CN202143200U - Variable directive sound box - Google Patents
Variable directive sound box Download PDFInfo
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- CN202143200U CN202143200U CN201120162446U CN201120162446U CN202143200U CN 202143200 U CN202143200 U CN 202143200U CN 201120162446 U CN201120162446 U CN 201120162446U CN 201120162446 U CN201120162446 U CN 201120162446U CN 202143200 U CN202143200 U CN 202143200U
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Abstract
The utility model discloses a variable directive sound box which can realize simultaneous programmable control to radiation direction and radiation angle in both a vertical direction and a horizontal direction of sound reinforcement loudspeaker dot array. The variable directive sound box comprises a digital signal processor, a power amplifier, and a loudspeaker unit dot array, all of which are provided with M*N independent channels. The loudspeaker unit dot array comprises a high frequency cell array and a low frequency cell array which can be in the same line or the same row; the digital signal processor comprises a first gain controller, a first parameter equalizer, a first time delay unit, a frequency divider, a second time delay unit, a second parameter equalizer, and a second gain controller; and the second time delay unit is used for carrying out programmable control delay treatment to loudspeaker unit audio signals entering into all lines and rows of the high frequency cell array and the low frequency cell array respectively.
Description
Technical field
The utility model relates to a kind of directive property audio amplifier of public address loud speaker dot matrix, specifically, relates to a kind of variable directional audio amplifier that can realize the control able to programme of radiation direction on public address loud speaker dot matrix vertical direction and the horizontal direction and angle of radiation simultaneously.
Background technology
In the various halls and the design of venue public address, in order to satisfy high-quality public address application requirements,, need a large amount of loud speaker of design and installation based on the actual needs of performance, still, following situation often appears in implementation process:
One of which, because the decorations requirement of the hall often can not provide enough large-scale audio amplifier groups of space mounting, audio amplifier group or reduce volume, or be installed in some unfavorable positions.As adopt the way of smaller size smaller, can only select the audio amplifier of some smaller powers for use, but be difficult to reach the required sound pressure level requirement of performance; Be installed in unfavorable position like employing, then require the directive property control ability of audio amplifier very strong, so that accurately cover gallery.
Two, have bigger range difference in the audio amplifier group between each audio amplifier, most of frequency range of public address exists a large amount of overlappings to cover, and produces serious dressing filter effect, deterioration tonequality.
Three, each audio amplifier in the audio amplifier group has most ability to project the metope of the hall because the directive property control ability is limited, and warp reflects and the direct sound wave interference, also serious deterioration tonequality, even echogenicity phenomenon.
Four, because the directive property control ability of audio amplifier group is not strong, particularly in low-frequency range, there is lot of energy to be radiated the stage area and gets into the pickup transmitter of stage area, form feedback control loop, be easy to generate the phenomenon of uttering long and high-pitched sounds, influence the public address quality greatly.
In order to improve the directive property control ability of audio amplifier, way commonly used mainly contains two kinds, and the first adopts the bugle mode; Promptly before the driver of loud speaker, add a bugle; The control ability of this mode is limited, and particularly the control ability in low-frequency range is not strong, or requires very big volume; A kind of in addition mode is to adopt loudspeaker array, like common linear array audio amplifier, but can only the controlling level direction or the angle of vertical direction, both direction can not be controlled simultaneously, can not arbitrarily change the radiation direction of looking for array.
In addition, adopt the mode of sound column to realize directive property control in the market in addition, but equally can only controlling level or vertical direction; Can not control both direction simultaneously, and, cause at high band and produce serious interference because the distance between the unit is bigger; Deterioration tonequality; Be not suitable for high-quality public address and use, in the directive property control ability variation of high band, produce very strong secondary lobe simultaneously.
If the distance between two loudspeaker units is d, the frequency of loud speaker radiate sound is f, and its wavelength X=c/f, c are the aerial propagation velocity of sound wave.< during λ/2, the sound field radiating surface after the stack of two-loudspeaker unit has 1 main lobe, does not have the valley point of interference, does not promptly have the comb filtering phenomenon of deterioration tonequality as d.Work as d>λ/2, the sound field radiating surface after the stack of two-loudspeaker unit has a plurality of main lobes, a plurality of capable and experienced Shibuya points; The comb filtering phenomenon that promptly has deterioration tonequality; Radiating surface has 1 main lobe, and 2 capable and experienced Shibuya points are when distance is that 2 λ two-loudspeaker sound fields predict the outcome; Radiating surface has 3 main lobes, 4 capable and experienced Shibuya points.
Present public address sound column mainly contains following two kinds of forms: one of which; Adopt many loudspeaker units to form loud speaker row; Change the delay value between every loudspeaker unit; Can change radiation direction and the angle of radiation of sound column, but the angle of radiation of its horizontal direction and radiation direction fix, can not change in vertical direction.For the sound of playing lower frequency to satisfy the demand of actual public address, the loudspeaker unit size can not be too small, like this; Causing the distance between loudspeaker unit excessive, is example with 4 cun loudspeaker units, can only be controlled at 10.2 centimetres apart from minimum between the loudspeaker unit; With 10.2 centimetres be λ/2, its frequency is 1416 hertz, also being frequency will exist the comb filtering phenomenon greater than 1416 hertz sound; Deterioration tonequality, secondary lobe appears in the directive property variation simultaneously.
They are two years old; Adopt many unit to form loud speaker row (a unit), adopt many bugles to form bugle array (b unit) simultaneously, can change radiation direction and the angle of radiation of sound column equally in vertical direction; But the angle of radiation and the radiation direction of its horizontal direction are fixed, and can not change.A is responsible for the unit playing the sound of low-frequency range, and b is responsible for the unit playing the sound of high band, avoids high frequency because the tonequality deterioration that comb filtering causes.But because the b unit adopts the bugle radiation, each unit itself has than highly directive to be controlled; Purpose is to reduce to overlap to cover; To reduce the comb filtering phenomenon, still, make the angle of radiation of high-frequency sound and radiation direction can not adopt the electronics mode to adjust owing to can not cover jointly; Can only adopt the mode of physics to adjust the angle of radiation and the mode direction of bugle, operation is difficulty.
The utility model content
To above deficiency; The utility model provides a kind of variable directional audio amplifier that can realize the control able to programme of radiation direction on public address loud speaker dot matrix vertical direction and the horizontal direction and angle of radiation simultaneously; Its directive property control ability is strong; Public address tonequality is high, is particularly suitable in the sound system of the various halls and venue.
The variable directional audio amplifier of the utility model comprises:
Be used for the audio signal of input audio amplifier is carried out the digital signal processor of frequency division, gain, equilibrium and delay process;
Be used for the output audio signal of digital signal processor is carried out power amplification, and the power amplifier that drives separate speaker unit;
Be used to play the loudspeaker unit dot matrix of the audio signal after power amplifier is handled;
Said digital signal processor, power amplifier and loudspeaker unit dot matrix all contain M*N autonomous channel; Said digital signal processor comprises the audio signal of the loudspeaker unit of the every row that get into the loudspeaker unit dot matrix is carried out control delay process able to programme respectively; And the audio signal of the loudspeaker unit of every row of getting into the loudspeaker unit dot matrix carried out second delayer of control delay process able to programme respectively, wherein M and N are respectively and are not less than 1 natural number.
Said loudspeaker unit dot matrix can be the high frequency unit array; It also can be the low frequency cell array; Can also be the high frequency unit array mixes dot matrix with the low frequency cell array is formed; Said second delayer carries out control delay process able to programme respectively to the audio signal of the loudspeaker unit of every row of getting into the high frequency unit array and every row, and the audio signal of the loudspeaker unit of every row of getting into the low frequency cell array and every row is carried out control delay process able to programme respectively.
Said loudspeaker unit dot matrix can be high frequency unit array and low frequency cell array at same row, also can be that high frequency unit array and low frequency cell array are in same delegation.
Said digital signal processor comprises:
Be responsible for first gain controller to the Audio Meter adjusting of input;
Be responsible for the audio signal of input is carried out first parametric equalizer that frequency response equalization is handled;
Be responsible for the audio signal of input is carried out first delayer of delay process;
Be responsible for that the audio signal of input is carried out frequency division and handle, simultaneously high-frequency signal is distributed to the output channel 1～N at high frequency unit array place, low frequency signal is distributed to the frequency divider of the output channel N+1～2N at low frequency cell array place;
Be responsible for the audio signal on each output channel is carried out delay process second delayer of the programming Control of the high frequency unit array of realization loud speaker point array element and the radiation direction of low frequency cell array and angle of radiation;
Be responsible for the audio signal on each output channel is carried out second parametric equalizer that frequency response equalization is handled;
Be responsible for second gain controller to Audio Meter adjusting on each output channel.
The utility model carries out the programmable delay processing through delayer respectively to the every row of loudspeaker unit dot matrix (high frequency unit array and low frequency cell array) and the loudspeaker unit of every row; Can realize radiation direction and the control able to programme of angle of radiation on public address loud speaker dot matrix vertical direction and the horizontal direction; Control precision is high; The directive property control ability is strong, and the tonequality that amplifies is good.The loudspeaker unit dot matrix of the utility model adopts by what high frequency unit array and low frequency cell array were formed and mixes dot matrix, the tonequality deterioration that can avoid high frequency to cause owing to dressing filtering.
Description of drawings
Fig. 1 is the variable directional sound box system pie graph of the utility model;
Fig. 2 is the array radiation direction control principle figure of the public address loud speaker dot matrix of the utility model;
Fig. 3 is the array angle of radiation control principle figure of the public address loud speaker dot matrix of the utility model;
Fig. 4 is the control principle figure of the loudspeaker unit dot matrix radiation direction and the angle of radiation of the utility model;
Fig. 5 is system's pie graph of the digital signal processor of the utility model;
Fig. 6 is the sketch map of execution mode one of the public address loud speaker dot matrix of the utility model;
Fig. 7 is the sketch map of execution mode two of the public address loud speaker dot matrix of the utility model;
Fig. 8 is the sketch map of execution mode three of the public address loud speaker dot matrix of the utility model;
Fig. 9 is the variable directional audio amplifier applied environment sketch map of the utility model;
Figure 10 is the radiated sound field sketch map of the variable directional audio amplifier of the utility model;
Figure 11 is the radiated sound field measurement structure sketch map of the variable directional audio amplifier of the utility model.
The embodiment content
Below in conjunction with accompanying drawing the utility model is further set forth,
As shown in Figure 1; The variable directional audio amplifier of the utility model comprises digital signal processor 1, power amplifier 2 and loudspeaker unit dot matrix 3; And digital signal processor 1, power amplifier 2 and loudspeaker unit dot matrix 3 all contain M*N autonomous channel, comprise in the digital signal processor 1 that respectively the loudspeaker unit to the loudspeaker unit of every row of loudspeaker unit dot matrix 3 and every row carries out second delayer of delay process.Wherein, digital signal processor 1 is used for the audio signal of input audio amplifier is carried out frequency division, gain, equilibrium and delay process; Power amplifier 2 is used for the output audio signal of digital signal processor is carried out power amplification, and drives separate speaker unit; Loudspeaker unit dot matrix 3 is used to play the audio signal after power amplifier is handled, and M and N are respectively and are not less than 1 natural number.
The control principle and the method for the radiation direction of the variable directional audio amplifier of the utility model are following: as shown in Figure 2; The audio signal of input is through delayer d1～d8 loudspeaker unit S1～S8 that feeds respectively; When the delay time setting of delayer d1～d8 is respectively 0; Promptly have no time-delay, this moment, the radiation direction by the array that loudspeaker unit S1～S8 forms was F; When the delay time of delayer d1～d8 is set to certain particular value; Make the play position of loudspeaker unit change; Its position becomes S1 '～S8 '; The radiation direction of the array of being made up of loudspeaker unit S1 '～S8 ' is F ', changes the amount of delay of delayer d1～d8, the corresponding change of deflection of radiation angle θ.
The control principle and the method for the variable directional audio amplifier of the utility model are following: as shown in Figure 3; The audio signal of input is through delayer d1～d8 loudspeaker unit S1～S8 that feeds respectively; When the delay time setting of delayer d1～d8 is respectively 0; Promptly have no time-delay, this moment, the angle of radiation by the array that loudspeaker unit S1～S8 forms was θ; When the time-delay of delayer d1～d8 is set to certain particular value; Make the play position of loudspeaker unit change; Its position becomes S1 '～S8 '; The radiation direction of the array of being made up of loudspeaker unit S1 '～S8 ' is θ ', changes the amount of delay of delayer d1～d8, the corresponding change of deflection of radiation angle θ '.
The loudspeaker unit dot matrix of the utility model can be the high frequency unit array; It also can be the low frequency cell array; Can also be the high frequency unit array mixes dot matrix with the low frequency cell array is formed; And the loudspeaker unit dot matrix can be high frequency unit array and low frequency cell array at same row, also can be that high frequency unit array and low frequency cell array are in same delegation.As shown in Figure 4; Be exemplified as 8 row, 4 row; The vertical radiation direction and the vertical radiation angle of the time-delay d1 of each unit of every row～d8 control loudspeaker unit dot matrix, the horizontal radiation direction and the horizontal radiation angle of the relative time delay D1 between every row～D4 control loudspeaker dot matrix.
Fig. 5 is system's pie graph of the digital signal processor 1 of variable directional audio amplifier; It comprises that said digital signal processor comprises first gain controller, first parametric equalizer, first delayer, frequency divider, second delayer, second parametric equalizer and second gain controller, and first gain controller is responsible for the Audio Meter of input is regulated; First parametric equalizer is responsible for that input audio signal is carried out frequency response equalization and is handled, and optimizes the frequency response of variable directional audio amplifier, improves tonequality; First delayer is responsible for the input signal of audio amplifier is carried out delay process; Frequency divider is responsible for that the audio signal of input is carried out frequency division and is handled, and simultaneously high-frequency signal is distributed to the output channel 1～N at high frequency unit array place, low frequency signal is distributed to the output channel N+1～2N at low frequency cell array place; Second delayer is responsible for the delay process to output audio signal; Realization is carried out control delay process able to programme respectively to the audio signal of the loudspeaker unit of every row of getting into the high frequency unit array and every row, and the audio signal of the loudspeaker unit of every row of getting into the low frequency cell array and every row is carried out control delay process able to programme respectively; Second parametric equalizer is responsible for output audio signal is carried out the frequency response Audio Processing, improves the frequency response of delayer unit; Second gain controller is responsible for the level adjustment to output audio signal, realizes the sensitivity coupling of each loudspeaker unit.
Fig. 6 is one of loud speaker dot matrix arrangement of variable directional audio amplifier, and unit a is the woofer unit, is responsible for playing the voice signal of low-frequency range, and unit b is a high frequency unit, is responsible for playing the voice signal of high band.Because the volume of high frequency unit is very little, the distance between the unit significantly reduces than the distance between the low frequency cell, and there is not interference in the broadcast of high band sound yet, or interference significantly reduces, and satisfies high-quality public address requirement.This loud speaker dot matrix high frequency unit adopts the 32*4 dot matrix, and low frequency cell adopts the 8*2 dot matrix, can realize the radiation direction control and the angle of radiation control of vertical direction and horizontal direction.
Fig. 7 be the variable directional audio amplifier loud speaker dot matrix arrangement two; This loud speaker dot matrix high frequency unit adopts the 32*1 dot matrix; Low frequency cell adopts the 8*1 dot matrix; Because the quantity of row is 1, can not realize the radiation direction and the angle of radiation control of horizontal direction, only radiation direction control and angle of radiation control to realize vertical direction.
Fig. 8 be the variable directional audio amplifier loud speaker dot matrix arrangement three, this loud speaker dot matrix high frequency unit and low frequency cell all are designed to modularization, the high frequency unit module is the 8*4 dot matrix; The low frequency cell module is the 2*1 dot matrix; Each module is Combination application as required, and in this scheme, the high frequency unit dot matrix is the 16*16 dot matrix; The low frequency cell dot matrix is the 8*4 dot matrix, and the radiation direction control and the angle of radiation control of accurate vertical direction and horizontal direction can be provided.
Fig. 9 is that the arenas of variable directional audio amplifier is used signal, and the variable directional audio amplifier is installed in the side wall of proscenium arch both sides, the vertical installation, and directly towards the auditorium, gallery is two-layer up and down, and the upper strata is the balcony gallery, and lower floor is the stall gallery.Be provided with 6 at gallery and measure microphone, be respectively microphone 1,2,3,4,5,6, be provided with at balcony cantilever platform place and measure microphone 7, be provided with at the top, auditorium and measure microphone 8.
Figure 10 is the radiated sound field of variable directional audio amplifier, and the programming of variable directional audio amplifier is set to 2 radiation lobes, top lobe radiation balcony gallery, bottom lobe radiation stall gallery.The radiation lobe of audio amplifier accurately is radiated gallery, effectively avoids being radiated the top and the balcony cantilever platform of auditorium.The measurement result of Figure 11 radiated sound field also fully reflects this result, and the direct sound wave frequency response of measuring microphone 1,2,3,4,5,6 measurements is basic identical, and the direct sound wave of full frequency band differs less than 6dB; Be full direct sound wave the uniformity 6dB, very desirable, and the measurement result of microphone 7 is visible; Greater than 1000 hertz Mid Frequency and high band, its direct sound wave on average lacks 12dB than the direct sound wave of gallery, and promptly its acoustical power is ten sixths of gallery acoustical power; The measurement result of microphone 8 is visible; Greater than 200 hertz low-frequency range, Mid Frequency and high band, its direct sound wave on average significantly reduces than the direct sound wave of gallery, and high band is about and reduces 18dB; Be that its acoustical power is 1/64th of a gallery acoustical power, all very desirable.Can find out that from the arenas application result directive property control ability of the variable directional audio amplifier of the utility model is very strong, be that common bugle hardly matches.
The above is merely the preferred embodiments of the utility model; The utility model is not limited to above-mentioned execution mode; In implementation process, possibly there is local small structural modification; If spirit and scope that the various changes or the modification of the utility model do not broken away from the utility model, and belong within the claim and equivalent technologies scope of the utility model, then the utility model also is intended to comprise these changes and modification.
Claims (4)
1. variable directional audio amplifier, it comprises:
Be used for the audio signal of input audio amplifier is carried out the digital signal processor of frequency division, gain, equilibrium and delay process;
Be used for the output audio signal of digital signal processor is carried out power amplification, and the power amplifier that drives separate speaker unit;
Be used to play the loudspeaker unit dot matrix of the audio signal after power amplifier is handled;
It is characterized in that; Said digital signal processor, power amplifier and loudspeaker unit dot matrix all contain M*N autonomous channel; Said digital signal processor comprises the audio signal of the loudspeaker unit of the every row that get into the loudspeaker unit dot matrix is carried out control delay process able to programme respectively; And the audio signal of the loudspeaker unit of every row of getting into the loudspeaker unit dot matrix carried out second delayer of control delay process able to programme respectively, wherein M and N are respectively and are not less than 1 natural number.
2. require 1 described variable directional audio amplifier according to claim; It is characterized in that; Said loudspeaker unit dot matrix can be the high frequency unit array; It also can be the low frequency cell array; Can also be the high frequency unit array mixes dot matrix with the low frequency cell array is formed, and said second delayer carries out control delay process able to programme respectively to the audio signal of the loudspeaker unit of every row of getting into the high frequency unit array and every row, and the audio signal of the loudspeaker unit of every row of getting into the low frequency cell array and every row is carried out control delay process able to programme respectively.
3. require 2 described variable directional audio amplifiers according to claim, it is characterized in that, said loudspeaker unit dot matrix can be high frequency unit array and low frequency cell array at same row, also can be that high frequency unit array and low frequency cell array are in same delegation.
4. according to claim 2 or 3 described variable directional audio amplifiers, it is characterized in that said digital signal processor comprises:
Be responsible for first gain controller to the Audio Meter adjusting of input;
Be responsible for the audio signal of input is carried out first parametric equalizer that frequency response equalization is handled;
Be responsible for the audio signal of input is carried out first delayer of delay process;
Be responsible for that the audio signal of input is carried out frequency division and handle, simultaneously high-frequency signal is distributed to the output channel 1～N at high frequency unit array place, low frequency signal is distributed to the frequency divider of the output channel N+1～2N at low frequency cell array place;
Be responsible for the audio signal on each output channel is carried out delay process second delayer of the programming Control of the high frequency unit array of realization loud speaker point array element and the radiation direction of low frequency cell array and angle of radiation;
Be responsible for the audio signal on each output channel is carried out second parametric equalizer that frequency response equalization is handled;
Be responsible for second gain controller to Audio Meter adjusting on each output channel.
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| CN201120162446U CN202143200U (en) | 2011-05-20 | 2011-05-20 | Variable directive sound box |
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| CN201120162446U CN202143200U (en) | 2011-05-20 | 2011-05-20 | Variable directive sound box |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102984622A (en) * | 2012-11-21 | 2013-03-20 | 山东共达电声股份有限公司 | Micro loudspeaker array system with directivity sound field |
| CN106416293A (en) * | 2014-06-03 | 2017-02-15 | 杜比实验室特许公司 | Audio speakers having upward firing drivers for reflected sound rendering |
| CN106859943A (en) * | 2017-01-20 | 2017-06-20 | 广州市隆山骏河健康科技有限公司 | Based on the passive type micromotion control method that source of sound drives |
| CN107113492A (en) * | 2014-10-10 | 2017-08-29 | Gde工程有限公司 | The method and apparatus that customized sound distribution is provided |
| CN108476359A (en) * | 2015-12-15 | 2018-08-31 | Pss比利时股份有限公司 | Loudspeaker assembly and correlation technique |
| CN109040908A (en) * | 2018-09-04 | 2018-12-18 | 音王电声股份有限公司 | A kind of ring screen loudspeaker array and its control method with directive property |
| CN116614744A (en) * | 2023-07-21 | 2023-08-18 | 广东保伦电子股份有限公司 | Sound system with dot line array combination |
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2011
- 2011-05-20 CN CN201120162446U patent/CN202143200U/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102984622A (en) * | 2012-11-21 | 2013-03-20 | 山东共达电声股份有限公司 | Micro loudspeaker array system with directivity sound field |
| CN106416293A (en) * | 2014-06-03 | 2017-02-15 | 杜比实验室特许公司 | Audio speakers having upward firing drivers for reflected sound rendering |
| US11064308B2 (en) | 2014-06-03 | 2021-07-13 | Dolby Laboratories Licensing Corporation | Audio speakers having upward firing drivers for reflected sound rendering |
| CN107113492A (en) * | 2014-10-10 | 2017-08-29 | Gde工程有限公司 | The method and apparatus that customized sound distribution is provided |
| CN107113492B (en) * | 2014-10-10 | 2020-11-24 | Gde工程有限公司 | Method and apparatus for providing customized sound distribution |
| CN108476359A (en) * | 2015-12-15 | 2018-08-31 | Pss比利时股份有限公司 | Loudspeaker assembly and correlation technique |
| CN108476359B (en) * | 2015-12-15 | 2022-02-15 | Pss比利时股份有限公司 | Loudspeaker assembly and related method |
| CN106859943A (en) * | 2017-01-20 | 2017-06-20 | 广州市隆山骏河健康科技有限公司 | Based on the passive type micromotion control method that source of sound drives |
| CN109040908A (en) * | 2018-09-04 | 2018-12-18 | 音王电声股份有限公司 | A kind of ring screen loudspeaker array and its control method with directive property |
| WO2020047931A1 (en) * | 2018-09-04 | 2020-03-12 | 音王电声股份有限公司 | Directional screen-surrounding speaker array and control method thereof |
| CN116614744A (en) * | 2023-07-21 | 2023-08-18 | 广东保伦电子股份有限公司 | Sound system with dot line array combination |
| CN116614744B (en) * | 2023-07-21 | 2023-11-17 | 广东保伦电子股份有限公司 | Sound system with dot line array combination |
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Owner name: GUANGZHOU LEAFUN CULTURE SCIENCE + TECHNOLOGY CO., Free format text: FORMER OWNER: GUANGDONG LIHUA ACOUSTO-OPTIC TECHNOLOGY CO., LTD. Effective date: 20120427 |
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Effective date of registration: 20120427 Address after: 885 A410 room, Shenzhou Road, Science Town, Guangzhou hi tech Industrial Development Zone, Guangdong 510663, China Patentee after: Guangzhou Leafun Culture Technology Co., Ltd. Address before: 510663, science and Technology Development Zone, Guangdong, Guangzhou science Avenue 191, A1 sixth, 603 units Patentee before: Guangzhou Lihua Culture Science and Technology Co. Ltd. |
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