CN112788451A - System of preventing whistling of artificial intelligence meeting - Google Patents
System of preventing whistling of artificial intelligence meeting Download PDFInfo
- Publication number
- CN112788451A CN112788451A CN202110002900.XA CN202110002900A CN112788451A CN 112788451 A CN112788451 A CN 112788451A CN 202110002900 A CN202110002900 A CN 202110002900A CN 112788451 A CN112788451 A CN 112788451A
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- board
- sound
- inner shell
- microphone
- shell
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- 238000013473 artificial intelligence Methods 0.000 title claims description 10
- 238000009413 insulation Methods 0.000 claims abstract description 20
- 230000002265 prevention Effects 0.000 claims abstract description 16
- 230000005855 radiation Effects 0.000 claims abstract description 13
- 229910052602 gypsum Inorganic materials 0.000 claims description 26
- 239000010440 gypsum Substances 0.000 claims description 26
- 239000004816 latex Substances 0.000 claims description 18
- 229920000126 latex Polymers 0.000 claims description 18
- 239000010410 layer Substances 0.000 claims description 15
- 230000035939 shock Effects 0.000 claims description 11
- 229920000742 Cotton Polymers 0.000 claims description 7
- 241000209140 Triticum Species 0.000 claims description 6
- 235000021307 Triticum Nutrition 0.000 claims description 6
- 239000006096 absorbing agent Substances 0.000 claims description 6
- 239000011229 interlayer Substances 0.000 claims description 5
- 229920001971 elastomer Polymers 0.000 claims description 4
- 238000010030 laminating Methods 0.000 claims description 4
- 239000000839 emulsion Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 6
- 238000005192 partition Methods 0.000 abstract description 6
- 230000000712 assembly Effects 0.000 abstract 2
- 238000000429 assembly Methods 0.000 abstract 2
- 230000002401 inhibitory effect Effects 0.000 abstract 1
- 238000003860 storage Methods 0.000 description 5
- 238000013016 damping Methods 0.000 description 4
- 238000003491 array Methods 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000002592 echocardiography Methods 0.000 description 2
- 230000000452 restraining effect Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000012771 pancakes Nutrition 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
-
- 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
- G10K11/162—Selection of materials
- G10K11/168—Plural layers of different materials, e.g. sandwiches
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/02—Circuits for transducers, loudspeakers or microphones for preventing acoustic reaction, i.e. acoustic oscillatory feedback
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Multimedia (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The invention discloses a squealing prevention system for an artificial intelligent conference, and particularly relates to the field of squealing prevention, which comprises an inner shell and an outer shell, wherein the outer shell is sleeved above the inner shell, the inner shell is detachable, a loudspeaker for producing sound is arranged at the top of the inner shell, the outer shell comprises a top plate attached to the top of the inner shell, a partition member for sound insulation is arranged at the bottom of the edge of the top plate, a sound insulation plate is attached to the outer part of the partition member, the partition member and the sound insulation plate are used for shielding a radiation area of the loudspeaker, a plurality of microphone heads are arranged on the outer wall of the sound insulation plate, squealing prevention assemblies are arranged at the top and the bottom of a vacuum plate, and the squealing prevention assemblies are used for separating a sound pickup area of the microphone heads from the radiation area of the. The invention avoids the sound reproduction area of the loudspeaker when using the microphone head, the sound radiation area of the loudspeaker can not be overlapped with the use area of the microphone head, and the effect of inhibiting the audio squeal can be well realized.
Description
Technical Field
The invention relates to the field of howling prevention, in particular to a howling prevention system for an artificial intelligent conference.
Background
The use of speech systems is common. For example, in a teleconferencing system, participants are typically grouped together in an office or conference room and seated in different locations in the room. The rooms being used are typically not equipped with special sound cutting material and the echo of the near and far end sounds increases the noise level. If the room is large enough, some participants may sit away from the telephone table, taking themselves away from the microphone. Some participants may not speak actively or only occasionally. However, their presence increases the number of room noise sources, as pencils can be knocked, paper can be rustling, and private conversations can occur. These sources of noise further degrade the sound quality experienced by a group of people at a remote location. Most speech systems have microphones deployed at one, two or at most three locations. These microphones are typically placed on the conference table surface and distributed in a way that provides the best use for the most important contributors to the conference. This choice of microphone location may be difficult for some contributors to hear. When occasional participants speak, they are often forced to close up against the microphone, which undoubtedly generates additional room noise, because they swap places or move the chair. Microphone arrays are generally designed as free-field devices, and in some cases are embedded within buildings. A problem with prior art microphone arrays is that the beam width decreases with increasing frequency. Microphones with "pancake directivity" for use in speech systems are known. For example, directional microphone devices covering 360 degrees in the horizontal plane exist in the field of telecom and conference hands-free telephony. In order to make conference hands-free telephones efficient, various microphone arrays have been used. A problem with these systems is that the speakerphone type system may show different types of echoes and even howling may occur. For example, acoustic echoes from feedback in the acoustic path between the telephone's speaker and its microphone, since the speaker and microphone are housed in the same housing, acoustic vibrations emanating from the speaker are transmitted to the microphone, which affects the microphone pick-up effect.
Disclosure of Invention
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an artificial intelligence meeting prevent system of whistling, establishes the shell in inner shell top including inner shell and cover, and the inner shell can be dismantled, is provided with the speaker that is used for the sound production at the inner shell top, the shell includes the roof with the laminating of inner shell top roof edge bottom is provided with carries out syllable-dividing interlayer piece, the laminating of interlayer piece outside has the acoustic celotex board, interlayer piece and acoustic celotex board are used for sheltering from the radiation region of speaker, install a plurality of microphone wheat heads on the outer wall of acoustic celotex board, vacuum board top and bottom all are provided with prevents the subassembly of whistling, prevent that the subassembly of whistling is used for separating the pickup region of a plurality of microphone wheat heads from the speaker radiation region.
In a preferred embodiment, the top plate is provided with a plurality of sound emitting holes.
In a preferred embodiment, a storage battery is arranged at the bottom of the inner cavity of the inner shell, and a circuit board is arranged above the storage battery.
In a preferred embodiment, the spacer member comprises an inner gypsum board, an outer gypsum board, soundproof cotton and a latex board, the tops of the inner gypsum board, the outer gypsum board and the latex board are all bonded with the bottom of the top plate, the inner gypsum board is attached to the outer wall of the inner shell, the soundproof cotton is filled between the inner gypsum board and the outer gypsum board, the latex board is bonded on the outer wall of the outer gypsum board, and a plurality of air bubbles are uniformly distributed in the latex board.
In a preferred embodiment, the acoustic panel is adhered to the outer wall of the latex panel, a vacuum chamber is formed inside the acoustic panel, and a shock absorption pad is further wrapped outside the microphone head.
In a preferred embodiment, the anti-squeal assembly is composed of a plurality of layers of gel sheets arranged in parallel, the inner edges of the plurality of layers of gel sheets are bonded to the outer wall of the gel sheets, and a plurality of noise-damping dampers made of rubber springs are connected between two adjacent layers of gel sheets, wherein the gel sheet near one side of the noise-damping sheet is bonded to the outer wall of the noise-damping sheet, and the noise-damping dampers are also used for supporting the plurality of layers of gel sheets.
The invention has the technical effects and advantages that:
the pickup area of the microphone heads is separated from the radiation area of the loudspeaker by the howling prevention component, the loudspeaker and the microphone heads are separated by the sound insulation board and the partition layer piece, sound is restrained from being diffused in the inner part and the upper part of the inner shell, the sound radiation area of the loudspeaker is not overlapped with the use area of the microphone heads when the microphone heads are used, and the effect of restraining the audio howling can be well achieved.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic top view of the present invention.
The reference signs are: 1 inner shell, 2 outer shell, 3 loudspeaker, 4 top plate, 5 interlayer piece, 6 sound insulation board, 7 microphone head, 8 anti-squeal component, 9 sound hole, 10 storage battery, 11 circuit board, 12 inner gypsum board, 13 outer gypsum board, 14 sound insulation cotton, 15 latex board, 16 shock pad, 17 gel board, 18 sound insulation shock absorber.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and 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 invention provides a howling prevention system for an artificial intelligence conference, which comprises an inner shell 1 and an outer shell 2 sleeved above the inner shell 1, wherein the inner shell 1 is detachable, a loudspeaker 3 for producing sound is arranged at the top of the inner shell 1, the outer shell 2 comprises a top plate 4 attached to the top of the inner shell 1, a separation layer piece 5 for sound insulation is arranged at the bottom of the edge of the top plate 4, a sound insulation plate 6 is attached to the outer part of the separation layer piece 5, the separation layer piece 5 and the sound insulation plate 6 are used for shielding the radiation area of the loudspeaker 3, a plurality of microphone heads 7 are arranged on the outer wall of the sound insulation plate 6, howling prevention components 8 are arranged at the top and the bottom of a vacuum plate, and the howling prevention components 8 are used for separating the pickup area of the microphone heads 7 from the radiation area of the loudspeaker 3;
in the using process, speakers of a conference can be respectively seated at each corner of a meeting place, when the speakers need to speak, the anti-howling system is placed on a conference table in front of the speakers, and the microphone head 7 acquires sound after the speakers speak;
since both the microphone head 7 and the speaker 3 have directivity, if the microphone is not used at a position where the sound of the speaker 3 is radiated, the sound of the speaker 3 is not easily transmitted to the microphone head 7; similarly, if the loudspeaker 3 is not in the sound pick-up area of the microphone head 7, the microphone head 7 can hardly pick up the sound of the loudspeaker 3;
on the basis, sound pickup areas of the microphone heads 7 are separated from radiation areas of the loudspeaker 3 by the aid of the howling prevention assembly 8, sound is restrained from being diffused in and above the inner shell 1 by the aid of the sound insulation plate 6 and the partition layer piece 5, the microphone heads 7 are kept away from a sound reproduction area of the loudspeaker 3 when in use, the sound radiation areas of the loudspeaker 3 are not overlapped with the use area of the microphone heads 7, and the effect of restraining audio howling can be well achieved;
a plurality of sound emitting holes 9 are formed in the top plate 4 and are used for transmitting sound of the loudspeaker 3;
a storage battery 10 is arranged at the bottom of the inner cavity of the inner shell 1, and a circuit board 11 is arranged above the storage battery 10 and used for supplying power;
the partition layer piece 5 comprises an inner gypsum board 12, an outer gypsum board 13, soundproof cotton 14 and a latex board 15, the tops of the inner gypsum board 12, the outer gypsum board 13 and the latex board 15 are all bonded with the bottom of the top plate 4, the inner gypsum board 12 is attached to the outer wall of the inner shell 1, and the soundproof cotton 14 is filled between the inner gypsum board 12 and the outer gypsum board 13, so that a soundproof effect can be well realized, and the diffusion of sound in the inner area of the inner shell 1 is inhibited;
the latex board 15 is adhered to the outer wall of the outer gypsum board 13, a plurality of bubbles are uniformly distributed in the latex board 15, the latex board 15 is soft, and the bubbles in the latex board 15 can reduce the vibration phenomenon, absorb the vibration force and inhibit the sound diffusion, and the vibration phenomenon is inhibited, so that the vibration of the external sound insulation board 6 part can be reduced, the microphone head 7 on the sound insulation board 6 can reduce the noise input during the sound sampling, and the sound quality is improved;
the acoustic baffle 6 is bonded on the outer wall of the latex plate 15, a vacuum cavity is formed in the acoustic baffle 6, a layer of shock pad 16 is further wrapped outside the microphone head 7, the shock pad 16 and the vacuum cavity are used for isolating noise, and meanwhile, sound diffusion and squeaking are reduced;
the anti-squeal component 8 is composed of a plurality of layers of gel plates 17 which are arranged in parallel, the inner edges of the layers of gel plates 17 are bonded on the outer wall of the latex plate 15, a plurality of sound-insulating shock absorbers 18 made of rubber springs are connected between the adjacent two layers of gel plates 17, the sampling gel plates 17 form the anti-squeal component 8, vibration can be well reduced in the using process, the sound-insulating shock absorbers 18 made of the rubber springs are matched, the sound area of the loudspeaker 3 can be inhibited from being diffused to the position of the microphone head 7 from the area at the top of the shell 2, and accordingly the occurrence frequency of squeal is reduced;
because in order to make the efficiency that gel sheet 17 can exert better sound insulation and suppression sound field, gel sheet 17 is directly bonded outside emulsion board 15, and emulsion board 15 texture is softer can not provide good support intensity, consequently, the gel sheet 17 that is close to septum 6 one side bonds on septum 6's outer wall, can provide very high structural strength like this, avoid gel sheet 17 to appear rocking, simultaneously syllable-dividing bumper shock absorber 18 still is used for supporting multilayer gel sheet 17, the gel sheet 17 that will be located septum 6 and connect supports, guarantee to realize effectual whistling.
The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;
secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the invention, only the structures related to the disclosed embodiments are referred to, other structures can refer to common designs, and the same embodiment and different embodiments of the invention can be combined with each other without conflict;
and finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.
Claims (6)
1. The utility model provides an artificial intelligence meeting prevent system of whistling, establishes the shell in inner shell top including inner shell and cover, and the inner shell can be dismantled, is provided with the speaker that is used for the sound production at the inner shell top, its characterized in that: the utility model discloses a loudspeaker, including shell, roof edge, baffle, vacuum board, baffle, microphone wheat head, the shell includes the roof with the laminating of inner shell top roof be provided with the septum piece that carries out syllable-dividing bottom roof edge, septum piece outside laminating has the acoustic celotex board, septum piece and acoustic celotex board are used for sheltering from the radiation area of speaker, install a plurality of microphone wheat heads on the outer wall of acoustic celotex board, vacuum board top and bottom all are provided with prevents the subassembly of whistling, prevent that the subassembly of whistling is used for separating the pickup area of a plurality of microphone wheat heads and speaker radiation area.
2. The howling prevention system for an artificial intelligence conference as claimed in claim 1, wherein: the top plate is provided with a plurality of sound-emitting holes.
3. The howling prevention system for an artificial intelligence conference as claimed in claim 1, wherein: the inner chamber bottom of inner shell is provided with the battery, the battery top is provided with the circuit board.
4. The howling prevention system for an artificial intelligence conference as claimed in claim 1, wherein: the interlayer piece comprises an inner gypsum board, an outer gypsum board, soundproof cotton and a latex board, the tops of the inner gypsum board, the outer gypsum board and the latex board are bonded with the bottom of the top plate, the inner gypsum board is attached to the outer wall of the inner shell, the soundproof cotton is filled between the inner gypsum board and the outer gypsum board, the latex board is bonded to the outer wall of the outer gypsum board, and a plurality of bubbles are uniformly distributed in the latex board.
5. The howling prevention system for an artificial intelligence conference as claimed in claim 4, wherein: the acoustic celotex board bonds on the outer wall of emulsion board, the inside vacuous cavity of having seted up of acoustic celotex board, the outside of microphone wheat head has still wrapped up the one deck shock pad.
6. The howling prevention system for an artificial intelligence conference as claimed in claim 4, wherein: the squeaking preventing assembly is composed of multiple layers of gel plates which are arranged in parallel, the inner side edges of the multiple layers of gel plates are bonded on the outer walls of the gel plates, a plurality of sound insulation shock absorbers made of rubber springs are connected between every two adjacent layers of gel plates, the gel plate close to one side of the sound insulation plate is bonded on the outer wall of the sound insulation plate, and the sound insulation shock absorbers are also used for supporting the multiple layers of gel plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110002900.XA CN112788451A (en) | 2021-01-04 | 2021-01-04 | System of preventing whistling of artificial intelligence meeting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110002900.XA CN112788451A (en) | 2021-01-04 | 2021-01-04 | System of preventing whistling of artificial intelligence meeting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112788451A true CN112788451A (en) | 2021-05-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110002900.XA Pending CN112788451A (en) | 2021-01-04 | 2021-01-04 | System of preventing whistling of artificial intelligence meeting |
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| CN (1) | CN112788451A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113709282A (en) * | 2021-08-31 | 2021-11-26 | 北京声智科技有限公司 | Conference telephone |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204633971U (en) * | 2015-05-29 | 2015-09-09 | 江苏省电力公司高邮市供电公司 | For the microphone of videoconference |
| CN207260354U (en) * | 2017-07-04 | 2018-04-20 | 宿迁天华新材料有限公司 | A kind of noise control damping Acoustic barrier plate |
| CN208094742U (en) * | 2018-03-22 | 2018-11-13 | 深圳灵感家科技发展有限公司 | A kind of anti-structure of uttering long and high-pitched sounds of microphone |
| CN210120656U (en) * | 2019-09-30 | 2020-02-28 | 东莞市台德智慧科技有限公司 | Squeaking-preventing structure of K Song treasure |
| CN210927931U (en) * | 2019-12-26 | 2020-07-03 | 深圳市臻为科技有限公司 | Split charging type squeaking-preventing conference terminal |
-
2021
- 2021-01-04 CN CN202110002900.XA patent/CN112788451A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204633971U (en) * | 2015-05-29 | 2015-09-09 | 江苏省电力公司高邮市供电公司 | For the microphone of videoconference |
| CN207260354U (en) * | 2017-07-04 | 2018-04-20 | 宿迁天华新材料有限公司 | A kind of noise control damping Acoustic barrier plate |
| CN208094742U (en) * | 2018-03-22 | 2018-11-13 | 深圳灵感家科技发展有限公司 | A kind of anti-structure of uttering long and high-pitched sounds of microphone |
| CN210120656U (en) * | 2019-09-30 | 2020-02-28 | 东莞市台德智慧科技有限公司 | Squeaking-preventing structure of K Song treasure |
| CN210927931U (en) * | 2019-12-26 | 2020-07-03 | 深圳市臻为科技有限公司 | Split charging type squeaking-preventing conference terminal |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113709282A (en) * | 2021-08-31 | 2021-11-26 | 北京声智科技有限公司 | Conference telephone |
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| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Qian Jing Inventor after: Wei Yutao Inventor after: Li Qinghong Inventor before: Qian Jing Inventor before: Zhao Hongzhi Inventor before: Wei Yutao Inventor before: Li Qinghong |
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Application publication date: 20210511 |
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| RJ01 | Rejection of invention patent application after publication |