CN111754972A - Noise reduction device and method and electrical equipment - Google Patents
Noise reduction device and method and electrical equipment Download PDFInfo
- Publication number
- CN111754972A CN111754972A CN202010671201.XA CN202010671201A CN111754972A CN 111754972 A CN111754972 A CN 111754972A CN 202010671201 A CN202010671201 A CN 202010671201A CN 111754972 A CN111754972 A CN 111754972A
- Authority
- CN
- China
- Prior art keywords
- noise
- signal
- sound wave
- motor
- sound
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000009467 reduction Effects 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000005428 wave function Effects 0.000 claims description 12
- 238000003860 storage Methods 0.000 claims description 4
- 238000004590 computer program Methods 0.000 claims description 3
- 238000005253 cladding Methods 0.000 claims description 2
- 230000007246 mechanism Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 8
- 239000000428 dust Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The invention discloses a noise reduction device and method and electrical equipment. Wherein, the device includes: the sound collection cover is covered outside the motor and used for carrying out concentrated reflection on the noise generated by the motor; the sound wave collecting devices are arranged at different positions of the sound collecting cover and are used for collecting noise signals generated by the motor; the control circuit is used for fitting the noise signal to generate a cancellation sound wave signal; and the sound generating device is used for generating the cancellation sound wave signal so as to cancel the noise signal. According to the invention, the noise signal can be accurately restored and offset by offsetting the sound wave signal, so that the noise reduction effect is improved.
Description
Technical Field
The invention relates to the technical field of noise reduction, in particular to a noise reduction device, a noise reduction method and electrical equipment.
Background
The sound is generated by the vibration of an object, most of the noise of some electric appliances (such as a dust collector) comes from the vibration of a motor, the effect of the dust collector is better, the power of the motor is higher, the vibration noise is higher, and since the vibration is a noise source, the problem of noise can be effectively solved by solving the vibration in the aspect of solving the problem of high noise of the electric appliances. The existing electric appliance mainly adopts a passive noise reduction mode aiming at vibration noise, and the noise reduction effect is poor.
Aiming at the problems that the electric appliance adopts a passive noise reduction mode in the prior art and the noise reduction effect is poor, an effective solution is not provided at present.
Disclosure of Invention
The embodiment of the invention provides a noise reduction device, a noise reduction method and electrical equipment, and aims to solve the problem that in the prior art, an electrical appliance adopts a passive noise reduction mode, and the noise reduction effect is poor.
In order to solve the above technical problem, the present invention provides a noise reduction apparatus, wherein the apparatus comprises:
the sound collection cover is covered outside the motor and used for carrying out concentrated reflection on the noise generated by the motor;
the sound wave collecting devices are arranged at different positions of the sound collecting cover and are used for collecting noise signals generated by the motor;
the control circuit is used for fitting the noise signal to generate a cancellation sound wave signal;
and the sound generating device is used for generating the cancellation sound wave signal so as to cancel the noise signal.
Further, the control circuit generates a canceling sound wave signal having a phase opposite to that of the noise signal.
Further, the device comprises three sound wave acquisition devices which respectively correspond to the upper side, the left side and the right side of the motor.
Further, the apparatus further comprises:
the buffer structure is arranged at the bottom of the motor and comprises a convex part;
the base comprises a concave part, the convex part of the buffer structure is of an elastic structure and is embedded into the concave part of the base, and a preset gap is kept between the convex part and the concave part of the base.
Further, the convex part of the buffer structure is hemispherical.
Further, the apparatus further comprises:
the vacuum layer, the sealed cladding of vacuum layer is in sound collection cover two at least sound wave collection system the motor sound generating mechanism buffer structure and the outside of base.
The invention also provides electrical equipment which comprises a motor and the noise reduction device.
The invention also provides a noise reduction method based on the noise reduction device, which comprises the following steps:
collecting noise signals at different positions;
generating a cancellation sound wave signal according to the noise signal;
and controlling the generating device to send out the cancellation sound wave signal so as to cancel the noise signal.
Further, generating a cancelling sound wave signal from the noise signal, comprising:
and fitting the noise signal to generate a cancellation sound wave signal.
Further, fitting the noise signal includes:
calculating the average value of the wave function values of different noise signals at the same time;
and drawing a wave function curve according to the average value of the wave function values at each moment in the acquisition period to obtain a fitted noise signal.
Further, generating a cancelling sound wave signal from the noise signal, comprising:
and generating a cancellation sound wave signal which is opposite to the noise signal in limit according to the fitted noise signal.
The present invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the above noise reduction method.
By applying the technical scheme of the invention, the noise generated by the motor is reflected in a concentrated manner through the sound collection cover arranged outside the motor; the method comprises the following steps that at least two sound wave acquisition devices are arranged, correspond to different positions of a motor respectively and are used for acquiring noise signals generated by the motor; a control circuit is arranged, and the sound generating device is controlled to send out a sound wave counteracting signal according to the noise signal; and the sound generating device is used for generating a cancellation sound wave signal for canceling the noise signal under the control of the control chip. Therefore, the noise signal can be accurately restored and offset by offsetting the sound wave signal, and the noise reduction effect is improved.
Drawings
Fig. 1 is a structural view of a noise reducing device according to an embodiment of the present invention;
FIG. 2 is a block diagram of a noise reducer according to an embodiment of the present invention;
FIG. 3 is a block diagram of a cleaner according to an embodiment of the present invention;
fig. 4 is a flowchart of a noise reduction method according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and "a plurality" typically includes at least two.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be understood that although the terms first, second, third, etc. may be used to describe microphones in embodiments of the present invention, the microphones should not be limited to these terms. These terms are only used to distinguish microphones disposed at different locations. For example, a first microphone may also be referred to as a second microphone, and similarly, a second microphone may also be referred to as a first microphone, without departing from the scope of embodiments of the present invention.
The words "if", as used herein, may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrases "if determined" or "if detected (a stated condition or event)" may be interpreted as "when determined" or "in response to a determination" or "when detected (a stated condition or event)" or "in response to a detection (a stated condition or event)", depending on the context.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in the article or device in which the element is included.
Alternative embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Example 1
The embodiment provides a noise reduction device, which is applied to noise reduction of a motor, and fig. 1 is a structural diagram of the noise reduction device according to the embodiment of the invention, as shown in fig. 1, the device includes: the sound collection cover 11 is covered outside the motor and used for carrying out concentrated reflection on the noise generated by the motor 2 so as to be convenient for collecting noise signals; at least two sound wave collecting devices 12 installed at different positions of the sound collecting cover 11 for collecting noise signals generated by the motor 2; for example, the number of the sound wave collecting devices 12 may be two, and the two sound wave collecting devices are respectively disposed in the sound collecting cover 11 and on the left side and the right side of the motor 2, or respectively disposed above and on the side of the motor 2, and the sound wave collecting devices 12 are installed at different positions of the sound collecting cover 11 and are used for synchronously collecting noise signals generated by the motor 2 based on different directions.
The control circuit 13 is used for fitting the noise signal to generate a cancellation sound wave signal; the control circuit 13 is configured to control the sound generating device 14 to generate a cancellation sound wave signal according to the noise signals collected by the at least two sound wave collecting devices 12, and the control circuit 13 is specifically configured to: fitting the noise signals acquired by the at least two sound wave acquisition devices; and controlling the sound generating device 14 to generate a cancellation sound wave signal according to the fitted noise signal. The phase of the generated cancellation sound wave signal is opposite to that of the noise signal, namely, the phase difference between the cancellation sound wave signal and the noise signal is 180 degrees, namely, the wave crest of the cancellation sound wave signal corresponds to the wave trough of the noise signal, and the wave trough of the cancellation sound wave signal corresponds to the wave crest of the noise signal.
And the sound generating device 14 is used for generating the cancellation sound wave signal under the control of the control circuit 13 so as to cancel the noise signal.
The noise reduction device is provided with at least two sound wave acquisition devices, wherein the at least two sound wave acquisition devices are respectively arranged at different positions of a motor and are used for acquiring noise signals generated by the motor; the sounding device 14 is arranged and used for sending out a cancellation sound wave signal for canceling the noise signal under the control of the control chip; the control chip is arranged to control the sound generating device 14 to send out a counteracting sound wave signal according to the noise signals collected by the at least two sound wave collecting devices, so that the noise signals can be accurately restored, and the counteracting sound wave signal counteracts the noise signals, so that the noise reduction effect is improved.
Example 2
This embodiment provides a noise reduction apparatus, and fig. 2 is a structural diagram of a noise reduction apparatus according to an embodiment of the present invention, as shown in fig. 2, the apparatus further includes: in the present embodiment, the device includes three sound wave collecting devices 12, which respectively correspond to the upper position, the left position and the right position of the motor 2, so as to collect noise signals based on different directions.
Since the generation of noise is caused by vibration, the noise can be reduced by blocking the propagation of vibration of the motor 2 in addition to the above-described active noise reduction method, and thus, as shown in fig. 2, the apparatus further includes: a buffer structure 15 disposed at the bottom of the motor 2, the buffer structure including a convex portion 151; the device further comprises a base 16 comprising a concave portion 161, wherein the convex portion 151 of the buffer structure is an elastic structure and is embedded in the concave portion 161 of the base, and a preset gap is kept between the concave portion 161 of the base and the convex portion. By disposing the buffer structure 15 and the base 16 at an interval, the natural frequency of the motor during operation is destroyed, and the noise is further reduced. Specifically, the convex portion of the buffer structure 15 is hemispherical, so that the rotation is more flexible.
In order to further block the outward propagation of the noise generated by the motor 2, the noise reduction device further comprises: the vacuum layer 17 is hermetically coated outside the sound collection cover 11, the sound wave collecting device 12, the motor 2, the sound generating device 14, the buffer structure 15 and the base 16, and is used for preventing noise generated by the motor 2 from being transmitted to an external space so as to reduce the noise.
Example 3
Fig. 3 is a structural view of a vacuum cleaner according to an embodiment of the present invention, and as shown in fig. 3, the vacuum cleaner includes an active noise reduction device, a motor 32, a dust collecting device 33, and a main body 34. Wherein, the active noise reduction device includes: a sound collection cover 311 (i.e. the sound collection cover 11 in the above-mentioned embodiment), three microphones (i.e. the sound wave collection device 12 in the above-mentioned embodiment), a control circuit 313 (i.e. the control circuit 13 in the above-mentioned embodiment), and a speaker 314 (i.e. the sound production device 14 in the above-mentioned embodiment), wherein the sound collection cover 311 is disposed outside the motor to form a wrapping structure for the motor 32, which is favorable for the concentrated reflection of the noise wave signals of the motor, the three first microphone 312a, the second microphone 312b, and the third microphone 312c mounted on the sound collection cover 311 are respectively located above, on the right side, and on the right side of the motor, when the motor 32 is turned on, the active noise reduction device is turned on simultaneously, the three microphones receive the noise in the dust collector at the same time, and output three sections of noise wave signals to the control circuit after receiving the three sections of noise wave signals, the control circuit, gather noise wave signal in three position, noise wave signal that the reduction motor that again can be better sent after fitting noise wave signal, control circuit exports the cancellation wave signal opposite with the noise wave signal phase place after the completion sound wave, because of the signal transmission speed is higher than sound transmission, control circuit uses the noise crest acoustic spectrum point after the fitting to control the trough acoustic spectrum of speaker output opposite with noise wave signal crest phase place as signal point, the crest of noise and the trough of cancellation signal coincide mutually this moment, accomplish first heavy noise reduction.
In addition, the mounting seat below the motor 32 is provided with a spherical buffer structure 321, the spherical buffer structure 321 is made of elastic material, a gap of 1-2mm exists between the outermost layer of the spherical buffer structure 321 and the motor mounting seat 322, when the dust collector is started, the motor 32 starts to operate, and the spherical buffer structure 321 at the bottom of the motor 32 destroys the natural vibration frequency transmitted to the machine body 34 when the motor operates. The vibration noise of the machine body driven by the vibration of the motor is reduced, so that the second noise reduction is realized.
Finally, a vacuum layer 315 (i.e., the vacuum layer 17 in the above embodiment) is formed between the fuselage shell and the fuselage through vacuum pumping, and the vacuum layer 315 can block noise transmission, and a third noise reduction is realized by using a vacuum layer outside the fuselage.
Example 4
The present embodiment provides a noise reduction method, and fig. 4 is a flowchart of a noise reduction method according to an embodiment of the present invention, as shown in fig. 4, the method includes:
and S101, collecting noise signals at different positions.
During specific implementation, noise signals generated by the motor can be synchronously acquired through the sound wave acquisition devices arranged at different positions of the motor based on different positions.
And S102, generating a cancellation sound wave signal according to the noise signal.
Due to the fact that obstacles in different positions in space are different and the like, in the process of propagation, noise signals acquired based on different positions are different, if noise signals generated by the motor need to be accurately restored, the noise signals acquired in each direction need to be fully considered, and therefore in the embodiment, cancellation sound wave signals are generated according to the noise signals acquired based on at least two different positions.
S103, controlling a generating device to send out the cancellation sound wave signal so as to cancel the noise signal.
The noise reduction method of the embodiment acquires a noise signal generated by a motor based on at least two different positions; according to the noise reduction method and device, the offset sound wave signals are generated according to the noise signals acquired based on at least two different positions so as to offset the noise signals, the noise signals can be accurately restored, and the noise signals are offset through the offset sound wave signals, so that the noise reduction effect is improved.
Example 5
In this embodiment, another noise reduction method is provided, in order to determine a final noise signal according to a plurality of noise signals, where the step S101 specifically includes: fitting the noise signals acquired based on the at least two different positions; and controlling the sound generating device to generate a cancellation sound wave signal according to the fitted noise signal. Specifically, the method comprises the following steps: calculating the average value of the wave function values of different noise signals at the same time; drawing a wave function curve according to the average value of the wave function values at each moment in the acquisition period to obtain a fitted noise signal, and generating a cancellation sound wave signal with the limit opposite to that of the noise signal according to the fitted noise signal by a control circuit after drawing the wave function curve of the fitted noise signal; drawing a wave function curve of the noise signal after fitting three noise signals according to the average value of the wave function values at each moment in the acquisition period to obtain the fitted noise signal, and generating a cancellation sound wave signal according to the fitted noise signal, wherein the phase of the cancellation sound wave signal is opposite to that of the noise signal, namely the phase difference between the cancellation sound wave signal and the noise signal is 180 degrees, namely the wave crest of the cancellation sound wave signal corresponds to the wave trough of the noise signal, and the wave trough of the cancellation sound wave signal corresponds to the wave crest of the noise signal.
Example 6
The present embodiment provides a computer-readable storage medium on which a computer program is stored, characterized in that the program, when executed by a processor, implements the noise reduction method in the above-described embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (12)
1. A noise reducing device, the device comprising:
the sound collection cover is covered outside the motor and used for carrying out concentrated reflection on the noise generated by the motor;
the sound wave collecting devices are arranged at different positions of the sound collecting cover and are used for collecting noise signals generated by the motor;
the control circuit is used for fitting the noise signal to generate a cancellation sound wave signal;
and the sound generating device is used for generating the cancellation sound wave signal so as to cancel the noise signal.
2. The apparatus of claim 1, wherein the control circuit generates the cancelling acoustic wave signal with a phase opposite to a phase of the noise signal.
3. The device of claim 1, wherein the device comprises three sound wave collection devices corresponding to the upper, left and right sides of the motor.
4. The apparatus of claim 1, further comprising:
the buffer structure is arranged at the bottom of the motor and comprises a convex part;
the base comprises a concave part, the convex part of the buffer structure is of an elastic structure and is embedded into the concave part of the base, and a preset gap is kept between the convex part and the concave part of the base.
5. The apparatus of claim 4, wherein the convex portion of the cushioning structure is hemispherical.
6. The apparatus of claim 5, further comprising:
the vacuum layer, the sealed cladding of vacuum layer is in sound collection cover two at least sound wave collection system the motor sound generating mechanism buffer structure and the outside of base.
7. An electrical apparatus comprising an electrical machine, characterized in that it further comprises a noise reducing device according to any of claims 1-6.
8. A noise reduction method implemented based on the noise reduction apparatus according to any one of claims 1 to 6, the method comprising:
collecting noise signals at different positions;
generating a cancellation sound wave signal according to the noise signal;
and controlling the generating device to send out the cancellation sound wave signal so as to cancel the noise signal.
9. The method of claim 8, wherein generating a canceling acoustic signal from the noise signal comprises:
and fitting the noise signal to generate a cancellation sound wave signal.
10. The method of claim 9, wherein fitting the noise signal comprises:
calculating the average value of the wave function values of different noise signals at the same time;
and drawing a wave function curve according to the average value of the wave function values at each moment in the acquisition period to obtain a fitted noise signal.
11. The method of claim 10, wherein generating a canceling acoustic signal from the noise signal comprises:
and generating a cancellation sound wave signal which is opposite to the noise signal in limit according to the fitted noise signal.
12. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the noise reduction method according to any one of claims 8 to 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010671201.XA CN111754972A (en) | 2020-07-13 | 2020-07-13 | Noise reduction device and method and electrical equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010671201.XA CN111754972A (en) | 2020-07-13 | 2020-07-13 | Noise reduction device and method and electrical equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111754972A true CN111754972A (en) | 2020-10-09 |
Family
ID=72711337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010671201.XA Pending CN111754972A (en) | 2020-07-13 | 2020-07-13 | Noise reduction device and method and electrical equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111754972A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06343584A (en) * | 1993-05-19 | 1994-12-20 | Samsung Electron Co Ltd | Noise controller for vacuum cleaner |
| CN2484292Y (en) * | 2001-07-20 | 2002-04-03 | 杨锋杰 | Novel fully-sealed hydraulic buffering rolling-cylinder ear |
| US20060070203A1 (en) * | 2004-10-04 | 2006-04-06 | Fischer Richard J | Vacuum cleaner equipped with sound cancellation generator |
| CN201378766Y (en) * | 2009-03-26 | 2010-01-06 | 罗建元 | Cushioning and damping device for dust cleaner motor |
| CN205194324U (en) * | 2015-11-18 | 2016-04-27 | 重庆新世杰电气股份有限公司 | Large -scale generating set's active noise reduction silence device |
| CN106388700A (en) * | 2016-06-06 | 2017-02-15 | 北京小米移动软件有限公司 | Active noise reduction device for automatic cleaning equipment and automatic cleaning equipment |
| CN207870840U (en) * | 2017-06-26 | 2018-09-18 | 美的集团股份有限公司 | Dust catcher |
| CN207939327U (en) * | 2018-03-30 | 2018-10-02 | 商丘师范学院 | A kind of motor with shock-absorbing function |
| CN208973672U (en) * | 2018-08-02 | 2019-06-14 | 无锡朗驰清洁设备有限公司 | A kind of dust catcher with denoising structure |
| CN110870003A (en) * | 2017-08-29 | 2020-03-06 | 松下知识产权经营株式会社 | Signal processing device, noise canceling system, signal processing method, and program |
| CN212365489U (en) * | 2020-07-13 | 2021-01-15 | 珠海格力电器股份有限公司 | Noise reduction device and electrical equipment |
-
2020
- 2020-07-13 CN CN202010671201.XA patent/CN111754972A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06343584A (en) * | 1993-05-19 | 1994-12-20 | Samsung Electron Co Ltd | Noise controller for vacuum cleaner |
| CN2484292Y (en) * | 2001-07-20 | 2002-04-03 | 杨锋杰 | Novel fully-sealed hydraulic buffering rolling-cylinder ear |
| US20060070203A1 (en) * | 2004-10-04 | 2006-04-06 | Fischer Richard J | Vacuum cleaner equipped with sound cancellation generator |
| CN201378766Y (en) * | 2009-03-26 | 2010-01-06 | 罗建元 | Cushioning and damping device for dust cleaner motor |
| CN205194324U (en) * | 2015-11-18 | 2016-04-27 | 重庆新世杰电气股份有限公司 | Large -scale generating set's active noise reduction silence device |
| CN106388700A (en) * | 2016-06-06 | 2017-02-15 | 北京小米移动软件有限公司 | Active noise reduction device for automatic cleaning equipment and automatic cleaning equipment |
| CN207870840U (en) * | 2017-06-26 | 2018-09-18 | 美的集团股份有限公司 | Dust catcher |
| CN110870003A (en) * | 2017-08-29 | 2020-03-06 | 松下知识产权经营株式会社 | Signal processing device, noise canceling system, signal processing method, and program |
| CN207939327U (en) * | 2018-03-30 | 2018-10-02 | 商丘师范学院 | A kind of motor with shock-absorbing function |
| CN208973672U (en) * | 2018-08-02 | 2019-06-14 | 无锡朗驰清洁设备有限公司 | A kind of dust catcher with denoising structure |
| CN212365489U (en) * | 2020-07-13 | 2021-01-15 | 珠海格力电器股份有限公司 | Noise reduction device and electrical equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111800688B (en) | Active noise reduction method and device, electronic equipment and storage medium | |
| JP3418705B2 (en) | Active noise reduction method and apparatus in local area | |
| US8447045B1 (en) | Multi-microphone active noise cancellation system | |
| CN110010143B (en) | Voice signal enhancement system, method and storage medium | |
| US8611552B1 (en) | Direction-aware active noise cancellation system | |
| WO2003105524A1 (en) | Method and system for reducing noise | |
| US20100296666A1 (en) | Apparatus and method for noise cancellation in voice communication | |
| WO2016144509A1 (en) | Apparatus and method of active noise cancellation in a personal listening device | |
| CN104519212A (en) | An echo cancellation method and apparatus | |
| EP1856690A1 (en) | Method and device for controlling active noises using film speakers | |
| EP1932144A1 (en) | A system for providing a reduction of audiable noise perception for a human user | |
| CN104536477A (en) | Glass noise active control silencing system and operating method | |
| CN212365489U (en) | Noise reduction device and electrical equipment | |
| CN112270915A (en) | Active noise reduction method for indoor space | |
| CN111754972A (en) | Noise reduction device and method and electrical equipment | |
| AU7014594A (en) | Vehicle operator station with three dimensional active noise cancellation | |
| Håkansson et al. | Noise Canceling Headsets for Speech Communication | |
| WO1994011953A9 (en) | Active noise cancellation system | |
| WO1994011953A2 (en) | Active noise cancellation system | |
| CN210227657U (en) | Feedback type noise reduction pillow | |
| Pal et al. | Ambulance siren noise reduction using virtual sensor based feedforward ANC system | |
| JPH0336897A (en) | Electronic silencing system | |
| CN215718320U (en) | Glass vibration suppression system and glass vibration suppression device | |
| Habib et al. | Open IEN issues of active noise control applications | |
| JPS63311396A (en) | Electronic muffling system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |