Real-time acoustic monitoring and feedback system

Abstract

The utility model discloses a real-time acoustic monitoring and feedback system, the system comprises a microphone array, a central controller, a data acquisition terminal and a response assembly, the microphone array transmits acoustic signals to the data acquisition terminal, the data acquisition terminal comprises a sensor interface, a signal amplification circuit, a photoelectric coupler and an analog-to-digital converter, and the signal amplification circuit is connected with the analog-to-digital converter. The microphone array is connected with the sensor interface, the sensor interface is used for receiving an acquisition signal from the microphone array and then sending the acquisition signal to the signal amplification circuit for amplification conditioning, and the photoelectric coupler is used for isolating and transmitting the acquisition signal. The signal output end of the analog-to-digital converter is connected with the central controller, and the central controller adjusts and controls the response assembly based on the conversion result of the analog-to-digital converter.

Description

Technical Field

[0001] The utility model relates to the technical field of acoustic monitoring, in particular to a real-time acoustic monitoring and feedback system. Background Technique

[0002] With the development of modern technology, people have higher and higher requirements for the acoustic environment, especially in places that require high-quality sound reproduction, such as concert halls, recording studios, cinemas, etc. A good acoustic environment can not only enhance the auditory experience, but also reduce noise pollution and protect hearing health. However, in practical applications, the acoustic environment is often affected by various factors, including but not limited to sound source characteristics, spatial structure, material properties, and environmental temperature, etc.

[0003] Traditional means of acoustic environment regulation are relatively passive and usually rely on fixed sound-absorbing materials and sound-insulating structures. Although these methods can improve the acoustic conditions to a certain extent, their effects are limited in a dynamically changing environment. For example, it is impossible to adjust parameters such as reverberation time according to real-time acoustic parameters. In addition, temperature changes will also affect the performance of acoustic materials, thereby affecting the acoustic quality of the entire space. Summary of the Utility Model

[0004] In view of the above-mentioned prior art, the utility model aims to provide a real-time acoustic monitoring and feedback system, mainly solving the technical problems existing in the above background technique.

[0005] To achieve the above object, the technical solution of the embodiment of the utility model is realized as follows:

[0006] A real-time acoustic monitoring and feedback system, the system includes a microphone array, a central controller, a data acquisition terminal, and a response component. The microphone array transmits acoustic signals to the data acquisition terminal. The data acquisition terminal includes a sensor interface, a signal amplification circuit, an optocoupler, and an analog-to-digital converter. The microphone array is connected to the sensor interface. The sensor interface is used to receive the acquisition signals from the microphone array and then send them into the signal amplification circuit for amplification and conditioning. The optocoupler is used to isolate and transmit the acquisition signals, and finally send them into the analog-to-digital converter for digital conversion. The signal output end of the analog-to-digital converter is connected to the central controller. The central controller adjusts and controls the response component based on the conversion result of the analog-to-digital converter.

[0007] Optionally, the response component includes an electric sound-absorbing curtain, and the central controller adjusts the lifting of the electric sound-absorbing curtain.

[0008] Optionally, it further includes a temperature sensor, which is connected to the sensor interface, and the sensor interface is also used to receive the acquisition signal from the temperature sensor.

[0009] Optionally, the signal amplification circuit includes a charge integration circuit, a first filter circuit, a first-stage amplification circuit, a second filter circuit, and a second-stage amplification circuit. The microphone array and the temperature sensor are electrically connected to the charge integration circuit respectively. The charge integration circuit is sequentially electrically connected to the first filter circuit, the first-stage amplification circuit, the second filter circuit, and the second-stage amplification circuit. The second-stage amplification circuit is electrically connected to the optocoupler.

[0010] Optionally, the response component further includes a central air conditioner, and the central controller adjusts the temperature of the central air conditioner to maintain the optimal working state of the acoustic material.

[0011] Optionally, the electric sound-absorbing curtain is hung around the lamp truss in the indoor space.

[0012] The beneficial effects of the present utility model are as follows: By arranging the microphone arrays at various positions inside the theater, obtaining the sound signals inside the theater through the microphone arrays, and transmitting them to the signal amplification circuit through the sensor interface for signal amplification. The optocoupler is used to isolate and transmit the amplified sound signals, and finally send them into the analog-to-digital converter for digital conversion. The signal output end of the analog-to-digital converter is connected to the central controller. The central controller analyzes based on the digital sound signals to obtain key acoustic parameters such as reverberation time and sound pressure level, and adjusts and controls the response component based on the foregoing acoustic parameters, effectively controlling the reverberation time, improving the sound distribution, and reducing echoes, thereby optimizing the acoustic environment. Description of the Drawings

[0013] Figure 1 It is a schematic diagram of the module connection of the real-time acoustic monitoring and feedback system in the embodiment of the present application;

[0014] Figure 2 It is a schematic diagram of the module connection of the data acquisition terminal in the embodiment of the present application;

[0015] Figure 3 It is a schematic diagram of the module connection of the signal amplification circuit in the embodiment of the present application.

[0016] Explanation of the Reference Numerals in the Drawings:

[0017] 1. Microphone array; 2. Central controller; 3. Data acquisition terminal; 301. Sensor interface; 302. Signal amplification circuit; 303. Optocoupler; 304. Analog-to-digital converter; 4. Response component; 5. Charge integration circuit; 6. First filter circuit; 7. First-stage amplification circuit; 8. Second filter circuit; 9. Second-stage amplification circuit; 10. Temperature sensor. Detailed implementation mode

[0018] The technical solution of the present invention will be further elaborated in detail below in conjunction with the accompanying drawings of the specification and specific embodiments. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. In the following description, the expression "some embodiments" is used, which describes a subset of all possible embodiments. However, it should be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments and can be combined with each other without conflict.

[0019] In the following description, a large number of specific details are given to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some well-known technical features are not described.

[0020] It should be understood that the present invention can be implemented in different forms and should not be construed as limited to the embodiments presented herein. On the contrary, providing these embodiments will make the disclosure thorough and complete, and will fully convey the scope of the present invention to those skilled in the art. And the purpose of the terms used herein is only to describe specific embodiments and is not a limitation of the present invention. When used herein, the singular forms "a", "an" and "the" are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms "comprising" and / or "including", when used in this specification, determine the presence of the described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups. When used herein, the term "and / or" includes any and all combinations of the related listed items.

[0021] It should be further noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "inner", "outer", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0022] To thoroughly understand the present utility model, detailed structures will be presented in the following description to illustrate the technical solutions proposed by the present utility model. The optional embodiments of the present utility model are described in detail as follows. However, in addition to these detailed descriptions, the present utility model may also have other implementations.

[0023] Please refer to the attached Figures 1 to 3 The present application provides a real-time acoustic monitoring and feedback system, which includes a microphone array 1, a central controller 2, a data acquisition terminal 3, and a response component 4. The microphone array 1 transmits acoustic signals to the data acquisition terminal 3. The data acquisition terminal 3 includes a sensor interface 301, a signal amplification circuit 302, an optocoupler 303, and an analog-to-digital converter 304. The microphone array 1 is connected to the sensor interface 301. The sensor interface 301 is used to receive the acquisition signals from the microphone array 1 and then send them into the signal amplification circuit 302 for amplification and conditioning. The optocoupler 303 is used to isolate and transmit the acquisition signals, and finally send them into the analog-to-digital converter 304 for digital conversion. The signal output end of the analog-to-digital converter 304 is connected to the central controller 2. The central controller 2 adjusts and controls the response component 4 based on the conversion results of the analog-to-digital converter 304.

[0024] Specifically, a real-time acoustic monitoring and feedback system proposed by the present application is mainly used for acoustic monitoring inside a theater. The microphone array 1 is arranged at various positions inside the theater. The sound signals inside the theater are obtained through the microphone array 1 and transmitted through wires and the like. The sensor interface 301 is used to receive the sound signals from the microphone array 1 and transmit the sound signals to the signal amplification circuit 302 to amplify the sound signals. The optocoupler 303 is used to isolate and transmit the amplified sound signals, and finally send them into the analog-to-digital converter 304 for digital conversion. The signal output end of the analog-to-digital converter 304 is connected to the central controller 2. The central controller 2 analyzes based on the digital sound signals to obtain key acoustic parameters such as reverberation time and sound pressure level, and adjusts and controls the response component 4 based on the foregoing acoustic parameters to effectively control the reverberation time, improve the sound distribution, and reduce echoes, thereby optimizing the acoustic environment.

[0025] It should be noted that the technical means by which the central controller 2 analyzes the sound signal to obtain key acoustic parameters such as reverberation time and sound pressure is common knowledge to those skilled in the art and does not belong to the improvement of this application. Therefore, it will not be specifically described in this embodiment.

[0026] In a possible implementation manner, the response component 4 includes an electric sound-absorbing curtain. The central controller 2 adjusts the lifting of the electric sound-absorbing curtain. Generally, lowering the curtain can increase the sound absorption amount and shorten the reverberation time; raising the curtain reduces the sound absorption amount and prolongs the reverberation time. As an existing well-known product, the specific structure of the electric sound-absorbing curtain will not be specifically described in this embodiment.

[0027] Furthermore, the electric sound-absorbing curtain is suspended around the lamp truss in the indoor space, facilitating adjustment.

[0028] In a possible implementation manner, a temperature sensor 10 is further included. The temperature sensor 10 is connected to the sensor interface 301, and the sensor interface 301 is also used to receive the acquisition signal from the temperature sensor 10.

[0029] Furthermore, the performance of some acoustic materials may be affected by temperature and humidity. Therefore, the response component 4 further includes a central air conditioner. The central controller 2 adjusts the temperature of the central air conditioner according to the temperature data collected by the temperature sensor 10, changes the environmental temperature parameters inside the theater, and maintains the best working state of the acoustic materials.

[0030] In a possible implementation, the signal amplification circuit 302 includes a charge integration circuit 5, a first filter circuit 6, a first-stage amplification circuit 7, a second filter circuit 8, and a second-stage amplification circuit 9. The microphone array 1 and the temperature sensor 10 are electrically connected to the charge integration circuit 5 respectively. The charge integration circuit 5 is sequentially electrically connected to the first filter circuit 6, the first-stage amplification circuit 7, the second filter circuit 8, and the second-stage amplification circuit 9. The second-stage amplification circuit 9 is electrically connected to the optocoupler 303.

[0031] Specifically, the temperature sensor 10 collects temperature signals, and the microphone array 1 collects sound signals and converts the sound signals into electrical signals. The change in the charge of the microphone array 1 is converted into a change in voltage through the charge integration circuit 5, or the electrical signal output by the temperature sensor 10 is then transmitted to the first filter circuit 6 to filter the output signal of the charge integration circuit 5. The first filter circuit 6 can filter out the power frequency interference noise from the power supply. Therefore, the first filter circuit 6 is used to eliminate power frequency interference to prevent the interference signal from being amplified and then filtered, and it is easier to filter out the interference. The filtering result is then transmitted to the first-stage amplifier circuit 7. The voltage first-stage amplifier circuit 7 amplifies the output voltage filtered by the first filter circuit 6, and then transmits the amplified output voltage to the second filter circuit 8. The first filter circuit 6 and the second filter circuit 8 have the same structure and parameters. The second filter circuit filters the output voltage that has passed through the first-stage amplifier circuit 7 again, filters out the interference signal, and then transmits the output voltage to the second-stage amplifier circuit 9 for final amplification.

[0032] It should be noted that the central controller 2, microphone array 1, sensor interface 301, optocoupler 303, analog-to-digital converter 304, etc. used in this application are all existing components in the art, and components / circuits such as the charge integration circuit 5, first filter circuit 6, first-stage amplifier circuit 7, second filter circuit 8, and second-stage amplifier circuit 9 are all existing electronic circuits in the art. Those skilled in the art can obtain and understand the circuit structures of the central controller 2, microphone array 1, sensor interface 301, optocoupler 303, analog-to-digital converter 304 and the circuit connection structures between them according to the existing public technical knowledge and technical materials. They can also understand the circuit compositions of the charge integration circuit 5, first filter circuit 6, first-stage amplifier circuit 7, second filter circuit 8, and second-stage amplifier circuit 9. The embodiments of this application will not elaborate on this specifically, and those skilled in the art can freely select the corresponding models according to needs. No specific limitations are made in this embodiment.

[0033] The above is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present utility model, and all of them should be covered by the protection scope of the present utility model. The protection scope of the present utility model shall be subject to the protection scope of the said claims.

Claims

1. A real-time acoustic monitoring and feedback system, characterized in that: The system includes a microphone array, a central controller, a data acquisition terminal, and a response component. The microphone array transmits sound signals to the data acquisition terminal. The data acquisition terminal includes a sensor interface, a signal amplification circuit, a photoelectric coupler, and an analog-to-digital converter. The microphone array is connected to the sensor interface. The sensor interface is used to receive the acquisition signal from the microphone array, and then send it to the signal amplification circuit for amplification and conditioning. The photoelectric coupler is used to isolate and transmit the acquisition signal, and finally send it to the analog-to-digital converter for digital conversion. The signal output end of the analog-to-digital converter is connected to the central controller. The central controller adjusts and controls the response component based on the conversion result of the analog-to-digital converter.

2. A real-time acoustic monitoring and feedback system according to claim 1, characterized in that: The response component includes an electric sound-absorbing curtain, and the central controller adjusts the raising and lowering of the electric sound-absorbing curtain.

3. A real-time acoustic monitoring and feedback system according to claim 1, characterized in that: It also includes a temperature sensor, which is connected to the sensor interface. The sensor interface is also used to receive a collection signal from the temperature sensor.

4. A real-time acoustic monitoring and feedback system according to claim 3, characterized in that: The signal amplification circuit includes a charge integration circuit, a first filtering circuit, a first-level amplification circuit, a second filtering circuit and a second-level amplification circuit. The microphone array and the temperature sensor are electrically connected to the charge integration circuit respectively. The charge integration circuit is electrically connected to the first filtering circuit, the first-level amplification circuit, the second filtering circuit and the second-level amplification circuit in sequence. The second-level amplification circuit is electrically connected to the photoelectric coupler.

5. A real-time acoustic monitoring and feedback system according to claim 4, characterized in that: The response component also includes a central air conditioner, and the central controller adjusts the temperature of the central air conditioner to maintain the best working state of the acoustic material.

6. A real-time acoustic monitoring and feedback system according to claim 2, characterized in that: The electric sound-absorbing curtain is hung around the lamp stand truss in the indoor space.

Images