuring the distance between the main sound box, the plurality of secondary sound box groups, and the mobile sound pickup, and determines the position of the fixed sound pickup by the position of the mobile sound pickup.

3. A large conference room distributed sound device according to claim 2, wherein, The processor further comprises a calculation unit configured to calculate the time difference between the audio information emitted by the main sound box and the audio information emitted by the secondary sound box group according to the reception record of the inaudible sound of the main sound box and the reception record of the inaudible sound of the secondary sound box group received by the mobile sound pickup.

4. The distributed sound system for large conference rooms of claim 1, wherein, The step of dividing the conference room into a plurality of regions and calculating the audio arrival time of each region to obtain the time difference between the arrival of the main audio and the secondary audio in each region comprises: The conference room is evenly divided into four regions, and a fixed sound pickup and a mobile sound pickup are arranged in each region. The fixed sound pickup in the region obtains the reception time of the received secondary audio information emitted by the secondary sound box in the corresponding region. The fixed sound pickup in the region obtains the reception time of the received main audio information emitted by the main sound box. The calculation unit calculates the reception time difference between the main audio and the secondary audio received by the fixed sound pickup in the region according to the reception time of the secondary audio information and the reception time of the main audio information.

5. The distributed sound system for large conference rooms of claim 1, wherein, The rated time difference is 100 ms.

6. A large conference room distributed sound apparatus according to claim 5, wherein The step of adjusting the emission time of the secondary audio in different regions according to the time difference so that the arrival time of the main audio and the secondary audio in each region is less than the rated time difference comprises: Determine whether the reception time difference between the main audio and the secondary audio received by the fixed sound pickup in the region is greater than 100 ms; If the time when the secondary audio arrives at the fixed sound pickup is less than the time when the main sound arrives at the fixed sound pickup by T1 ms, adjust the time when the secondary audio emitted by the secondary sound box group in the region backward by T1 ms, where T1>100; If the time when the secondary audio arrives at the fixed sound pickup is greater than the time when the main sound arrives at the fixed sound pickup by T2 ms, adjust the time when the secondary audio emitted by the secondary sound box group in the region forward by T2 ms, T2>100.

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