CN203368759U - Indoor sound amplifying and recording device - Google Patents
Indoor sound amplifying and recording device Download PDFInfo
- Publication number
- CN203368759U CN203368759U CN 201320336252 CN201320336252U CN203368759U CN 203368759 U CN203368759 U CN 203368759U CN 201320336252 CN201320336252 CN 201320336252 CN 201320336252 U CN201320336252 U CN 201320336252U CN 203368759 U CN203368759 U CN 203368759U
- Authority
- CN
- China
- Prior art keywords
- array
- sound
- matrix
- pick
- output
- 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.)
- Expired - Lifetime
Links
Images
Landscapes
- Circuit For Audible Band Transducer (AREA)
Abstract
The utility model discloses an indoor sound amplifying and recording device which comprises a sound pickup array, an audio processing host, a loudspeaker array and a recording module. The sound pickup array, the loudspeaker array and the recording module are respectively connected with the audio processing host. The sound pickup array is installed on a top part of a room. The coverage range of the loudspeaker array is complementary to the sound pickup range of the sound pickup array. The sound pickup array acquires sound of a keynote speaker. After sound passes through the audio processing host, sound is sent to the loudspeaker array so that sound is outputted. Therefore, areas with poor coverage of sound of the keynote speaker are complemented, and all the audience can listen clearly. The sound pickup array comprises multiple sound pickups. The loudspeaker array comprises multiple loudspeakers. Array type sound pickup and loudspeaker devices are adopted so that the position of the keynote speaker can be accurately positioned and a balanced sound coverage effect is provided. The recording module records and stores sound signals which can be used for recorded broadcasting, self-study, reviewing, etc. The indoor sound amplifying and recording device is suitable for environments like classrooms, meeting places, etc.
Description
Technical field
The utility model relates to the acoustic processing amplification sector, especially relates to a kind of indoor public address sound pick-up outfit that is applied to the environment such as classroom, meeting-place.
Background technology
Teacher is dynamic in the classroom process of giving lessons, the scope of giving lessons is movable, traditional hard-wired public address or recording and broadcasting system can't the dynamic tracing teacher activity, the sound of fixing microphone pickup can change according to the variation of teacher's scope of activities, cause very poor of pickup effect, directly affected the making of on-the-spot amplifying effect and later stage audio frequency courseware, for fear of the problems referred to above, complicated infrared induction system seizure teacher's active state often will be installed in the teacher, this had both affected the environment in classroom, and 2 cover systems interconnect also very complicated, need special messenger's periodic maintenance, for fear of similar problem along with the up-to-date wireless portable pick-up of the development of wireless technology also is applied in classroom public address, recorded broadcast field widely, but this has brought again the trouble of management: portable equipment needs the personal management, attend class and lend, give back after class, periodic charge, and the pick-up of carrying also is very easy to because artificial reason is damaged, consider that the life-span of battery and the general portable pick-up of service condition of equipment only have 2 years useful life, within namely every 2 years, will change primary equipment, this has also caused very large waste.
State Intellectual Property Office of the People's Republic of China discloses the patent documentation that publication No. is CN102082989A on 06 01st, 2011, title is a kind of all-digital wireless public-address system of the teaching based on Zigbee protocol, and it comprises transmitting terminal and receiving terminal; The ZigBee sending module that described transmitting terminal comprises microphone and is connected with microphone; Described receiving terminal comprises Zigbee receiver module, audio decoding circuit, audio amplifier circuit and loudspeaker, and the ZigBee receiver module is connected with loudspeaker successively after audio decoding circuit, audio amplifier circuit; Described ZigBee sending module and the wireless connections of ZigBee receiver module.This scheme connects pick-up and amplifying circuit by wireless mode, deficiencies such as still existing and manage inconvenience, easily damage, useful life is limited.
Summary of the invention
The utility model be mainly solve that the existing pickup effect of prior art is poor, management inconvenience, easily damage, useful life is limited etc. technical problem, provide a kind of pickup effect good, arranged after without extra administering and maintaining, the indoor public address sound pick-up outfit of not fragile, long service life.
The utility model is mainly solved by following technical proposals for above-mentioned technical problem: a kind of indoor public address sound pick-up outfit, comprise pick-up array, audio frequency processing host, loudspeaker array and recording module, described pick-up array, loudspeaker array and recording module are connected with described audio frequency processing host respectively, described pick-up array is arranged on the top in room, the pickup scope complementation of the coverage of described loudspeaker array and pick-up array.
The pick-up array gathers speaker's sound, after processing by the audio frequency processing host, sends to loudspeaker array output, makes up the zone that speaker's sound can not well cover, and all audiences can clearly be paid attention to the class.The pick-up array comprises several pick-ups, and loudspeaker array comprises several loud speakers, adopts the pickup of array and the equipment of raising one's voice can accurately locate speaker's position and balanced sound coverage effect is provided.Recording module is recorded preservation by voice signal, can be for recorded broadcast, review one's lessons, review etc.
As preferably, described audio frequency processing host comprises controlled input matrix, intelligent acquisition module, audio analysis module, DSP processing module and the controlled output matrix connected successively, described controlled input matrix is connected with the pick-up array, described controlled output matrix is connected with loudspeaker array, and recording module connects the DSP processing module.
As preferably, described recording module comprises input matrix, A/D convertor circuit, encoder and the memory cell connected successively, and described input matrix also is connected with the DSP processing module.
As preferably, described intelligent acquisition module comprises filter circuit, microphone amplifying circuit, Dolby circuit, automatic gain control circuit and the pressure limiting circuit connected successively, described filter circuit also is connected with controlled input matrix, and the output of described pressure limiting circuit connects the audio analysis module.
As preferably, described controlled input matrix comprises input route matrix and the first volume control unit, the input of described input route matrix connects the pick-up array, the output of described input route matrix connects the first volume control unit, and the output of described the first volume control unit connects the intelligent acquisition module; Described input route matrix all is connected the DSP processing module by control bus with the first volume control unit.
Described route matrix can be adjusted pick-up array quantity and the Selective sequence of input intelligent acquisition module as required.
As preferably, described controlled output matrix comprises output route matrix and the second volume control unit, the input of described output route matrix connects the audio output of DSP processing module, the output of described output route matrix connects the second volume control unit, and described the second volume control unit also connects loudspeaker array; Described output route matrix all is connected the DSP processing module by control bus with the second volume control unit.
Described route matrix can adjust as required input DSP processing module voice frequency link quantity and Selective sequence.
The built-in high speed voice processing unit of controlled input matrix, the two-stage DNR dynamic noise reduction is processed and is automatically regulated AGC and the DTS de-noising signal micro-processor interface circuit of high strength sound and moment impact sound and can thoroughly eliminate the dynamic closed loop inhibition of the electronic noise circuit of " neighing " electronic noise, can provide clear and high-quality audio signal output for the rear class unit module.
The intelligent acquisition module can collect the parameter unit needed and be transported to the audio analysis module from the signal of controlled input matrix output.
The audio analysis module can be analyzed the signal of intelligent acquisition module collection and signal is made to analysis, and analysis result is transported to lower DSP processing module.
The DSP processing module is controlled the output of controlled output matrix according to the result of audio analysis module analysis.
The beneficial effect that the utility model brings is, both had cost and managerial advantage that fixed installation brings, without the tracking system of external complexity, self can complete the voice tracking function again, can dynamically adjust according to teacher's activity, realize good public address, recorded broadcast effect.
The accompanying drawing explanation
Fig. 1 is a kind of indoor public address sound pick-up outfit structural representation of the present utility model;
Fig. 2 is a kind of recording module circuit block diagram of the present utility model;
Fig. 3 is a kind of intelligent acquisition modular circuit block diagram of the present utility model;
Fig. 4 is a kind of controlled input matrix circuit block diagram of the present utility model;
Fig. 5 is a kind of controlled output matrix circuit block diagram of the present utility model;
Fig. 6 is that a kind of indoor sound amplifier of the present utility model position arranges schematic diagram;
Fig. 7 is that the method for adjustment flow chart followed the trail of in a kind of voice of the present utility model;
In figure: 1, the pick-up array, 2, the audio frequency processing host, 3, loudspeaker array, 4, recording module, 21, controlled input matrix, 22, the intelligent acquisition module, 23, the audio analysis module, 24, the DSP processing module, 25, controlled output matrix, 41, input matrix, 42, A/D convertor circuit, 43, encoder, 44, memory cell, 221, filter circuit, 222, the microphone amplifying circuit, 223, Dolby circuit, 224, automatic gain control circuit, 225, pressure limiting circuit, 211, the input route matrix, 212, the first volume control unit, 251, the output route matrix, 252, the second volume control unit.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment: a kind of indoor sound amplifier of the present embodiment, as shown in Figure 1, comprise pick-up array 1, audio frequency processing host 2, loudspeaker array 3 and recording module 4, described pick-up array 1, loudspeaker array 3 and recording module 4 are connected with described audio frequency processing host 2 respectively.Audio frequency processing host 2 comprises controlled input matrix 21, intelligent acquisition module 22, audio analysis module 23, DSP processing module 24 and the controlled output matrix 25 connected successively, described controlled input matrix 21 is connected with pick-up array 1, described controlled output matrix 25 is connected with loudspeaker array 3, and recording module 4 connects DSP processing module 24.
As shown in Figure 2, recording module 4 comprises input matrix 41, A/D convertor circuit 42, encoder 43 and the memory cell 44 connected successively, and input matrix 41 also is connected with DSP processing module 24.
As shown in Figure 3, intelligent acquisition module 22 comprises filter circuit 221, microphone amplifying circuit 222, Dolby circuit 223, automatic gain control circuit 224 and the pressure limiting circuit 225 connected successively, filter circuit 221 also is connected with controlled input matrix 21, and the output of pressure limiting circuit 225 connects audio analysis module 23.
As shown in Figure 4, controlled input matrix 21 comprises input route matrix 211 and the first volume control unit 212, the input of input route matrix 211 connects pick-up array 1, the output of input route matrix 211 connects the filter circuit 221 of the output connection intelligent acquisition module 22 of the first volume control unit 212, the first volume control units 212; Input route matrix 211 all is connected DSP processing module 24 by control bus with the first volume control unit 212.
As shown in Figure 5, controlled output matrix 25 comprises output route matrix 251 and the second volume control unit 252, the input of output route matrix 251 connects the audio output of DSP processing module 24, the output of output route matrix 251 connects the second volume control unit 252, the second volume control units 252 and also connects loudspeaker array 3; Output route matrix 251 all is connected DSP processing module 24 by control bus with the second volume control unit 252.
Pick-up array 1 is arranged on the top in classroom, the pickup scope of the coverage of loudspeaker array and pick-up array.(length/width/height in classroom is respectively complementary standard classroom: 8.9/7.9/3.3M) tested, test sound audio frequency is respectively 250,500,1000Hz, in dead ahead, dais, classroom, 1 ~ 8 meter attenuation with tiltedly 1 ~ 8 meter propagation in the place ahead is approximately front 3 meters 5db/m, and being greater than 3 meters is 2db/m.The ordinary people speaks loudness at 45db ~ 60db, the normal person can be comfortable the loudness lower limit of listening attentively at 20 ~ 30db, the scope that in classroom, teacher's direct sound wave can clear transmission is to take the round area that dais is 3 ~ 5 meters of center of circle radiuses, and our large this scope definition is " direct sound wave give lessons zone ".Zone definitions beyond this scope is " benefit sound give lessons zone ".As shown in Figure 6, the dotted line frame is the teachers' instruction district in the laying of loudspeaker array and pick-up array, and circle is the pick-up setting position, and rectangle is the loud speaker setting position.Arrange and form loudspeaker array by a plurality of microphones in benefit sound is given lessons zone, in order not make the local sound intensity excessive, each power of loudspeaker is controlled between 3 ~ 8W, guarantee that the loudness of every loud speaker output is at 45db ~ 50db, the effective coverage range of each loud speaker is the round area of 3 meters of radiuses like this, can configure loud speaker according to mentioned above principle according to actual size and the external environment condition in classroom.Even so covered and also can not think that reflective effect, sound field keep even by 2 loud speaker effective coverage ranges because the distance between the loud speaker to any nearest is less than 3 meters simultaneously.Sound pick up equipment has been made curing for effective pickup scope when dispatching from the factory simultaneously, it is approximately the round area of 5 meters of radiuses, just in time can cover the direct sound wave zone of giving lessons, configuration makes when loud speaker sound field not cover the direct sound wave zone of giving lessons, can make so several of direct sound field and benefit not overlapping, improve whole sound field environment.
Top, classroom above teacher's the zone of mainly giving lessons is installed highly sensitive pick-up pickup scope and is covered the direct sound wave zone of giving lessons, and in the benefit sound zone of giving lessons, uses uniformly loudspeaker array, and sound field covers the benefit sound zone of giving lessons.Be that the sound field of loudspeaker array does not cover sound that microphone pickup scope guarantees that loud speaker sends and can not gathered and amplify to produce to clamor by 2 times and cry, the sound field of loudspeaker array does not cover teacher's direct sound wave effective coverage range, avoid the overlapping echogenicity effect of sound field, in the scope assurance classroom beyond the sound field uniform fold teacher direct sound wave effective coverage range of loudspeaker array, all students can hear teacher's teaching content clearly.
Method of adjustment followed the trail of in a kind of voice, as shown in Figure 7, comprises the following steps:
Step 1, by the pick-up array, gather indoor voice signal, input audio analysis module after the intelligent acquisition module, find out 2 pick-ups nearest apart from sound source as the useful signal input source by the mode of intelligent screening, find out apart from sound source 1 pick-up farthest as the reference signal input sources;
Step 2, by the mode of intelligent audio mixing, process effective input signal;
Step 3, the mode relatively of passing through are filtered the ambient sound in effective input signal; Signal after filtration is as effective source of sound input recording module;
Step 4: controlled output matrix is dynamically adjusted according to selected effective input pick-up;
Step 5: the result of adjustment is exported by loudspeaker array.
The mode of intelligent screening be exactly by the mode of volume comparison select collect the direct sound wave maximum 2 pick-ups as the useful signal input source, 1 pick-up of direct sound wave minimum is as the reference signal input sources.
The explanation sound that direct sound wave sends for the teacher who teaches.
Jiu Shi the mode of intelligence audio mixing is done weighted sum according to volume to 2 pick-ups, the volume of picking up as the A pick-up is A, and the volume that the B pick-up is picked up is B, Zong volume is A*A/(A+B so)+B*B/(A+B).
The unit of A and B is decibel (dB).
Ambient sound filters the specific implementation way: the signal of suppose collection of useful signal input source comprises teacher's direct sound wave A, the direct sound wave b of loudspeaker, the ambient sound C1 at scene, and the signal of reference signal input source collection comprises the direct sound wave B of direct sound wave a, loudspeaker, on-the-spot ambient sound C2, wherein A and a, B and b, C1 and C2 have correlation, by setting up Mathematical Modeling, and constantly revise the coefficient of filter, and making A and a, B and b, C1 and C2 are more close; Then, will in the signal of effect signal input sources collection, deduct b and C1, thereby and A be done and strengthens the purpose that reaches the ambient sound filtration.
Filter D SP realizes comprising high-pass filtering (being greater than 5KHz), low-pass filtering (being less than 100Hz) and dynamic filter (noise filtering), dynamic filter (constantly revising filter coefficient) is exactly that white noise to fixed frequency is filtered, and the filtering algorithm based on pink noise adopts the binary approximate data of standard.
The way that A is strengthened is: suppose to become A1 after A strengthens, A1*A1=A*A+a*a.
Controlled output matrix is carried out dynamically adjusting and comprise the output of the loud speaker of selected effective input pick-up near distance is done and decayed and lifting is done in the output of the loud speaker far away of adjusting the distance.
Decay and lifting amplitude are determined according to preset template.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various modifications or supplement or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Although this paper has more been used the terms such as pick-up array, audio mixing, screening, do not get rid of the possibility of using other term.Using these terms is only in order to describe more easily and explain essence of the present invention; They are construed to any additional restriction is all contrary with spirit of the present invention.
Claims (6)
1. an indoor public address sound pick-up outfit, it is characterized in that, comprise pick-up array, audio frequency processing host, loudspeaker array and recording module, described pick-up array, loudspeaker array and recording module are connected with described audio frequency processing host respectively, described pick-up array is arranged on the top in room, the pickup scope complementation of the coverage of described loudspeaker array and pick-up array.
2. indoor public address sound pick-up outfit according to claim 1, it is characterized in that, described audio frequency processing host comprises controlled input matrix, intelligent acquisition module, audio analysis module, DSP processing module and the controlled output matrix connected successively, described controlled input matrix is connected with the pick-up array, described controlled output matrix is connected with loudspeaker array, and recording module connects the DSP processing module.
3. indoor public address sound pick-up outfit according to claim 1, is characterized in that, described recording module comprises input matrix, A/D convertor circuit, encoder and the memory cell connected successively, and described input matrix also is connected with the DSP processing module.
4. indoor public address sound pick-up outfit according to claim 2, it is characterized in that, described intelligent acquisition module comprises filter circuit, microphone amplifying circuit, Dolby circuit, automatic gain control circuit and the pressure limiting circuit connected successively, described filter circuit also is connected with controlled input matrix, and the output of described pressure limiting circuit connects the audio analysis module.
5. according to the described indoor public address sound pick-up outfit of claim 2 or 4, it is characterized in that, described controlled input matrix comprises input route matrix and the first volume control unit, the input of described input route matrix connects the pick-up array, the output of described input route matrix connects the first volume control unit, and the output of described the first volume control unit connects the intelligent acquisition module; Described input route matrix all is connected the DSP processing module by control bus with the first volume control unit.
6. indoor public address sound pick-up outfit according to claim 5, it is characterized in that, described controlled output matrix comprises output route matrix and the second volume control unit, the input of described output route matrix connects the audio output of DSP processing module, the output of described output route matrix connects the second volume control unit, and described the second volume control unit also connects loudspeaker array; Described output route matrix all is connected the DSP processing module by control bus with the second volume control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320336252 CN203368759U (en) | 2013-06-13 | 2013-06-13 | Indoor sound amplifying and recording device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320336252 CN203368759U (en) | 2013-06-13 | 2013-06-13 | Indoor sound amplifying and recording device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203368759U true CN203368759U (en) | 2013-12-25 |
Family
ID=49816470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320336252 Expired - Lifetime CN203368759U (en) | 2013-06-13 | 2013-06-13 | Indoor sound amplifying and recording device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203368759U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105142089A (en) * | 2015-06-25 | 2015-12-09 | 厦门一心智能科技有限公司 | Onsite classroom pickup and loudspeaking system adapted to position of a speaker |
| CN105280191A (en) * | 2015-10-09 | 2016-01-27 | 北京竞业达数码科技有限公司 | Network audio mixing method and device |
| WO2018098889A1 (en) * | 2016-06-30 | 2018-06-07 | 广东美的制冷设备有限公司 | Inter-device grouping method and apparatus |
| CN112911482A (en) * | 2021-03-15 | 2021-06-04 | 世邦通信股份有限公司 | System and method for automatically adjusting sound amplification area and area volume |
-
2013
- 2013-06-13 CN CN 201320336252 patent/CN203368759U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105142089A (en) * | 2015-06-25 | 2015-12-09 | 厦门一心智能科技有限公司 | Onsite classroom pickup and loudspeaking system adapted to position of a speaker |
| CN105142089B (en) * | 2015-06-25 | 2016-05-18 | 厦门一心智能科技有限公司 | A kind of on-the-spot pickup in classroom and sound reinforcement system of position that can self adaptation speaker |
| CN105280191A (en) * | 2015-10-09 | 2016-01-27 | 北京竞业达数码科技有限公司 | Network audio mixing method and device |
| WO2018098889A1 (en) * | 2016-06-30 | 2018-06-07 | 广东美的制冷设备有限公司 | Inter-device grouping method and apparatus |
| CN112911482A (en) * | 2021-03-15 | 2021-06-04 | 世邦通信股份有限公司 | System and method for automatically adjusting sound amplification area and area volume |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103414988B (en) | Method of adjustment followed the trail of in a kind of indoor public address sound pick-up outfit and voice | |
| CN203368759U (en) | Indoor sound amplifying and recording device | |
| CN205408099U (en) | Mobile terminal with function of making an uproar is fallen | |
| CN103414990A (en) | Method for detecting indoor sound reinforcement device | |
| CN103428607A (en) | Audio signal playing system and electronic device | |
| CN105592394A (en) | High-sensitivity pickup and directional sound amplifying device and method thereof | |
| CN209710318U (en) | A kind of automatic negative-feedback volume public address system | |
| CN102547545A (en) | Device and method for amplifying classroom sound | |
| CN218006518U (en) | Infrared sound amplification device for intelligent teaching | |
| US9171537B2 (en) | Apparatus and method for cancelling, reducing and modulating noise signal and for signal enhancing and signal proofing | |
| CN202475732U (en) | Classroom sound enhancing device | |
| CN217509039U (en) | Hall pickup sound amplification system | |
| CN207505123U (en) | A kind of teaching pick up facility and system | |
| CN108322865A (en) | A kind of teaching private classroom speaker unit and application method | |
| CN207968840U (en) | A kind of circular audio devices of 3D | |
| CN204598296U (en) | Whole scene intelligence sound console | |
| JPH01158899A (en) | Acoustic broadcast system | |
| CN214315522U (en) | Multifunctional electrified education active loudspeaker system | |
| CN203675288U (en) | Infrared-ray wireless hearing multimedia teaching system and headset | |
| CN2256610Y (en) | Background noise silencer for voice receiving system | |
| CN217428280U (en) | Directional intercom device | |
| CN218450532U (en) | Intelligent sound amplifying system | |
| CN110650423B (en) | Intelligent classroom sound control system | |
| CN216643876U (en) | Classroom eyeshield lamp with megaphone | |
| CN204578761U (en) | A kind of voice output system with noise analysis device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Indoor sound reinforcement recording device and voice tracking adjustment method Effective date of registration: 20141209 Granted publication date: 20131225 Pledgee: Bank of Hangzhou Limited by Share Ltd. science and Technology Branch Pledgor: LINKER DIGITAL TECHNOLOGY CO.,LTD. Registration number: 2014330000044 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 310052, Zhejiang, Hangzhou province Binjiang District Long River Street No. 399, No. 3, four, five floor Patentee after: HANGZHOU LINKER TECHNOLOGY CO.,LTD. Address before: Hangzhou City, Zhejiang province Binjiang District 310053 Spring Road No. 1517 Kim Science Park building C Patentee before: LINKER DIGITAL TECHNOLOGY CO.,LTD. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20131225 |
|
| CX01 | Expiry of patent term |