Indoor suspension type active noise reduction device
By designing an indoor suspended active noise cancellation device, which utilizes a high-sensitivity microphone and an omnidirectional speaker unit to generate anti-phase sound waves in real time, the problem of noise interference in student dormitories has been solved, achieving efficient noise reduction and an aesthetically pleasing user experience.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-16
- Publication Date
- 2026-03-06
AI Technical Summary
Existing passive noise reduction methods have limited effectiveness in student dormitories, and active noise reduction devices are not optimized for this environment, failing to effectively reduce noise interference and affecting the quality of study and life.
Design an indoor suspended active noise cancellation device that employs a high-sensitivity microphone unit, a central processing unit, and an omnidirectional speaker unit. It achieves active noise cancellation by real-time acquisition and generation of anti-phase sound waves. Combined with an intelligent power module and a high-strength shell, it can adapt to different environments.
It significantly improves noise reduction and user experience, is highly adaptable, aesthetically pleasing and space-saving, and suitable for various indoor environments.
Smart Images
Figure CN223977690U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of noise reduction device technology, specifically an indoor suspended active noise reduction device. Background Technology
[0002] With the acceleration of urbanization, noise problems faced by students studying and living in dormitories are becoming increasingly serious. Dormitories are usually located in high-density residential areas, where traffic noise and noise from neighbors frequently disturb students' study and rest, reducing their learning efficiency and quality of life.
[0003] Currently, many students use passive noise reduction methods such as earplugs and soundproofing materials to mitigate the impact of noise. However, these methods are often limited in effectiveness, failing to reduce external noise effectively, and may cause prolonged discomfort when using earplugs. Furthermore, soundproofing materials are expensive to install and maintain, inflexible, and difficult to adapt to constantly changing noise environments.
[0004] Active noise cancellation technology has been widely used in aviation, automotive, and other fields, demonstrating excellent noise reduction effects. By acquiring noise in real time and generating anti-phase sound waves, it can effectively cancel external noise and improve environmental comfort. However, existing active noise cancellation devices are mostly used in specific situations and have not yet been optimized for the specific environment of student dormitories. Therefore, developing an active noise cancellation device specifically designed for student dormitories is of significant practical importance. Utility Model Content
[0005] (a) Technical problems to be solved
[0006] The purpose of this invention is to provide an indoor suspended active noise reduction device to solve the problems mentioned in the background art.
[0007] (II) Technical Solution
[0008] To achieve the above objectives, this utility model is implemented through the following technical solution: an indoor suspended active noise cancellation device, comprising a shell, four microphone units, a central processing unit, an octahedral speaker unit, and a power supply module. The central processing unit includes an audio conversion module and a digital signal processing module, which are responsible for converting and analyzing the audio signals collected by the microphones, while generating an anti-phase sound wave signal and emitting an anti-phase sound wave through the octahedral speaker unit to achieve active noise cancellation.
[0009] Preferably, the outer shell is made of high-strength ABS plastic, which has good impact resistance and is designed in a streamlined shape to improve aesthetics and heat dissipation performance.
[0010] Preferably, all four microphone units employ high-sensitivity condenser microphones and windscreens, enabling them to accurately capture sound and effectively reduce external noise interference.
[0011] Preferably, the central processing unit includes an audio conversion module with ADC and DAC and a digital signal processing module using Xilinx's Zynq7000 series XC7Z020-2CLG400I as the core processor to achieve high-fidelity audio signal conversion and real-time data processing.
[0012] Preferably, the octahedral speaker unit adopts an omnidirectional octahedral speaker, which can effectively cover the entire space, thereby effectively improving the active noise cancellation effect.
[0013] Preferably, the power module supports USB plug-in and rechargeable lithium battery power supply, and has a built-in intelligent battery management system to monitor battery status and charging process, ensuring safe and efficient energy use.
[0014] (III) Beneficial Effects
[0015] Compared with the prior art, the beneficial effects of this utility model are:
[0016] This invention significantly improves noise reduction and user experience through advanced digital signal processing algorithms and real-time adaptability; its suspended design not only saves space but is also suitable for various indoor environments, maintaining aesthetics and practicality while also possessing a certain degree of expandability. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the planar structure of this utility model;
[0018] Figure 2 This is a flowchart illustrating the basic principle of this utility model;
[0019] Figure 1 In the middle: 1, 2, 3, and 4 are microphone units; 5 is an octahedral speaker unit; 6 is the central processing unit. Detailed Implementation
[0020] The technical solutions of this utility model will be clearly and completely described below with reference to the structural schematic diagram. The described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0021] Please see Figure 1This utility model provides a technical solution: an indoor suspended active noise reduction device, including a shell, four microphone units (1, 2, 3, 4), a central processing unit (6), an octahedral speaker unit (5) and a power supply module. The central processing unit (6) includes an audio conversion module and a digital signal processing module, which is responsible for converting and analyzing the audio signals collected by the four microphone units (1, 2, 3, 4), generating anti-phase sound waves and transmitting them to the octahedral speaker unit (5) to achieve active noise reduction.
[0022] The housing is primarily used to protect the central processing unit (6) and is designed to prevent damage to internal components from the external environment.
[0023] Four microphone units (1, 2, 3, and 4) are responsible for real-time acquisition of audio signals from the surrounding environment. Their key function is to convert ambient sound into electrical signals. The four microphone units (1, 2, 3, and 4) are placed directly above the dormitory beds and have a certain degree of flexibility, allowing for flexible placement of the microphones according to actual needs. The microphone layout design enables them to capture a wider range of sounds and improve noise reduction.
[0024] The central processing unit (6) is the core of this device, responsible for the processing and analysis of audio signals. This unit includes an audio conversion module (ADC and DAC) and a digital signal processing module. The audio conversion module converts the analog signals collected by the four microphone units (1, 2, 3, 4) into digital signals, using a high-precision ADC to ensure high fidelity of sound quality. The digital signal processing module is responsible for processing these digital audio signals in real time, executing noise reduction algorithms and sound wave analysis to ensure fast response and efficient processing, thereby significantly improving the user's listening experience.
[0025] The function of the octahedral loudspeaker unit (5) is to emit anti-phase sound waves to achieve active noise reduction. Its octahedral loudspeaker unit (5) is designed to achieve unidirectional, multidirectional or omnidirectional sound emission according to actual needs and controlled by the central processing unit (6), which can effectively cover the entire space and improve the noise reduction effect.
[0026] The power module provides a stable power supply for the entire device; it supports both USB power and rechargeable lithium battery power, allowing users to use it flexibly in different environments.
[0027] Specifically, the outer shell is made of high-strength ABS plastic, which not only has good impact resistance but also ensures the equipment is lightweight; the shell is designed in a streamlined shape, providing an aesthetically pleasing appearance and good airflow, which helps with heat dissipation; at the same time, an adjustable mounting bracket is provided at the bottom, allowing users to choose between hanging or fixed installation as needed, to ensure the stability and safety of the equipment.
[0028] Specifically, all four microphone units (1, 2, 3, and 4) are high-sensitivity condenser microphones with excellent frequency response and low noise characteristics, enabling them to accurately capture a variety of sounds. At the same time, the microphone units are equipped with wind shields to reduce wind noise and other external interference, ensuring the clarity of the audio signal.
[0029] Specifically, the digital signal processing module uses Xilinx's Zynq 7000 series XC7Z020-2CLG400I as the core processor, which has abundant hardware resources and peripheral interfaces on both ARM and FPGA, and can well meet the device's requirements for cost, computing power and functionality.
[0030] Specifically, the octahedral loudspeaker (5) uses a high-quality driver unit and combines lightweight materials to improve sound wave transmission efficiency, ensuring good low-frequency response and clear sound quality; the reasonable loudspeaker size design enables it to have high power output capability, making it suitable for noisy environments and meeting user needs.
[0031] Specifically, the power module utilizes both USB power and a rechargeable lithium battery, and also incorporates a built-in intelligent battery management system. This system monitors battery status and the charging process, ensuring safe and efficient energy utilization. The module also features a low-power design, optimizing energy efficiency, extending device lifespan, and ensuring device stability during extended operation.
[0032] Although embodiments of the present invention have been shown and described, those skilled in the art will be able to make various modifications and improvements without departing from the inventive concept, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the claims.
Claims
1. A room-hanging active noise reduction device, comprising a shell, four microphone units (1, 2, 3, 4), a central processing unit (6), an octahedral loudspeaker unit (5) and a power module, characterized in that: The four microphone units (1, 2, 3, 4) use four high-sensitivity microphones; the central processing unit (6) contains an audio conversion module and a digital signal processing module, responsible for audio signal conversion and analysis of the audio signals collected by the microphone units (1, 2, 3, 4), while generating anti-phase sound wave signals; the octahedral loudspeaker unit (5) uses an omnidirectional octahedral loudspeaker to emit the anti-phase sound waves to achieve active noise reduction.
2. The indoor suspension type active noise reduction device according to claim 1, characterized in that: The shell is made of high-strength ABS plastic and designed as a streamlined shape to improve aesthetics and heat dissipation performance. The bottom of the shell is equipped with adjustable mounting brackets to allow users to choose between hanging or fixed installation.
3. The indoor suspended active noise reduction device according to claim 1, characterized in that: The four microphone units (1, 2, 3, 4) use four high-sensitivity microphones, which can collect environmental noise signals in real time and are equipped with windshields to reduce external noise interference.
4. The indoor suspended active noise reduction device according to claim 1, characterized in that: The central processing unit (6) uses Xilinx's Zynq 7000 series XC7Z020-2CLG400I as the core processor of the digital signal processing module, combined with the audio conversion module of ADC and DAC, to achieve high-fidelity audio signal conversion and real-time data processing.
5. The indoor suspended active noise reduction device according to claim 1, characterized in that: The octahedral loudspeaker unit (5) uses an omnidirectional octahedral loudspeaker to effectively cover the entire space and improve the active noise reduction effect.
6. The indoor suspended active noise-cancelling device according to claim 1, characterized in that: The power module supports USB plug-in and rechargeable battery power supply, and is equipped with an intelligent battery management system to monitor the battery status and charging process.