CN209710318U - A kind of automatic negative-feedback volume public address system - Google Patents
A kind of automatic negative-feedback volume public address system Download PDFInfo
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- CN209710318U CN209710318U CN201920563241.5U CN201920563241U CN209710318U CN 209710318 U CN209710318 U CN 209710318U CN 201920563241 U CN201920563241 U CN 201920563241U CN 209710318 U CN209710318 U CN 209710318U
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Abstract
The utility model discloses a kind of automatic negative-feedback volume public address systems, belong to the speaker field that amplifies, a kind of automatic negative-feedback volume public address system, including Conference Hall, Conference Hall front end is fixedly connected with dais, dais upper end is fixedly connected with audio processor host, the outer end signal of audio processor host is connected with furred ceiling microphone, the outer end signal of furred ceiling microphone is connected with the speaker that amplifies, audio processor host outer end is equipped with student area sound pickup sensor, in compared to the prior art: to volume adjustment, there are the modes of large error, student area sound pickup sensor and the speaker that amplifies are separated from each other by the utility model, can make that student area sound pickup sensor picks up is that the speaker that amplifies is transmitted to the volume in student area, greatly reduce the error of volume adjustment, this system can will amplify loudness control in optimum range, hearer is set not hear comfortably, Learning effect is improved, hearing is avoided damage to.
Description
Technical field
The utility model relates to the speaker fields that amplifies, more specifically to a kind of automatic negative-feedback volume public address system.
Background technique
In existing meeting, educate in public address system, the sound broadcast out be microphone acquisition user (such as meeting person,
The sound of teacher), amplified by current gain value.And it is practical it is practical in, the pronunciation decibel of each user is different, causes to put
After big, volume cannot be maintained at a good decibel (and 75-78dB), such as collected sound source is smaller (for 50dB
When), fixed gain amplifier is 10dB.The sound to amplify out after so amplifying only has 60dB.Do not hear hearer clear, the criminal of being easy
It is tired, study and effect of meeting are reduced, but if damage is generated to the hearing of teacher and student when long-term loudness is big.
In view of the above-mentioned problems, disclose application No. is: the Chinese utility model patent of CN201720493255.5 " it is a kind of from
The dynamic loudspeaker for adjusting volume ", a kind of loudspeaker of automatic regulating volume, the swivel plate right side is provided with rot, described
Rot lower part is provided with lower part control panel, and lower part control panel lower part is provided with information current line, the information current line
Lower part is provided with processor, is provided with automatic inductor on the left of the support, the automatic inductor upper left quarter is provided with
Level signal lamp lattice, the level signal lamp lattice top are provided with battery case, and the portable mouth upper right quarter is provided with the device that quiets down, institute
It states the device top that quiets down and is provided with music storage, the switch top is provided with speaker.The utility model is sent by setting breath
Device, sliding ball, slip draw-in groove, turntable, rotation clamping lock and message handler, solve original technology cannot 360 degree to equipment
Automatically adjust loudspeaker plate.By being provided with motherboard, fixed plate, connecting line, sound inductive probe and audio connector, solve
Loudspeaker of having determined cannot control in time, the bad situation of result of broadcast.
For above-mentioned utility model during specific implementation, speaker and radio reception device hypotelorism, human ear is at a distance from speaker
Farther out, the volume that the volume from human ear of radio reception device are heard is different, therefore the adjusting of above-mentioned utility model can have biggish error,
Especially in biggish Conference Hall, speaker volume cannot change according to the variation of the environmental volume size of audience's generation, be not easy to
The use and adjusting of user.
Utility model content
1. technical problems to be solved
Aiming at the problems existing in the prior art, the purpose of this utility model is to provide a kind of automatic negative-feedback volumes to expand
System for electrical teaching, student area sound pickup sensor and the speaker that amplifies are separated from each other by it, and student area sound pickup sensor can be made to pick up
It is that the speaker that amplifies is transmitted to the volume in student area, greatly reduces the error of volume adjustment, this system can will amplifies loudness control
In optimum range, hearer is enable not hear comfortably, improves learning effect, avoid damage to hearing.
2. technical solution
To solve the above problems, the utility model adopts the following technical scheme.
A kind of automatic negative-feedback volume public address system, including Conference Hall, the Conference Hall front end are fixedly connected with dais, institute
It states dais upper end and is fixedly connected with audio processor host, the outer end signal of the audio processor host is connected with furred ceiling Mike
Wind, the outer end signal of the furred ceiling microphone are connected with the speaker that amplifies, and audio processor host outer end is equipped with student area pickup
Sensor, the student area sound pickup sensor outer end are electrically connected with sound feedback module, the sound feedback module and audio
Processor host is electrically connected, and ambient sound acquisition module is electrically connected in the Conference Hall, and the ambient sound acquires mould
Block outer end is equipped with sound conveyor, and the sound conveyor and audio processor host are electrically connected, compared to the prior art in,
To volume adjustment there are the mode of large error, student area sound pickup sensor and the speaker that amplifies are separated from each other by the utility model,
Can make that student area sound pickup sensor picks up is that the speaker that amplifies is transmitted to the volume in student area, greatly reduces volume adjustment
Error, this system can will amplify loudness control in optimum range, so that hearer is not heard comfortably, improve learning effect, avoid
Damage hearing.
Further, the furred ceiling microphone is located at 0.5-1 meters before dais of position, and furred ceiling microphone is apart from ground height
2.3-3 meters of degree, with horizontal plane angle at 30-45 degree, convenient for preferably the sound of teacher is collected and is amplified.
Further, the number of the speaker that amplifies is four, and the speaker that amplifies described in four is evenly distributed in Conference Hall
Upper end wall, by the effect of multiple speakers that amplify, the various pieces that voice signal can be uniformly transmitted in Conference Hall,
The speaker that amplifies is apart from ground 2.2-2.5 meters, and with horizontal plane angle at 15-30 degree, the speaker that makes to amplify is located at higher position, reduces
It touches student and generates the possibility of injury to student.
Further, the number of student area sound pickup sensor is two, two student area sound pickup sensors point
It is not distributed in the left and right ends of Conference Hall, two student area sound pickup sensors are each attached to the inner end wall of Conference Hall, pass through
The wave volume that student area sound pickup sensor can be transmitted to student area to furred ceiling microphone detects, convenient for passing through student area
Student hears that the size of the wave volume for the speaker broadcasting that amplifies is adjusted in the size of volume.
Further, student area sound pickup sensor is located at the upper end wall of Conference Hall or is hung on apart from ground level
2.5-3.5 meters of position, the volume for enabling student area sound pickup sensor to be transmitted to student area to the speaker that amplifies carry out better
It collects and tests.
Further, the number of the ambient sound acquisition module is six, and six ambient sound acquisition modules are equal
Even is distributed in Conference Hall, and the comprehensive ambient sound in Conference Hall of ambient sound acquisition module is enable to adopt
Collection reduces the error of environmental volume acquisition.
3. beneficial effect
Compared with the prior art, utility model has the advantages that
(1) this programme compared to the prior art in: to volume adjustment there are the mode of large error, the utility model will be learned
Raw area's sound pickup sensor is separated from each other with the speaker that amplifies, and can make that student area sound pickup sensor picks up is that the speaker that amplifies transmits
To the volume in student area, the error of volume adjustment is greatly reduced, this system can will amplify loudness control in optimum range, make to listen
Person can not hear comfortably, improve learning effect, avoid damage to hearing.
(2) furred ceiling microphone is located at 0.5-1 meters before dais of position, and furred ceiling microphone is apart from 2.3-3 meters of ground level,
With horizontal plane angle at 30-45 degree, convenient for preferably the sound of teacher is collected and is amplified.
(3) amplify speaker number be four, four speakers that amplify are evenly distributed in the upper end wall of Conference Hall, by more
The effect of a speaker that amplifies, the various pieces that voice signal can be uniformly transmitted in Conference Hall, the speaker distance that amplifies ground
Face 2.2-2.5 meters, with horizontal plane angle at 15-30 degree, the speaker that makes to amplify is located at higher position, and reduction touches student and to
The possibility of the raw injury of production.
(4) number of student area sound pickup sensor is two, and Liang Ge student area sound pickup sensor is respectively distributed to Conference Hall
Left and right ends, Liang Ge student area sound pickup sensor is each attached to the inner end wall of Conference Hall, passes through student area sound pickup sensor energy
Enough wave volumes for being transmitted to student area to furred ceiling microphone detect, convenient for hearing the size of volume by student Qu Xuesheng
The size of the wave volume for the speaker broadcasting that amplifies is adjusted.
(5) student area sound pickup sensor is located at the upper end wall of Conference Hall or is hung on apart from 2.5-3.5 meters of ground level
Position, the volume for enabling student area sound pickup sensor to be transmitted to student area to the speaker that amplifies preferably collect and test.
(6) number of ambient sound acquisition module is six, and six ambient sound acquisition modules are evenly distributed in report
In the Room, the comprehensive ambient sound in Conference Hall of ambient sound acquisition module is enable to be acquired, reduces environmental volume
The error of acquisition.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the utility model；
Fig. 2 is system structure diagram when the utility model is used；
Fig. 3 is the system structure diagram of the utility model ambient sound acquisition.
Figure label explanation:
1 Conference Hall, 2 audio processor hosts, 3 furred ceiling microphones, 4 amplify speaker, 5 student area sound pickup sensors, 6 environment
Sound acquisition module.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe；Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment, based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
In the description of the present invention, it should be noted that term " on ", "lower", "inner", "outside", " top/bottom end " etc.
The orientation or positional relationship of instruction is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description the utility model
It is described with simplifying, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation structure
It makes and operates, therefore should not be understood as limiting the present invention.In addition, term " first ", " second " are only used for description mesh
, it is not understood to indicate or imply relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " being provided with ", " be arranged/connect ", " connection " etc., shall be understood in a broad sense, such as " connection ", may be a fixed connection, can also be with
It is to be detachably connected, or be integrally connected；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, it can also be with
Indirectly connected through an intermediary, it can be the connection inside two elements.For the ordinary skill in the art, may be used
The concrete meaning of above-mentioned term in the present invention is understood with concrete condition.
Embodiment 1:
A kind of automatic negative-feedback volume public address system, referring to Fig. 1, including Conference Hall 1,1 front end of Conference Hall is fixedly connected
There is dais, dais upper end is fixedly connected with audio processor host 2, and the outer end signal of audio processor host 2 is connected with furred ceiling wheat
Gram wind 3, audio processor host 2 is the extremely powerful host of a processing capacity, can be by the received audio of furred ceiling microphone 3
It is packaged into network data by the interface box of audio processor host, by passing through net after the completion of audio processor host process again
Network is sent in the speaker that amplifies and replays, this kind of audio processor host 2 is mainly used in large-scale broadcast system or meeting
The places such as the heart；Under the action of furred ceiling microphone 3, the sound of teacher can be collected and voice signal is transferred to audio
In processor host 2, voice signal is amplified in preset range by audio processor host 2, furred ceiling microphone 3, which is located at, to be said
0.8 meter of position before platform, and furred ceiling microphone 3, apart from 3 meters of ground level, with horizontal plane angle at 30 degree, it is preferably right to be convenient for
The sound of teacher is collected and amplifies, and the outer end signal of furred ceiling microphone 3 is connected with the speaker 4 that amplifies, and the number for the speaker 4 that amplifies is
Four, four speakers 4 that amplify are evenly distributed in the upper end wall of Conference Hall 1, can be by sound under the action of amplifying speaker 4
Signal is uniformly transmitted in Conference Hall 1, connect the student of different location in Conference Hall 1 can to voice signal well
It receives, the speaker 4 that amplifies is apart from 2.3 meters of ground, and with horizontal plane angle at 20 degree, the speaker 4 that makes to amplify is located at higher position, and reduction touches
Student and the possibility that injury is generated to student.
2 outer end of audio processor host is equipped with student area sound pickup sensor 5, application No. is: CN201320588270.X's
Chinese utility model patent discloses " a kind of high sensitivity sound pickup sensor circuit ", the sound pickup sensor 5 in the utility model
Using the highly sensitive sound pickup sensor circuit mentioned in above-mentioned patent, the number of student area sound pickup sensor 5 is two, two
A student area sound pickup sensor 5 is respectively distributed to the left and right ends of Conference Hall 1, and Liang Ge student area sound pickup sensor 5 is each attached to
The inner end wall of Conference Hall 1 can be transmitted to the wave volume in student area by student area sound pickup sensor 5 to furred ceiling microphone 3
It is detected, can hear that the size of volume carries out the size of the wave volume for the broadcasting of speaker 4 that amplifies by student Qu Xuesheng
It adjusts, student area sound pickup sensor 5 is located at the upper end wall of Conference Hall 1, enables student area sound pickup sensor 5 to the speaker 4 that amplifies
The volume for being transmitted to student area preferably collect and test, sound pickup sensor will pass through instrument calibration, and sensitivity error exists
±1dB。
Sound pickup sensor 5 outer end in student area is electrically connected with sound feedback module, sound feedback module referring to FIG. 1-2,
It is electrically connected with audio processor host 2, the student Qu Yinliang that sound feedback module can measure student area sound pickup sensor 5
It feeds back in audio processor host 2, the adjusting by audio processor host 2 to volume, the sound for hearing student is more
It is clear steady, referring to Fig. 3, ambient sound acquisition module 6 is electrically connected in Conference Hall 1, application No. is:
The Chinese utility model patent of CN201721311161.8 discloses " a kind of orientation collection sound translator ", the sound in the utility model
Sound acquisition module can be improved the sensitive of ambient sound acquisition module using the sound acquisition module mentioned in above-mentioned utility model
Degree, convenient for assisting acquisition of the utility model to ambient sound, ambient sound acquisition module 6 by the ambient sound acquisition module
Outer end is equipped with sound conveyor, and sound conveyor and audio processor host 2 are electrically connected, in ambient sound acquisition module 6
Under effect, the wave volume in environment in Conference Hall 1 can be acquired, and audio processor host 2 is to environmental volume
Preset value is arranged in decibel size in advance, when 1 environmental volume of Conference Hall is larger than the preset value of setting, audio processor host
2 improve loudness preset values, and the sound for the releasing of speaker 4 that makes to amplify accordingly becomes larger, when 1 environmental volume of Conference Hall is smaller than preset value,
Audio processor host 2 reduces loudness preset value, and the sound for the releasing of speaker 4 that makes to amplify accordingly becomes smaller, and can provide most for student
Good acoustic information receives environment, and the number of ambient sound acquisition module 6 is six, and six ambient sound acquisition modules 6 are uniform
Be distributed in Conference Hall 1, so that the comprehensive ambient sound in Conference Hall 1 of ambient sound acquisition module 6 is adopted
Collection reduces the error of environmental volume acquisition.
When the utility model is used, by the furred ceiling microphone 3 that is fixed on 1 upper end wall of Conference Hall by the sound of teacher
Information is converted into electric signal, by audio processor host 2 to the signal amplification of electric signal, feedback inhibition, noise suppressed, reverberation
After the function treatments such as inhibition, audio frequency power amplifier, then by the speaker 4 that amplifies transmission of sound signals is come out, staff is to this reality
When with novel being debugged, the loudness preset value of the speaker 4 that amplifies is arranged are as follows: 75-78dB, while by ambient sound standard setting
Are as follows: 20dB, when ambient sound is in the error range of standard, and sound source teacher's spoken sounds are bigger, student area, pickup area
Loudness is more than 75-78dB, and student area sound pickup sensor pickoff signals return to host-processor, and the automatic volume that reduces is to loudness
75-78dB, when sound source teacher's spoken sounds are smaller, pickup area student area loudness is less than 75-78dB, student area pickup sensing
Device pickoff signals return to host-processor, and volume is turned up, and arrive loudness 75-78dB；6 pairs of ambient sound acquisition module reports simultaneously
The sound for accusing environment in the Room 1 is monitored in real time, when ambient sound acquisition module 6, which monitors ambient sound, is more than 20dB, sound
The loudness preset value for the speaker 4 that amplifies is turned up to 83-85dB automatically for frequency processor host 2, in the state that environment is more noisy,
Other classmates can not hear the sound spread out of from the speaker 4 that amplifies yet, when ambient sound acquisition module 6 monitors ambient sound not
When more than 20dB, audio processor host 2 automatically turns down the loudness preset value for the speaker 4 that amplifies to 68-71dB, environment more
In quiet situation, the wave volume that student can be made to hear more is suitable for, compared to the prior art in: exist to volume adjustment
Student area sound pickup sensor and the speaker that amplifies are separated from each other by the mode of large error, the utility model, can make student Qu Shi
What sound sensor picked up is that the speaker that amplifies is transmitted to the volume in student area, greatly reduces the error of volume adjustment, this system
The loudness that can will amplify control enables hearer not hear comfortably in optimum range, improves learning effect, avoids damage to hearing.
The preferable specific embodiment of the above, only the utility model；But the protection scope of the utility model is not
It is confined to this.Anyone skilled in the art is within the technical scope disclosed by the utility model, practical according to this
Novel technical solution and its improvement design is subject to equivalent substitution or change, should all cover in the protection scope of the utility model
It is interior.
Claims (6)
1. a kind of automatic negative-feedback volume public address system, including Conference Hall (1), Conference Hall (1) front end, which is fixedly connected with, to be said
Platform, the dais upper end are fixedly connected with audio processor host (2), the outer end signal connection of audio processor host (2)
Have furred ceiling microphone (3), the outer end signal of the furred ceiling microphone (3) is connected with the speaker that amplifies (4), it is characterised in that: the sound
Frequency processor host (2) outer end is equipped with student area sound pickup sensor (5), and the student area sound pickup sensor (5) outer end electrically connects
It is connected to sound feedback module, the sound feedback module and audio processor host (2) are electrically connected, in the Conference Hall (1)
It is electrically connected with ambient sound acquisition module (6), ambient sound acquisition module (6) outer end is equipped with sound conveyor, described
Sound conveyor and audio processor host (2) are electrically connected.
2. a kind of automatic negative-feedback volume public address system according to claim 1, it is characterised in that: the furred ceiling microphone
(3) be located at 0.5-1 meters of position before dais, and furred ceiling microphone (3) is apart from 2.3-3 meters of ground level, with horizontal plane angle at
30-45 degree.
3. a kind of automatic negative-feedback volume public address system according to claim 1, it is characterised in that: the speaker that amplifies
(4) number is four, and the speaker (4) that amplifies described in four is evenly distributed in the upper end wall of Conference Hall (1), the speaker that amplifies
(4) apart from ground 2.2-2.5 meters, with horizontal plane angle at 15-30 degree.
4. a kind of automatic negative-feedback volume public address system according to claim 1, it is characterised in that: student area pickup
The number of sensor (5) is two, and two student area sound pickup sensors (5) are respectively distributed to the left and right two of Conference Hall (1)
End, two student area sound pickup sensors (5) are each attached to the inner end wall of Conference Hall (1).
5. a kind of automatic negative-feedback volume public address system according to claim 1 or 4, it is characterised in that: the student area
Sound pickup sensor (5) is located at the upper end wall of Conference Hall (1) or is hung on the position apart from 2.5-3.5 meters of ground level.
6. a kind of automatic negative-feedback volume public address system according to claim 1, it is characterised in that: the ambient sound is adopted
The number for collecting module (6) is six, and six ambient sound acquisition modules (6) are evenly distributed in Conference Hall (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920563241.5U CN209710318U (en) | 2019-04-24 | 2019-04-24 | A kind of automatic negative-feedback volume public address system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920563241.5U CN209710318U (en) | 2019-04-24 | 2019-04-24 | A kind of automatic negative-feedback volume public address system |
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| Publication Number | Publication Date |
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| CN209710318U true CN209710318U (en) | 2019-11-29 |
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ID=68648920
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| CN201920563241.5U Active CN209710318U (en) | 2019-04-24 | 2019-04-24 | A kind of automatic negative-feedback volume public address system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111757235A (en) * | 2020-06-15 | 2020-10-09 | 杭州艾力特数字科技有限公司 | Sound expansion system with classroom language definition measuring function |
| CN114724319A (en) * | 2021-01-04 | 2022-07-08 | 中国石油化工股份有限公司 | System and method for intelligently adjusting alarm volume and frequency of well site |
-
2019
- 2019-04-24 CN CN201920563241.5U patent/CN209710318U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111757235A (en) * | 2020-06-15 | 2020-10-09 | 杭州艾力特数字科技有限公司 | Sound expansion system with classroom language definition measuring function |
| CN114724319A (en) * | 2021-01-04 | 2022-07-08 | 中国石油化工股份有限公司 | System and method for intelligently adjusting alarm volume and frequency of well site |
| CN114724319B (en) * | 2021-01-04 | 2024-01-30 | 中国石油化工股份有限公司 | System and method for intelligently adjusting alarm volume and frequency of well site |
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