Mute room with active noise reduction function

Abstract

The utility model provides a silence room with an active noise reduction function. The silence room comprises a silence room body and an active noise reduction assembly. The active noise reduction assembly is arranged in the mute room and used for collecting environment sound waves outside the mute room, determining target sound waves according to the environment sound waves and making sound according to the target sound waves, and the target sound waves are sound waves with the sound wave intensity smaller than the preset intensity after being overlapped with the environment sound waves; the controller controls the loudspeaker to emit the target sound wave, that is, after the loudspeaker emits the target sound wave, the target sound wave can be neutralized and counteracted with the sound wave in the environment outside the silence chamber, so that the intensity of the interior of the silence chamber is reduced to be below the preset intensity after noise reduction is carried out on the interior of the silence chamber through the active noise reduction assembly provided by the embodiment of the invention. According to the mute room with the active noise reduction function, sound waves sensed by a user in the mute room in the area where the ears are located are low-strength sound waves, and compared with an existing mute room adopting a sound insulation plate for passive sound insulation, the mute room with the active noise reduction function is better in mute effect.

Description

TECHNICAL FIELD

[0001] The utility model relates to active noise reduction technical field, specifically a mute room with active noise reduction function. BACKGROUND

[0002] With the rapid development of our country's economy, people's comfort requirement for living environment is higher and higher, among them, low noise environment is one, people have low noise demand in office, home, traffic tool.

[0003] In some environment noise big working place, for example, power station, transformer substation and boiler room etc., need to rest in a noise relatively smaller space, at this moment, the mute room is the first choice, can rest in the mute room or handle some need language communication work, such as making a phone call, currently, such as patent number for: "CN201721759374.7 " the patent discloses a mute room, which comprises: mute room includes: front side plate, rear side plate, left side plate, right side plate, bottom plate, top plate, loudspeaker, front side plate, rear side plate, left side plate, right side plate, bottom plate, top plate limited space forms the test space of mute room.The mute room of the utility model can set up the sound absorption board in different ways according to the different modes of each side plate and top plate and bottom plate, so that the mute room has better mute effect, and the sound absorption board can be adjusted in position and direction as required, thereby being suitable for mute test of most workpieces.

[0004] However, when the ambient noise is too large, such as in the factory, boiler room, the passive noise reduction measures of the existing mute room have poor effect, which cannot meet the actual use requirement of the user. SUMMARY

[0005] The utility model aims at providing a mute room with active noise reduction function to solve the poor mute effect of the existing mute room using passive noise reduction measures in the background art.

[0006] To achieve the above object, the utility model provides the following technical scheme:

[0007] A mute room with active noise reduction function, comprising: a mute room, an active noise reduction assembly,

[0008] The active noise reduction assembly is arranged in the mute room, and the active noise reduction assembly is used for collecting ambient sound waves outside the mute room, determining target sound waves according to the ambient sound waves, and emitting sound according to the target sound waves, wherein the target sound waves are sound waves with an intensity less than a preset intensity after superposition with the ambient sound waves.

[0009] Optionally, the active noise reduction assembly comprises a sound collecting device, a controller and a sound generating device.

[0010] The sound generating device and the controller are arranged in the soundproof room; the sound collecting device is arranged outside the soundproof room; the sound collecting device is connected with the controller, and the controller is connected with the sound generating device;

[0011] The sound collecting device is used for collecting environmental sound waves outside the soundproof room; the controller is used for determining target sound waves according to the environmental sound waves and for controlling the sound generating device to generate sound according to the target sound waves.

[0012] Optionally, the sound generating device comprises a shell and a loudspeaker; the shell is open-shaped, and the loudspeaker is arranged in the shell; and the shell is arranged in the soundproof room.

[0013] Optionally, the sound generating device is arranged on the side wall of the soundproof room, and the sound generating device faces the center of the soundproof room.

[0014] Optionally, the controller is arranged on the top of the soundproof room or in the table plate arranged in the soundproof room.

[0015] Optionally, a plurality of sound collecting devices are arranged around the outer wall of the soundproof room.

[0016] Optionally, the active noise reduction assembly comprises a plurality of sound collecting devices.

[0017] Each sound collecting device is in communication connection with the controller.

[0018] The controller is specifically used for acquiring each environmental sound wave collected by each sound collecting device and determining target sound waves according to each environmental sound wave.

[0019] Compared with the prior art, the active noise reduction assembly has the following beneficial effects:

[0020] The embodiment of the present application provides a soundproof room with an active noise reduction function, which comprises a soundproof room and an active noise reduction assembly; the active noise reduction assembly is arranged in the soundproof room, the active noise reduction assembly is used for collecting environmental sound waves outside the soundproof room, determining target sound waves according to the environmental sound waves, and sounding according to the target sound waves, wherein the target sound waves are sound waves with an intensity less than a preset intensity after superposition of the environmental sound waves, then a controller controls a loudspeaker to emit the target sound waves, that is, the loudspeaker emits the target sound waves, and then the target sound waves can be neutralized and cancelled in the sound waves in the environment outside the soundproof room, so that the intensity of the sound waves in the soundproof room is reduced to below the preset intensity after noise reduction by the active noise reduction assembly. In this way, a user in the soundproof room feels the sound waves with a smaller intensity in the area where the user's ears are located, compared with the soundproof room with a passive sound insulation board, the soundproof room with the active noise reduction function has a better soundproof effect, in addition, the soundproof room can effectively reduce damage to the user's hearing and improve the user's comfort and user experience. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a front view structural schematic diagram of the soundproof room with the active noise reduction function.

[0022] Figure 2 It is a perspective structural schematic diagram of the soundproof room with the active noise reduction function.

[0023] Figure 3 It is another front view structural schematic diagram of the soundproof room with the active noise reduction function.

[0024] Figure 4 It is another perspective structural schematic diagram of the soundproof room with the active noise reduction function.

[0025] In the figure: 1. Controller; 2. Sound generating device; 3. Sound collecting device; 4. Shell; 5. Soundproof room; 6. Loudspeaker. DETAILED DESCRIPTION

[0026] The technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0027] In addition, elements in the present utility model are referred to as "fixed to" or "disposed on" another element, which can be directly on another element or can have a central element. When an element is considered "connected" to another element, it can be directly connected to another element or can have a central element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not the only embodiment.

[0028] BACKGROUND

[0029] At present, in some noisy working environments, such as power stations, transformer substations and boiler rooms, etc., when resting, it is necessary to go to a space with relatively small noise, at which time the soundproof room 5 is the first choice, and in the soundproof room 5, it can be rested or handled some work that needs language communication. When the ambient noise is too large, the passive noise reduction measure of the soundproof room 5 is not obvious, and active noise reduction measures need to be added to better reduce noise.

[0030] Please refer to Figures 1-3 , the utility model discloses an example, a kind of soundproof room 5 with active noise reduction function, comprising: soundproof room 5, active noise reduction component;The active noise reduction component is arranged in the soundproof room 5, and the active noise reduction component is used to collect the environmental sound wave outside the soundproof room 5, determines target sound wave according to the environmental sound wave, and according to the target sound wave, wherein the target sound wave is: the intensity of the sound wave obtained after superposition with the environmental sound wave is less than the preset intensity.

[0031] In the embodiment, the above-mentioned active noise reduction component can include a sound collecting device 3, a controller 1 and a sound generating device 2;The sound generating device 2 and the controller 1 are arranged in the soundproof room 5;The sound collecting device 3 is arranged outside the soundproof room 5;The sound collecting device 3 is connected with the controller 1, and the controller 1 is connected with the sound generating device 2;The sound collecting device 3 is used to collect the environmental sound wave outside the soundproof room 5;The controller 1 is used to determine the target sound wave according to the environmental sound wave, and is used to control the sound generating device 2 to sound according to the target sound wave.

[0032] Specifically, the above-mentioned sound collecting device 3 can be a microphone, or other device for collecting sound.

[0033] The mute room 5 with the active noise reduction function can comprise one sound collecting device 3, or at least two sound collecting devices 3, can comprise one sound generating device 2, or at least two sound generating devices 2, and the number of the sound generating device 2 and the sound collecting device 3 is not specifically limited in the embodiment of the application. When the number of the sound collecting device 3 is larger, the range of the collected environmental sound waves is larger, so that the target sound wave determined by the controller 1 is more accurate, so that the sound wave intensity obtained after the sound wave emitted by the sound generating device 2 is superimposed on the sound wave in the environment outside the mute room 5 is smaller, and the sound wave perceived by the user is smaller. When the number of the sound generating device 2 is larger, the sound wave intensity in each direction outside the mute room 5 can be uniformly reduced, further reducing the noise perceived by the user, so as to improve the user experience.

[0034] The sound generating device 2 can be directly installed on the inner wall of the mute room 5, or can be installed in the interior of the mute room 5 through a support, so as to facilitate the adjustment of the position of the sound generating device 2 in the mute room 5. For example, the installation height of the sound generating device 2 can be determined according to the standing posture or sitting posture of the user suitable for the function of the mute room 5; the orientations of the sound generating device 2 are all towards the central position in the mute room 5, so that the noise reduction effect is better. In the embodiment of the application, the type, model and other properties of the sound generating device 2 are not specifically limited, and the sound generating device 2 can be a single loudspeaker 6 or a loudspeaker 6 with an acoustic cavity.

[0035] The controller 1 can be installed at any position in the mute room 5. As a preferred embodiment, the controller 1 can be installed at a position that does not affect the internal space of the mute room 5, for example, the controller 1 can be embedded into the table board in the mute room 5, or can be fixed to the inner top of the mute room 5, etc. The power supply mode of the controller 1 can be powered by the power supply of the air conditioning equipment, or can be powered by a built-in lithium battery, or can be powered by a solar cell module, and the power supply mode of the controller 1 is not specifically limited in the embodiment of the application.

[0036] The sound collecting device 3 and the sound generating device 2 are both arranged on the mute room 5, the sound collecting device 3 is arranged on the outside of the mute room 5, and the sound generating device 2 is arranged in the interior of the mute room 5. It should be noted that the sound collecting device 3 needs to collect the environmental sound waves, i.e. the environmental noise, outside the mute room 5 first, and then uses the sound generating device 2 to emit sound waves to offset the environmental noise.

[0037] The sound collecting device 3 can be connected with the controller 1 through wireless signals or through communication lines, and the controller 1 can be connected with the sound generating device through wireless signals or through communication lines. In order to reduce the complexity of the equipment, the sound collecting device 3 and the controller 1, and the controller 1 and the sound generating device 2 can be connected by using wireless signals.

[0038] The controller 1 can be a microprocessor or other device with control function. The controller 1 can be purchased from the market or obtained by writing a program corresponding to the steps performed by the controller 1 into a microcomputer without control program. When the controller 1 is obtained by writing a program corresponding to the steps performed by the controller 1, the controller 1 can be more suitable for the active noise reduction assembly, and the control effect of the controller 1 can be better, and the intensity of the noise heard by people can be more flexibly controlled.

[0039] It should be noted that the controller 1 determines the target sound wave by collecting the sound wave through the sound collecting device 3, and controls the sound generating device 2 to sound according to the target sound wave to offset the noise outside the anechoic chamber 5. The control process can be implemented according to the following steps:

[0040] Step 1: The sound wave collected by the sound collecting device 3 is converted into an analog noise signal through a microphone, and the analog noise signal is converted into a digital noise signal through an analog-digital conversion module;

[0041] Step 2: The digital noise signal is processed by an adaptive filter module to generate a secondary digital sound source signal;

[0042] Step 3: The secondary digital sound source signal is processed by a signal gain module to generate a secondary amplified digital sound source signal;

[0043] Step 4: The secondary amplified digital sound source signal is converted into a secondary amplified analog sound source signal through a digital-analog conversion module, and a sound wave signal opposite in phase to the secondary amplified analog sound source signal is obtained, which is used as the target sound wave.

[0044] Alternatively, the skilled in the art can use the sound collecting device 3 to collect multiple sound waves by single variable control method, take a single sound wave as a fixed variable, obtain the target sound wave intensity which can offset the noise outside the soundproof room 5 at this time, until the target sound wave intensity corresponding to each of the multiple sound waves is obtained, and a data model between the sound wave intensity and the target sound wave intensity is established, and the data model is written into the controller 1 to realize the above control process. In the test process, the sound collecting device 3 for testing can be arranged in the soundproof room 5, and the noise intensity collected by the sound collecting device 3 for testing is used as the judgment of the effect of the sound wave emitted by the loudspeaker 6 according to the target sound wave on the sound wave collected by the sound collecting device 3. In the embodiment of the application, the preset intensity is 44 decibels, and humans experience well in an environment with a noise intensity of less than 44 decibels. Of course, the preset intensity can be any value below 44 decibels. It should be noted that the embodiment of the application is to protect the noise reduction assembly and the implementation principle of the noise reduction assembly. In theory, the preset intensity can be any value to realize the scheme of controlling noise according to the target intensity of the application. However, in actual situations, humans will have a better experience when the noise intensity is less than 44 decibels.

[0045] Further, in order to improve the sound emitting effect of the loudspeaker 6, an acoustic cavity can be configured for the loudspeaker 6 to enhance the sound emitting effect of the loudspeaker 6. The sound producing device 2 comprises: a shell 4, a loudspeaker 6; the shell 4 is open, and the loudspeaker 6 is installed in the shell 4; the shell 4 is installed in the soundproof room 5.

[0046] Further, the sound producing device 2 is arranged on the side wall of the soundproof room 5, and the sound producing device 2 faces the center of the soundproof room 5. The controller 1 is installed on the top of the soundproof room 5 or in the table plate in the soundproof room 5. A plurality of sound collecting devices 3 are arranged around the outer side wall of the soundproof room 5. The active noise reduction assembly comprises a plurality of sound collecting devices 3; each sound collecting device 3 is in communication connection with the controller 1; the controller 1 is specifically used for acquiring each environment sound wave collected by each sound collecting device 3, and determining a target sound wave according to each environment sound wave.

[0047] In this embodiment, the sound collecting device 3 is arranged on the outer side wall of the soundproof room 5, and the sound collecting device 3 is arranged on the inner side wall of the soundproof room 5. Figures 1-2As shown in the figure, the controller 1, the sound generating device 2 and the sound collecting device 3 are installed on the soundproof room 5. The controller 1 is installed in the table board of the soundproof room 5, and can also be installed on the top of the soundproof room 5. The sound generating device 2 is installed on the four corners of the soundproof room 5, and the sound generating device 2 faces the center of the soundproof room 5. The installation height of the sound generating device 2 is determined according to the standing posture or sitting posture of the user suitable for the function setting of the soundproof room 5. Generally, one sound generating device 2 is placed on each of the four corners, and the total number is four. The sound collecting device 3 is placed outside the soundproof room 5. One sound collecting device 3 is placed on each of the eight corners of the soundproof room 5. The sound collecting device 3 can be increased or decreased according to actual needs.

[0048] In this embodiment, referring to Figures 3-4 As shown in the figure, the controller 1, the sound generating device 2 and the sound collecting device 3 are installed on the soundproof room 5. The controller 1 is installed in the table board of the soundproof room 5, and can also be installed on the top of the soundproof room 5. The sound generating device 2 is installed on the four corners of the soundproof room 5, and the sound generating device 2 faces the center of the soundproof room 5. The installation height of the sound generating device 2 is determined according to the standing posture or sitting posture of the user suitable for the function setting of the soundproof room 5. Generally, one sound generating device 2 is placed on each of the four corners, and the total number is four. The sound collecting device 3 is placed outside the soundproof room 5. One sound collecting device 3 is placed on each of the eight corners of the soundproof room 5. The sound collecting device 3 can be increased or decreased according to actual needs.

[0049] It is apparent for those skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Accordingly, the embodiments should be considered as exemplary only, and not limiting, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended to embrace all changes and modifications that fall within the meaning and range of equivalents of the claims. Any reference signs in the claims should not be construed as limiting the claims to which they belong.

[0050] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the specification is described in this way only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A soundproof room (5) with active noise reduction function, characterized in that, include: Silenced room (5), active noise reduction components; The active noise reduction component is installed in the quiet room (5). The active noise reduction component is used to collect ambient sound waves outside the quiet room (5), determine the target sound wave according to the ambient sound waves, and emit sound according to the target sound wave. The target sound wave is: a sound wave whose intensity is less than a preset intensity after being superimposed with the ambient sound wave. The active noise reduction component includes: a sound acquisition device (3), a controller (1), and a sound generation device (2); The sound generating device (2) and the controller (1) are both located inside the soundproof room (5); the sound acquisition device (3) is located outside the soundproof room (5); the sound acquisition device (3) is connected to the controller (1), and the controller (1) is connected to the sound generating device (2); The sound acquisition device (3) is used to acquire ambient sound waves outside the soundproof room (5); the controller (1) is used to determine the target sound wave based on the ambient sound waves, and to control the sound generating device (2) to emit sound according to the target sound wave.

2. The soundproof room (5) with active noise reduction function according to claim 1, characterized in that, The sound generating device (2) includes: a housing (4) and a speaker (6); the housing (4) is open, and the speaker (6) is installed inside the housing (4); the housing (4) is installed inside the soundproof room (5).

3. The soundproof room (5) with active noise reduction function according to claim 1, characterized in that, The sound generating device (2) is disposed on the side wall of the soundproof room (5) and the sound generating device (2) faces the center of the soundproof room (5).

4. The soundproof room (5) with active noise reduction function according to claim 1, characterized in that, The controller (1) is installed on the top of the soundproof room (5) or inside the table in the soundproof room (5).

5. The soundproof room (5) with active noise reduction function according to claim 1, characterized in that, It includes multiple sound acquisition devices (3), which are evenly arranged around the outer wall of the soundproof room (5).

6. The soundproof room (5) with active noise reduction function according to claim 1, characterized in that, The active noise reduction component includes multiple sound acquisition devices (3); Each of the aforementioned sound acquisition devices (3) is communicatively connected to the controller (1); The controller (1) is specifically used to acquire each ambient sound wave acquired by each of the sound acquisition devices (3), and to determine the target sound wave based on each of the ambient sound waves.

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