CN111862929A - Noise reduction device and noise reduction method - Google Patents
Noise reduction device and noise reduction method Download PDFInfo
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- CN111862929A CN111862929A CN202010936435.2A CN202010936435A CN111862929A CN 111862929 A CN111862929 A CN 111862929A CN 202010936435 A CN202010936435 A CN 202010936435A CN 111862929 A CN111862929 A CN 111862929A
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1785—Methods, e.g. algorithms; Devices
- G10K11/17857—Geometric disposition, e.g. placement of microphones
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1785—Methods, e.g. algorithms; Devices
- G10K11/17861—Methods, e.g. algorithms; Devices using additional means for damping sound, e.g. using sound absorbing panels
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Abstract
The invention provides a noise reduction device and a noise reduction method, wherein the noise reduction device comprises: the device comprises a machine body, wherein an installation cavity is arranged in the machine body; the sound generating device is at least partially arranged in the mounting cavity and used for generating first sound waves; the sound collecting device connecting part is arranged on the machine body, is used for being electrically connected with the sound collecting device and is used for transmitting second sound waves collected by the sound collecting device so as to enable at least part of the first sound waves and at least part of the second sound waves to be mutually offset; the control module is installed in the installation cavity, and the sound generating device and the sound collecting device connecting portion are connected with the control module so as to solve the problem that the universality of the noise reduction device in the prior art is low.
Description
Technical Field
The invention relates to the field of active noise reduction, in particular to a noise reduction device and a noise reduction method.
Background
At present, household appliances such as range hoods, air conditioner external units and the like can generate a large amount of noises in the working process, the experience effect of users is seriously influenced, the noises comprise motor noises, compressor noises, pneumatic noises and the like, and main frequency components are concentrated in a low frequency band.
In the prior art, sound absorption materials are generally adopted to achieve the purpose of noise reduction, but the methods only have obvious effect on high-frequency sound waves in the sound waves; the purpose of reducing noise by an active noise reduction method is also disclosed in the prior art, but all the active noise reduction devices are installed in a distributed manner, control strategies need to be formulated separately for different reference scenes, integration of the noise reduction devices cannot be realized, and the universality is low.
Disclosure of Invention
The invention mainly aims to provide a noise reduction device and a noise reduction method, and aims to solve the problem that the noise reduction device in the prior art is low in universality.
In order to achieve the above object, according to one aspect of the present invention, there is provided a noise reduction device comprising: the device comprises a machine body, wherein an installation cavity is arranged in the machine body; the sound generating device is at least partially arranged in the mounting cavity and used for generating first sound waves; the sound collecting device connecting part is arranged on the machine body, is used for being electrically connected with the sound collecting device and is used for transmitting a second sound wave collected by the sound collecting device and feeding back residual sound wave information obtained by mutually offsetting the first sound wave and the original sound wave to the control module; and the control module is installed in the installation cavity, and the sound generating device and the sound collecting device connecting part are connected with the control module.
Furthermore, the sound collecting device connecting parts are multiple, and the multiple sound collecting device connecting parts are arranged on the machine body at intervals.
Further, the noise reduction device further includes: the first function conversion key is arranged on the machine body and connected with the sound collecting device connecting part so as to control the working state of the sound collecting device connecting part through the first function conversion key.
Furthermore, the first function conversion keys are multiple, and the multiple first function conversion keys and the multiple sound collecting device connecting parts are arranged in one-to-one correspondence.
Further, the noise reduction device further includes: and the second function conversion key is arranged on the machine body and is connected with the sound generating device so as to control the working state of the sound generating device by operating the second function conversion key.
Further, the noise reduction device further includes: the sound absorption component is installed in the installation cavity, at least part of the sound absorption component is attached to the inner wall of the installation cavity, and the sound absorption component is used for absorbing at least part of high-frequency sound waves in the first sound waves.
Further, the body includes: the apron sets up in the top of installation cavity, and sound generating mechanism's at least part is installed on the apron, and sound generating mechanism's sound production cavity is towards the outside of installation cavity.
Further, the sound generating device is a speaker.
Further, the installation cavity comprises a first installation cavity and a second installation cavity which are adjacently arranged, the control module is installed in the first installation cavity, and at least part of the sound generating device is installed in the second installation cavity.
Further, the noise reduction device further includes: the baffle sets up in the installation cavity, and the side of baffle and the lateral wall laminating of installation cavity to divide into first installation cavity and second installation cavity with the installation cavity through the baffle.
According to another aspect of the present invention, there is provided an active noise reduction method, which is applied to the above noise reduction apparatus, and the noise reduction method includes: s10: installing a noise reduction device in a device to be noise reduced; s20: determining the setting position of the sound collecting device according to different installation scenes; s30: after the noise reduction device is started, sound field identification is carried out on the working environment; s40: and entering an active noise reduction mode, and controlling the sound generating device to generate a first sound wave.
By applying the technical scheme, the noise reduction device comprises a machine body, a sound production device, a sound collection device connecting part and a control module, wherein an installation cavity is arranged in the machine body, and at least part of the sound production device is arranged in the installation cavity and is used for producing a first sound wave; the sound collecting device connecting part is arranged on the machine body, is used for being electrically connected with the sound collecting device and used for transmitting a second sound wave collected by the sound collecting device, and feeds back residual sound wave information obtained by mutually offsetting the first sound wave and the original sound wave to the control module; the control module is installed in the installation cavity, and the sound generating device and the sound collecting device connecting portion are connected with the control module. The noise reduction device can be integrally arranged, when the noise reduction device is arranged, all parts of the noise reduction device are not required to be respectively arranged, the noise collection device is only required to be connected to the noise collection device connecting portion through a wire, the mounting space is reduced, the noise reduction device can be integrally mounted in different equipment to be reduced, and the applicability of the noise reduction device is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 shows a schematic structural view of an embodiment of a noise reducing arrangement according to the invention;
FIG. 2 shows a top view of a noise reducer according to the present invention;
FIG. 3 shows a cross-sectional view of the A-A side of the noise reducer according to FIG. 2;
FIG. 4 shows a flow chart of an active noise reduction method according to the present invention;
FIG. 5 shows a control diagram of an active noise reduction method according to the present invention; and
fig. 6 shows a schematic diagram of active noise reduction according to the present invention.
Wherein the figures include the following reference numerals:
1. a body; 10. a mounting cavity; 2. a sound producing device; 3. a sound collection device connection section; 4. a first function conversion key; 5. a second function conversion key; 6. a sound absorbing member; 11. a cover plate; 101. a first mounting cavity; 102. a second mounting cavity; 7. a partition plate; 8. a communication interface; 9. a power interface; 12. and a control module.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The present invention provides a noise reduction device, please refer to fig. 1 to 3, including: the device comprises a machine body 1, wherein a mounting cavity 10 is arranged in the machine body 1; the sound generating device 2 is at least partially arranged in the mounting cavity 10 and used for generating first sound waves; the sound collecting device connecting part 3 is arranged on the machine body 1, and the sound collecting device connecting part 3 is electrically connected with the sound collecting device and used for transmitting second sound waves collected by the sound collecting device so as to enable at least part of the first sound waves and at least part of the second sound waves to be mutually offset; and the control module 12 is installed in the installation cavity 10, and the sound generating device 2 and the sound collecting device connecting part 3 are both connected with the control module 12.
The noise reduction device comprises a machine body 1, a sound production device 2, a sound collection device connecting part 3 and a control module 12, wherein a mounting cavity 10 is arranged in the machine body 1, at least part of the sound production device 2 is arranged in the mounting cavity 10 and used for producing first sound waves, and the first sound waves are used for offsetting original sound waves corresponding to controlled noise; the sound collecting device connecting part 3 is arranged on the machine body 1, and the sound collecting device connecting part 3 is used for being electrically connected with a sound collecting device and transmitting a second sound wave collected by the sound collecting device so as to enable at least part of the first sound wave and at least part of the second sound wave to be mutually offset, wherein the second sound wave comprises an original sound wave of controlled noise and sound wave information obtained after the first sound wave and the original sound wave are mutually offset; the control module 12 is installed in the installation cavity 10, and the sound generating device 2 and the sound collecting device connecting part 3 are connected with the control module. The noise reduction device can be integrally arranged, when the noise reduction device is arranged, all parts of the noise reduction device are not required to be respectively arranged, the noise collection device is only required to be connected to the noise collection device connecting portion 3 through a wire, the installation space is reduced, the noise reduction device can be integrally installed in different equipment to be reduced, and the applicability of the noise reduction device is improved.
In order to adapt the noise reduction device to different environments to be noise reduced, the number of the sound collecting device connecting parts 3 is multiple, and the plurality of sound collecting device connecting parts 3 are arranged on the machine body 1 at intervals. In this way, a plurality of sound collecting devices can be connected simultaneously, the sound collecting devices are preferably microphones, and part of application scenes can also be acceleration sensors. When the equipment to be denoised is replaced, the program of the sound collecting device does not need to be independently programmed according to the new equipment to be denoised, and the plurality of sound collecting device connecting parts 3 can be freely configured according to the actual situation.
In specific implementation, the noise reduction apparatus further includes: and the first function conversion key 4 is arranged on the machine body 1 and is connected with the sound collecting device connecting part 3 so as to control the working state of the sound collecting device connecting part 3 through the first function conversion key 4. By operating the first function switching key 4, when the noise reduction device is replaced with a device to be noise reduced, the function of the sound collection device is selected.
In the embodiment of the present invention, the number of the first function switching keys 4 is plural, and the plural first function switching keys 4 are disposed in one-to-one correspondence with the plural sound collecting device connecting portions 3. The function of the microphone connected with the corresponding sound collecting device connecting part 3 can be selected through the first function conversion key 4.
In the specific implementation process, the noise reduction device further comprises: and the second function conversion key 5 is arranged on the machine body 1, and the second function conversion key 5 is connected with the sound generating device 2 so as to control the working state of the sound generating device 2 by operating the second function conversion key 5. In the practical application process, when the noise reduction device is installed in the equipment to be noise reduced for the first time or the sound field where the noise reduction device is located changes, sound field identification needs to be carried out on noise in the equipment to be noise reduced to determine sound wave information of the noise, if the sound field environment where the noise reduction device is located does not change, active noise reduction is directly carried out, and two functions of sound field identification and active noise reduction are selected by arranging the second function conversion key 5.
Because the main sound wave in the second sound wave of adopting the collection of sound device is the low frequency sound wave, in order to optimize noise reduction effect, reduces the high frequency sound wave that sound generating mechanism 2 produced, noise reduction device still includes: the sound absorption component 6 is installed in the installation cavity 10, at least part of the sound absorption component 6 is attached to the inner wall of the installation cavity 10, and the sound absorption component 6 is used for absorbing at least part of high-frequency sound waves in the first sound waves. The sound absorption member 6 may be a sound absorption material such as a sound absorption sponge, and mainly absorbs at least a part of the high frequency sound waves in the first sound waves, so that the low frequency sound waves in the first sound waves and the low frequency sound waves in the second sound waves cancel each other out, and interference introduced by the high frequency part is reduced.
In the embodiment provided by the present invention, the body 1 includes: the cover plate 11 is arranged above the mounting cavity 10, at least part of the sound generating device 2 is arranged on the cover plate 11, and the sound generating cavity of the sound generating device 2 faces the outer side of the mounting cavity 10. Preferably, the sound generating device 2 is a speaker. Wherein, organism 1 still includes bottom plate and a plurality of curb plate, and a plurality of curb plates connect gradually along the circumference of bottom plate, and apron 11 sets up with the bottom plate relatively to constitute installation cavity 10 between bottom plate, a plurality of curb plates and apron 11, all be provided with hollow structure in bottom plate, a plurality of curb plates and the apron 11, sound absorbing component 6 installs in hollow structure, in order to improve sound absorbing component 6's sound absorption effect.
In order to avoid the influence of the sound wave generated by the sound generating device 2 on the control module, the installation cavity 10 includes a first installation cavity 101 and a second installation cavity 102 which are adjacently arranged, the control module is installed in the first installation cavity 101, and at least part of the sound generating device 2 is installed in the second installation cavity 102.
Specifically, the noise reduction device further includes: baffle 7, the setting is in installation cavity 10, and the side of baffle 7 and the lateral wall laminating of installation cavity 10 to divide installation cavity 10 into first installation cavity 101 and second installation cavity 102 through baffle 7. The partition board 7 is a hollow board body, and sound absorption materials are installed in the partition board 7.
When the noise reduction device is specifically implemented, the machine body 1 is further provided with a communication interface 8 and a power interface 9, the power interface 9 is used for electrifying the noise reduction devices, a plurality of noise reduction devices can be simultaneously installed in the device to be noise reduced, and the plurality of noise reduction devices are mutually connected through the communication interface 8. The communication interface 8 is preferably an RJ45 interface, which may also be a USB or CAN (controller area network).
The invention also provides a noise reduction method, as shown in fig. 4, which is suitable for the noise reduction device of the above embodiment, and the active noise reduction method includes: s10: installing a noise reduction device in a device to be noise reduced; s20: determining the setting position of the sound collecting device according to different installation scenes; s30: after the noise reduction device is started, sound field identification is carried out on the working environment; s40: and entering an active noise reduction mode, and controlling the sound generating device to generate a first sound wave.
Specifically, as shown in fig. 5, first, one or more noise reducing devices are installed in the device to be noise reduced, and communication connection is performed between one noise reducing device and the device to be noise reduced, or between a plurality of noise reducing devices and the device to be noise reduced; secondly, selecting functions, selecting to perform sound field identification or active noise reduction, when the sound field environment where the noise reduction devices are located changes, selecting the sound field to identify, electrifying the noise reduction devices, starting program identification among the noise reduction devices, identifying a master module and a slave module in the noise reduction devices, then controlling the sound production device to perform sound field identification, acquiring sound wave information sent by the noise reduction devices to be reduced after the sound field identification, and waiting for switching the functions of the noise reduction devices to the active noise reduction; and when the function selection is active noise reduction, powering on the noise reduction devices, starting program identification among the noise reduction devices, identifying a master module and a slave module in the noise reduction devices, and then starting an active noise reduction mode.
Wherein, S10: installing a suitable number of noise reducing devices in the device to be denoised, one or more noise reducing devices being installable; s20: determining the setting position of the sound collecting device according to different installation scenes; for an application scenario with a relatively obvious noise source, a part of sound collecting devices can be installed near the noise source to be used as feed-forward devices for collecting noise source signals to the controller. And other microphones are arranged near the controlled sound field and used as feedback devices to feed the sound wave information obtained by overlapping the first sound wave generated by the sound generating device 2 and the original sound wave back to the controller. If the noise source is not obvious in the application scene, all sound collecting devices can be set as feedback and are arranged near the controlled area; the feed forward and feedback microphone signal functional diagrams are shown in fig. 6; s30: after the noise reduction device is started, sound field identification is carried out on the working environment; s40: and entering an active noise reduction mode, and controlling the sound generating device to generate a first sound wave.
In the actual use process, a plurality of noise reduction devices (which can be one noise reduction device) are installed in the equipment or environment to be noise reduced by selecting proper installation positions; taking a plurality of noise reduction devices as an example, the plurality of noise reduction devices are connected with each other through a communication interface 8, one noise reduction device in the plurality of noise reduction devices is selected as a master module, and the other noise reduction devices are selected as slave modules, wherein the master module is used as a reference of the plurality of slave modules, and parameters of the master module are used as a reference when the sound wave frequency or sound field environment is adjusted; and then the microphone array is connected with the noise reduction devices through the sound collection device connecting parts, a plurality of microphones in the microphone array can be properly distributed and connected to each noise reduction device, and microphone signals collected by the plurality of noise reduction devices are sent to the main module through the communication interface 8 for processing and distribution.
Before the power is switched on, firstly, the function of the noise reduction device needs to be operated through a second function conversion key so as to select the function of the noise reduction device as 'sound field identification' or 'active noise reduction'; the method comprises the steps of performing function selection on each microphone connected to the noise reduction devices, wherein the selection is respectively 'feedback' or 'feedforward', the function selection is performed on the microphone arranged in a target noise reduction area, the function selection is performed on the microphone arranged in the vicinity of a noise source, the function selection is performed on the microphone arranged in the vicinity of the noise source, and the number of the microphones selected as 'feedback' in the sum of the number of the microphones connected to each noise reduction device is more than or equal to 1 (all the microphones can be.
Sequentially powering on each noise reduction device within preset time, wherein the preset time is preferably 20s, wherein an internal program automatically runs and starts to identify the number of slave modules connected to the program by waiting for 20s after powering on, if the slave modules are not powered on, the master module ignores the slave modules, and because the power-on time sequences of the master module and the slave modules are different, the master module waits for a period of time after powering on to ensure that the slave modules needing to be used are connected into the program, then the system automatically identifies the noise reduction devices and the function selection of a plurality of microphones, and each noise reduction device automatically identifies and defines the master module and the slave modules according to the connection number of communication interfaces of the noise reduction device; in the "sound field recognition" mode, the controller sequentially drives the sound emission devices 2 in the respective modules to emit sounds to recognize the sound field information.
After the sound field identification is completed, the loudspeakers of all the modules stop emitting sound, all the modules perform a waiting mode, and a user selects the function of the main module as 'active noise reduction'; and then the system starts to carry out active noise reduction mode to carry out noise elimination, the control system monitors microphone signals in real time in the noise reduction process, if part of the microphone signals are abnormal, the control system stops noise reduction and lights an indicator lamp corresponding to the sound collecting device connecting part to remind a user of detecting whether the microphone at the corresponding position is correctly connected.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:
the noise reduction device comprises a machine body 1, a sound production device 2, a sound collection device connecting part 3 and a control module 12, wherein a mounting cavity 10 is arranged in the machine body 1, and at least part of the sound production device 2 is arranged in the mounting cavity 10 and used for producing first sound waves; the sound collecting device connecting part 3 is arranged on the machine body 1, and the sound collecting device connecting part 3 is used for being electrically connected with the sound collecting device and transmitting second sound waves collected by the sound collecting device so as to enable at least part of the first sound waves and at least part of the second sound waves to be mutually offset; the control module is installed in installation cavity 10, and sound generating mechanism 2 and adopt sound device connecting portion 3 all are connected with control module. The noise reduction device can be integrally arranged, when the noise reduction device is arranged, all parts of the noise reduction device are not required to be respectively arranged, the noise collection device is only required to be connected to the noise collection device connecting portion 3 through a wire, the installation space is reduced, the noise reduction device can be integrally installed in different equipment to be reduced, and the applicability of the noise reduction device is improved.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (11)
1. A noise reducing device, comprising:
the device comprises a machine body (1), wherein a mounting cavity (10) is arranged in the machine body (1);
the sound generating device (2) is at least partially arranged in the mounting cavity (10) and is used for generating first sound waves;
the sound collecting device connecting part (3) is arranged on the machine body (1), and the sound collecting device connecting part (3) is electrically connected with the sound collecting device and used for transmitting a second sound wave collected by the sound collecting device so as to enable at least part of the first sound wave and at least part of the second sound wave to be mutually offset;
the control module (12) is installed in the installation cavity (10), and the sound generating device (2) and the sound collecting device connecting portion (3) are connected with the control module.
2. The noise reduction device according to claim 1, wherein the sound collecting device connecting portion (3) is plural, and the plural sound collecting device connecting portions (3) are provided at intervals on the machine body (1).
3. The noise reduction device according to claim 2, further comprising:
the first function conversion key (4) is arranged on the machine body (1) and connected with the sound collecting device connecting part (3) so as to control the working state of the sound collecting device connecting part (3) through the first function conversion key (4).
4. The noise reduction device according to claim 3, wherein the first function switching key (4) is provided in plurality, and a plurality of the first function switching keys (4) are provided in one-to-one correspondence with a plurality of the sound collecting device connecting portions (3).
5. The noise reduction device of claim 1, further comprising:
and the second function conversion key (5) is arranged on the machine body (1), and the second function conversion key (5) is connected with the sound generating device (2) so as to control the working state of the sound generating device (2) through operation of the second function conversion key (5).
6. The noise reduction device according to any one of claims 1 to 5, characterized by further comprising:
the sound absorption component (6) is installed in the installation cavity (10), at least part of the sound absorption component (6) is attached to the inner wall of the installation cavity (10), and the sound absorption component (6) is used for absorbing at least part of high-frequency sound waves in the first sound waves.
7. The noise reduction device according to any one of claims 1 to 5, characterized in that the machine body (1) comprises:
apron (11), the setting is in the top of installation cavity (10), the at least part of sound generating mechanism (2) is installed on apron (11), the sound production chamber orientation of sound generating mechanism (2) the outside of installation cavity (10).
8. The noise reduction device according to claim 7, characterized in that the sound generating device (2) is a loudspeaker.
9. The noise reduction device according to any one of claims 1 to 5, wherein the mounting cavity (10) comprises a first mounting cavity (101) and a second mounting cavity (102) which are adjacently arranged, the control module is mounted in the first mounting cavity (101), and at least part of the sound generating device (2) is mounted in the second mounting cavity (102).
10. The noise reduction device of claim 9, further comprising:
baffle (7), set up in installation cavity (10), the side of baffle (7) with the lateral wall laminating of installation cavity (10) is in order to pass through baffle (7) will installation cavity (10) divide into first installation cavity (101) with second installation cavity (102).
11. A noise reduction method applied to the noise reduction apparatus according to any one of claims 1 to 10, characterized by comprising:
s10: installing a noise reduction device in a device to be noise reduced;
s20: determining the setting position of the sound collecting device according to different installation scenes;
s30: after the noise reduction device is started, sound field identification is carried out on the working environment;
s40: and entering an active noise reduction mode, and controlling the sound generating device to generate a first sound wave.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010936435.2A CN111862929A (en) | 2020-09-08 | 2020-09-08 | Noise reduction device and noise reduction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010936435.2A CN111862929A (en) | 2020-09-08 | 2020-09-08 | Noise reduction device and noise reduction method |
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| CN111862929A true CN111862929A (en) | 2020-10-30 |
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| CN202010936435.2A Withdrawn CN111862929A (en) | 2020-09-08 | 2020-09-08 | Noise reduction device and noise reduction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112797557A (en) * | 2021-01-15 | 2021-05-14 | 珠海格力电器股份有限公司 | Purification equipment |
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| CN110838282A (en) * | 2019-11-21 | 2020-02-25 | 珠海格力电器股份有限公司 | Composite sound absorption device and method for drying air duct of washing machine and washing machine |
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| CN112797557A (en) * | 2021-01-15 | 2021-05-14 | 珠海格力电器股份有限公司 | Purification equipment |
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