Method for eliminating different frequency band noises in house building

Abstract

The application discloses a method for eliminating different frequency band noises in a house building. The sound elimination method can realize targeted control on different frequency band noises. When high frequency noises are dominant, a small hole depth can be adopted to improve the sound absorption efficiency in unit thickness. When the proportion of middle and low frequency noises is high, the sound absorption peak value is moved to the low frequency direction by increasing the hole depth, so that the overall broadband sound elimination effect is improved. The sound elimination and noise reduction wall structure makes the sound elimination wall body adapt to different application scenes and noise working conditions, and significantly improves the flexibility and engineering applicability of the noise reduction performance.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to a method for eliminating noise of different frequency bands within a building. Background Technology

[0002] Noise sources in modern buildings are complex, including the operating noise of mechanical and electrical equipment such as air conditioners, water pumps, and elevators, noise from water supply, drainage and ventilation ducts, as well as noise from external traffic and construction. These noises cover the entire frequency range from low to high frequencies, and are superimposed from multiple sources with diverse propagation paths, seriously affecting living comfort and human health, and urgently requiring comprehensive and effective noise reduction solutions.

[0003] Current building noise control technologies have significant limitations. The core deficiency is that most methods can only eliminate noise in a certain frequency band and cannot achieve coordinated management across the entire frequency band. In traditional passive noise reduction technologies, porous sound-absorbing materials and perforated panels are mainly effective against mid-to-high frequency noise, with extremely poor sound absorption effects on low-frequency vibration noise. Sound insulation components are limited by the mass law, resulting in insufficient low-frequency sound insulation, while vibration damping and isolation elements can only act on low-frequency structural sound transmission and are ineffective against mid-to-high frequency airborne sound transmission.

[0004] While narrowband active noise cancellation technology can selectively cancel specific noises, it is mostly a single-frequency or narrowband design, capable of handling steady-state noise at specific frequencies such as power frequency, and ineffective against common non-steady-state broadband noise in buildings. Furthermore, it is limited by speaker frequency response and algorithm delay, resulting in high costs for low-frequency control and poor stability for high-frequency control, making it difficult to cover the entire frequency band.

[0005] Existing composite noise reduction solutions have not broken through the bottleneck of frequency band segmentation. Most of them are simple superpositions of different single frequency band technologies without a coordinated control mechanism. They are prone to noise reduction gaps, and they occupy a lot of space, are costly, and are complex to maintain, which cannot meet the high-quality optimization needs of modern building indoor sound environment. Summary of the Invention

[0006] The purpose of this invention is to address the technical deficiencies in the existing technology by providing a method for eliminating noise of different frequency bands within a building.

[0007] The technical solution adopted to achieve the purpose of this invention is: A method for eliminating noise of different frequency bands in a building is disclosed. The method achieves noise reduction through a sound-absorbing and noise-reducing wall structure. The sound-absorbing and noise-reducing wall structure includes a sound wave receiving and automatic adjustment device, a sealing bolt fixing plate that can move back and forth, and sealing bolts. Multiple sound-absorbing holes are opened in the wall, and a sealing bolt is inserted into each sound-absorbing hole. The rear ends of all sealing bolts are fixedly installed on the sealing bolt fixing plate, which is located on the rear side of the wall. The sound wave receiving and automatic adjustment device is fixed to the wall and is used to monitor the noise in the environment and adjust the sealing bolt fixing plate to drive the sealing bolts to move back and forth. The method includes the following steps: Step 1: The sound wave receiving and automatic adjustment device receives the sound. When the noise standard is reached, it analyzes and determines the noise frequency and wavelength. Based on the noise frequency and wavelength, it calculates the depth of the corresponding silencing hole and drives the sealing bolt fixing plate to move the sealing bolt in the silencing hole until the corresponding depth is reached to reduce noise. Step 2: When the sound wave receiving and automatic adjustment device detects that the noise has stopped, it drives the sealing bolt fixing plate to move the sealing bolt until the front end of the sealing bolt is flush with the wall surface.

[0008] In the above technical solution, in step 1, when the noise detected is mainly high-frequency noise, the distance the sealing bolt fixing plate moves backward is small; when the noise detected is mainly mid-to-low frequency noise, the distance the sealing bolt fixing plate moves backward is large.

[0009] In the above technical solution, when the sealing bolt fixing plate moves backward away from the rear side of the wall, a sound-absorbing cavity is formed between the sealing bolt fixing plate and the rear side of the wall.

[0010] In the above technical solution, the acoustic wave receiving and automatic adjustment device is connected to the sealing bolt fixing plate through a linear drive device, driving it to move back and forth.

[0011] In the above technical solution, the driving end of the linear drive device is connected to the sealing bolt fixing plate.

[0012] In the above technical solution, the sound wave receiving and automatic adjustment device and the linear drive device are fixedly installed on the top of the wall.

[0013] In the above technical solution, the linear drive device is an electric telescopic device.

[0014] In the above technical solution, the diameter of the sealing bolt matches the diameter of the silencing hole.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. The noise reduction method of this invention can achieve targeted control of noise in different frequency bands. When high-frequency noise is dominant, a smaller hole depth can be used to improve the sound absorption efficiency per unit thickness; when low-frequency noise accounts for a higher proportion, the sound absorption peak is shifted towards lower frequencies by increasing the hole depth, thereby improving the overall broadband noise reduction effect. This noise-reducing wall structure allows the noise-reducing wall to adapt to different application scenarios and noise conditions, significantly improving the flexibility and engineering applicability of noise reduction performance.

[0016] 2. When the wall is open, the sound-absorbing cavity of the present invention can work synergistically with the front sound-absorbing hole to increase the sound wave reflection and standing wave dissipation effect, so that the sound absorption peak value is further moved to the low frequency direction, thereby significantly improving the ability to reduce mid- and low-frequency noise and widening the overall effective noise reduction frequency band. Attached Figure Description

[0017] Figure 1 This is a front view of the noise reduction wall structure of the present invention.

[0018] Figure 2 This is a side view (closed state) of the noise reduction wall structure of the present invention.

[0019] Figure 3 This is a side view (open state) of the noise reduction wall structure of the present invention.

[0020] Among them, 1: sound wave receiving and automatic adjustment device, 2: sealing bolt fixing plate, 3: sealing bolt, 4: silencing hole, 5: electric telescopic device, 6: wall surface, 7: silencing cavity. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0022] A method for eliminating noise of different frequency bands within a building is disclosed. This method utilizes a sound-absorbing and noise-reducing wall structure to achieve noise reduction. The wall structure includes a sound wave receiving and automatic adjustment device 1, a movable sealing bolt fixing plate 2, and sealing bolts 3. Multiple sound-absorbing holes 4 are formed through the wall, and a sealing bolt 3 is inserted into each sound-absorbing hole 4. The ends of all sealing bolts 3 are fixedly mounted on the sealing bolt fixing plate 2, which is located on the rear side of the wall. The sound wave receiving and automatic adjustment device 1 is fixed to the wall and is used to monitor ambient noise and adjust the forward and backward movement of the sealing bolt fixing plate 2. When the sealing bolt fixing plate 2 moves backward away from the rear side of the wall, a sound-absorbing cavity 7 is formed between the sealing bolt fixing plate 2 and the rear side of the wall. When the front end of the sealing bolt 3 is flush with the wall surface 6, it is in a closed state to prevent dust from falling into the sound-absorbing hole 4. When the sealing bolt 3 moves backward, exposing the sound-absorbing hole 4 within the wall, it is in an open state.

[0023] The sound wave receiving and automatic adjustment device 1 monitors the noise level and frequency band of the environment surrounding the wall, driving the sealing bolt fixing plate 2 to move the sealing bolt 3, thereby adjusting the depth of the silencing hole 4. The hole depth determines the propagation characteristics and main energy dissipation methods of sound waves within the hole, exhibiting a significant selective silencing effect on noise of different frequency bands. When high-frequency noise is detected, the sealing bolt 3 is driven to move backward a short distance. At this point, the hole depth is smaller, the propagation path of the sound wave within the hole is shorter, the air vibration frequency within the hole is high, and the response is sensitive. The effects of viscous friction and heat dissipation are mainly concentrated in the high-frequency and part of the mid-frequency range, thus being more conducive to the absorption of high-frequency noise. When mid-frequency or even low-mid-frequency noise is detected, the sealing bolt 3 is driven to continue moving backward. As the hole depth gradually increases, the propagation distance and residence time of the sound wave within the hole are significantly extended, and the sound absorption effect gradually extends to the mid-frequency and even low-mid-frequency range, allowing longer wavelength noise that was originally difficult to attenuate effectively to achieve more sufficient energy dissipation.

[0024] Furthermore, the acoustic wave receiving and automatic adjustment device 1 is connected to the sealing bolt fixing plate 2 via a linear drive device, driving it to move back and forth. The drive end of the linear drive device is connected to the sealing bolt fixing plate 2.

[0025] Furthermore, the sound wave receiving and automatic adjustment device 1 and the linear drive device are fixedly installed on the top of the wall.

[0026] Furthermore, the linear drive device is an electric telescopic device 5.

[0027] Furthermore, the diameter of the sealing plug 3 matches the diameter of the silencing hole 4.

[0028] The method includes the following steps: Step 1: The sound wave receiving and automatic adjustment device receives the sound. When the noise standard is reached, it analyzes and determines the noise frequency and wavelength. Based on the noise frequency and wavelength, it calculates the depth of the corresponding silencing hole and drives the sealing bolt fixing plate to move the sealing bolt in the silencing hole until the corresponding depth is reached to reduce noise. Step 2: When the sound wave receiving and automatic adjustment device detects that the noise has stopped, it drives the sealing bolt fixing plate to move the sealing bolt until the front end of the sealing bolt is flush with the wall surface.

[0029] The above description is only a preferred embodiment of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for eliminating noise of different frequency bands within a building, characterized in that, This method achieves noise reduction through a noise-absorbing wall structure. The noise-absorbing wall structure includes a sound wave receiving and automatic adjustment device, a sealing bolt fixing plate that can move back and forth, and sealing bolts. Multiple sound-absorbing holes are opened in the wall, and a sealing bolt is inserted into each sound-absorbing hole. The rear ends of all sealing bolts are fixedly installed on the sealing bolt fixing plate, which is located on the rear side of the wall. The sound wave receiving and automatic adjustment device is fixed to the wall and is used to monitor the noise in the environment and adjust the sealing bolt fixing plate to drive the sealing bolts to move back and forth. The method includes the following steps: Step 1: The sound wave receiving and automatic adjustment device receives the sound. When the noise standard is reached, it analyzes and determines the noise frequency and wavelength. Based on the noise frequency and wavelength, it calculates the depth of the corresponding silencing hole and drives the sealing bolt fixing plate to move the sealing bolt in the silencing hole until the corresponding depth is reached to reduce noise. Step 2: When the sound wave receiving and automatic adjustment device detects that the noise has stopped, it drives the sealing bolt fixing plate to move the sealing bolt until the front end of the sealing bolt is flush with the wall surface.

2. The method according to claim 1, characterized in that, When the sealing bolt fixing plate moves backward away from the rear side of the wall, a sound-absorbing cavity is formed between the sealing bolt fixing plate and the rear side of the wall.

3. The method according to claim 1, characterized in that, The acoustic wave receiving and automatic adjustment device is connected to the sealing bolt fixing plate through a linear drive device, driving it to move back and forth.

4. The method according to claim 4, characterized in that, The drive end of the linear drive device is connected to the sealing bolt fixing plate.

5. The method according to claim 4, characterized in that, The sound wave receiving and automatic adjustment device is fixedly installed on the top of the wall.

6. The method according to claim 4, characterized in that, The linear drive unit is fixedly mounted on the top of the wall.

7. The method according to claim 4, characterized in that, The linear drive device is an electric telescopic device.

8. The method according to claim 1, characterized in that, The diameter of the sealing plug matches the diameter of the silencing hole.

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