CN110191392A - A kind of virtual reality public address implementation method - Google Patents
A kind of virtual reality public address implementation method Download PDFInfo
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- CN110191392A CN110191392A CN201910377453.9A CN201910377453A CN110191392A CN 110191392 A CN110191392 A CN 110191392A CN 201910377453 A CN201910377453 A CN 201910377453A CN 110191392 A CN110191392 A CN 110191392A
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000005259 measurement Methods 0.000 claims abstract description 13
- 238000012545 processing Methods 0.000 claims description 22
- 238000013459 approach Methods 0.000 claims description 19
- 230000006698 induction Effects 0.000 claims description 16
- 230000009467 reduction Effects 0.000 claims description 5
- 230000008447 perception Effects 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000012360 testing method Methods 0.000 abstract description 3
- 230000002787 reinforcement Effects 0.000 description 12
- 230000008901 benefit Effects 0.000 description 6
- 230000001934 delay Effects 0.000 description 5
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- 210000003323 beak Anatomy 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
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- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005236 sound signal Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000031016 anaphase Effects 0.000 description 1
- 230000003542 behavioural effect Effects 0.000 description 1
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Classifications
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- 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
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
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- 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
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
- H04R1/403—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers loud-speakers
Abstract
The invention discloses a kind of virtual reality public address implementation methods, comprising: carries out basic measurement to the space that needs are implemented, and establishes threedimensional model according to metrical information；The placement position of surrounding boundary speaker is determined in the threedimensional model；The placement position of speaker at the top of being determined in the threedimensional model；The placement position of bottom speaker in being determined in the threedimensional model；Acoustic parameter and output are adjusted to the speaker for determining position；The present invention solves the problems, such as that the acoustic image orientation of audience's perception and practical sound source are inconsistent for application scenarios such as meeting, teaching, stage performances, realizes that the audience of different location perceives sound from practical sound source, and volume is close；The acoustic image orientation that audience perceives when sound source position variation changes therewith；And this system can be used for playing back and real-time scene, and without complicated post-production, application method is simple；With very strong portability, in varying environment test corresponding with occasion progress and debugging.
Description
Technical field
The present invention relates to technical field of voice control more particularly to a kind of virtual reality public address implementation methods.
Background technique
Existing sound reinforcement system generally comprises microphone (also known as microphone), sound signal processing apparatus, power amplifier and raises
Sound device.Microphone picks up the sound that sound source (speech, speech, singing, instrument playing etc.) issues, and sound signal processing apparatus is to it
It amplifies, handle (balanced, frequency dividing, pressure limit etc.), power amplification is then carried out by power amplifier, finally by loudspeaker
It plays.Loudspeaker is usually placed in rostrum (stage, dais) two sides or top, has sufficiently large sound to make rear auditoria also
It arbitrarily downgrades, may also need to arrange benefit sound loudspeaker at rear.In order to enable auditoria sound field is more evenly, also sampling disperses cloth sometimes
Loudspeaker is distributed across day above auditoria and taken by the mode set.
" hall, stadiums sound reinforcement system design specification " (GB/T 28049-2011) provides that the acoustics of sound reinforcement system is special
Property index includes maximum sound pressure level, transmission frequency characteristic, sound transmission gain, steady sound field unevenness, language transmission index, system
OA overall noise level, OA overall noise level, early anaphase acoustic energy ratio.These objective indicators have critically important work to the performance for guaranteeing sound reinforcement system
With.On this basis, people also require subjective hearing effect, such as hearing viewing community, it is desirable to audience's perceived sounds be from
What sound source position issued, but do not required in GB/T28049-2011.
All there is the sound that audience perceives in the technology that existing sound reinforcement system uses and sound source (makes a speech, speech, sings, is happy
Device performance etc.) the inconsistent problem in orientation, it is mainly manifested in:
1. the acoustic image orientation of pair static sound source, audience's perception of different location is different；
2. pair moving acoustic sources, the acoustic image unchanged direction of audience's perception.
The sound reinforcement system that loudspeaker arrangement is taken in auditoria day can allow everyone audience to perceive sound when in use
From nearest loudspeaker, the sound that the people of different zones hears is from above-head, and sound source can not be accurately positioned
Orientation.
Sound reinforcement system by loudspeaker arrangement in rostrum (stage, dais) two sides, audience perceive sound and come from front,
But the audio direction that the audience of same row perceives is different.Intermediate audience perceives sound in the middle part of stage, and the left side is listened
For crowd due to closer with a distance from left-hand loudspeaker, perception sound comes the stage left side, and the audience on similar the right perceives sound
On the right of from stage.This kind of sound reinforcement system is to make rear auditoria also to have sufficiently large sound pressure level, arranges benefit sound at rear sometimes
The signal of loudspeaker, these loudspeakers of feeding has suitable time-delay, so that heel row audience can perceive sound in the past
Fang Lai, rather than come from benefit sound loudspeaker.But still there are audio direction difference this problem that same row audience perceives.
By sound reinforcement system of the loudspeaker arrangement above rostrum (stage, dais), audience is perceived on before sound comes from
Side, especially front-seat audience's perceived sounds come from the crown.To this sound reinforcement system, although some also below main loudspeaker plus is drawn
Acoustic image loudspeaker, although this method, which can make forward portion region audience perceive sound, is not from the crown, the area having
Domain audience feels that acoustic image is unstable instead, therefore not can solve the acoustic image orientation of audience's perception and practical sound source is inconsistent asks
Topic.
Summary of the invention
The present invention provides a kind of virtual reality public address implementation methods, for applied fields such as meeting, teaching, stage performances
Scape solves the problems, such as that the acoustic image orientation of audience's perception and practical sound source are inconsistent, realizes that the audience of different location perceives sound
Sound comes from practical sound source, and volume is close；The acoustic image orientation that audience perceives when sound source position variation changes therewith；And
And this system can be used for playing back and real-time scene, without complicated post-production, application method is simple；With very strong portable
Property, in varying environment test corresponding with occasion progress and debugging.
In order to solve the above-mentioned technical problem, the embodiment of the invention provides a kind of virtual reality public address implementation methods, comprising:
Basic measurement is carried out to the space that needs are implemented, and threedimensional model is established according to metrical information；
The placement position of surrounding boundary speaker is determined in the threedimensional model；
The placement position of speaker at the top of being determined in the threedimensional model；
The placement position of bottom speaker in being determined in the threedimensional model；
Acoustic parameter and output are adjusted to the speaker for determining position.
Preferably, the described pair of space for needing to implement carries out basic measurement, and establishes three-dimensional according to metrical information
Model, comprising:
It determines space boundary, measures bulk；
It determines sound source and audience region, measures each sound source and the position coordinates of audience；
After determining that effective coverage, the effective coverage expand outwardly 0.8 meter for the polygon comprising institute's sound source, audience
Range, if effective coverage and the contact of space boundary line, contact portion is using space boundary line as effective coverage boundary；
Three-dimensional modeling is carried out to space according to metrical information, the model includes space multistory shape, sound source and audience position
It sets and effective coverage.
Preferably, the placement position that surrounding boundary speaker is determined in the threedimensional model, comprising:
Determine boundary speaker height h；
Measurement determine on rear side of each audience within the scope of 180 ° on one or more space boundaries face at h height with the audience away from
From shortest point, and its distance is recorded, obtains closest approach, be labeled on model；
The closest approach for merging each boundary face obtains the placement position point of speaker；
Boundary face speaker direction is parallel to the horizontal plane, and vertical with the boundary face speaker line, is directed toward effective coverage and makees
For the placing direction of speaker.
Preferably, in the determining boundary speaker height h: when there is bench, h=bench face height+0.7m；
When no bench need to stand, h=1.7m.
Preferably, the closest approach for merging each boundary face, obtains the placement position point of speaker, comprising:
In boundary face at h height, diameter, as round edge, is done with the smallest closest approach of a certain lateral extent of boundary face as d meters
Circle, the closest approach for including in circle is merged into the point on the center of circle, if the location point as the boundary face speaker；
If point distance in adjacent position is greater than d meters, point increases location point therebetween；
If be greater than d meters apart from side by proximal edges speaker, it can uniformly increase location point between the speaker and side.
Preferably, it is described in the threedimensional model determine at the top of speaker placement position, comprising:
Determine that effective coverage in the view field of top of space, is evenly arranged multiple rows of or single multiple speakers；
Speaker is evenly arranged except view field, interval is the same；
Speaker is set towards underface.
Preferably, 1.2-1.5 meters are divided between the speaker for being evenly arranged multiple rows of or single multiple speakers.
Preferably, it is described in the threedimensional model determine in bottom speaker placement position, comprising:
By sound source towards being set to main sound box point at the 50cm of effective coverage center, and main sound box point of the distance lower than 60cm is closed
And to intermediate point；
It is merged by merging proximity pair main sound box point, merges radius of circle at this time and be not greater than 30cm；
For the tables of sleeve configuration, single point can be used, main sound box point is evenly distributed on table according to sound source position at this time
Platform central axes or near；
Treated, and main sound box point is speaker placed point.
Preferably, acoustic parameter and output is adjusted in the speaker of described pair of determining position, comprising:
Each sound source is calculated at a distance from all speakers；
In simple sund source, source sound is by microphone, and into audio processing equipment, acoustical signal is by noise reduction and automatically
After gain control processing, the identical signal in the road N is copied as, wherein N is speaker sum, and different delay and increasing are carried out to every road signal
Benefit reason, the road N signal are exported to N number of speaker；
When more people talk simultaneously, the rapid processing of first two steps first is carried out to the acoustical signal of different sound sources, obtains Q × N
The processed signal in road, wherein Q is while the number of speech, N are speaker sum；Again by the road the Q signal of the same speaker of correspondence
It is input to audio processing equipment, the road Q signal be added and dynamic range control is handled, is exported after processing to the former road Q signal
Corresponding speaker.
Preferably, described in simple sund source, away from nearest middle bottom speaker to induction signal the delay
For n ms, gain is t dB；
Bottom speaker is to the delay of induction signal in otherGain is (- 20log
(sa)-t1)dB；
Boundary face speaker is to the delay of induction signalGain is (- 20log
(sa)-t2)dB；
Top speaker is to the delay of induction signalGain is (- 20log (Sa)-
t3)dB；
Wherein, saIt is the speaker at a distance from sound source (m), v0For the velocity of sound (generally taking 340m/s) under the environment temperature, nx
(x ∈ { 1,2,3 }) is delays time to control amount, generally takes [3,10], tx(x ∈ { 1,2,3 }) is gain control amount, generally takes [2,6].
Compared with the prior art, the embodiment of the present invention has the following beneficial effects:
The present invention solve under the scenes such as meeting, teaching, stage, auditor apart from sounder farther out when, hear that sound is small
Or it is unintelligible, the problem of sounder orientation can not be accurately positioned, will not generate sound field confusion, sound situation not of uniform size；And
And this method can be used for playing back and real-time scene, without complicated post-production, application method is simple；With very strong portable
Property, in varying environment test corresponding with occasion progress and debugging.
For the present invention during expanding talker's sound, sound field is uniform, and audience can distinguish the specific orientation of sound source, from
And be perfectly combined together speech content with sound source, enhance the sense of participation of audience, creates good say and listen atmosphere.
Detailed description of the invention
Fig. 1: for the step flow diagram in embodiment of the present invention method.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Fig. 1 is please referred to, the preferred embodiment of the present invention provides a kind of virtual reality public address implementation method, comprising:
S1 carries out basic measurement to the space that needs are implemented, and establishes threedimensional model according to metrical information；
S2 determines the placement position of surrounding boundary speaker in the threedimensional model；
S3, in the threedimensional model determine at the top of speaker placement position；
S4, in the threedimensional model determine in bottom speaker placement position；
Acoustic parameter and output is adjusted to the speaker for determining position in S5.
In the present embodiment, the described pair of space for needing to implement carries out basic measurement, and establishes three-dimensional according to metrical information
Model, comprising:
S11 determines space boundary, measures bulk；
S12 determines sound source and audience region, measures each sound source and the position coordinates of audience；
S13 determines that effective coverage, the effective coverage expand outwardly 0.8 meter for the polygon comprising institute's sound source, audience
Range afterwards, if effective coverage and the contact of space boundary line, contact portion is using space boundary line as effective coverage boundary；
S14, according to metrical information to space carry out three-dimensional modeling, the model include space multistory shape, sound source with listen
Many positions and effective coverage.
In the present embodiment, the placement position that surrounding boundary speaker is determined in the threedimensional model, comprising:
S21 determines boundary speaker height h；
S22, measurement determines to be listened at h height with this on one or more space boundaries face within the scope of 180 ° on rear side of each audience
Crowd records its distance apart from shortest point, obtains closest approach, is labeled on model；
S23 merges the closest approach of each boundary face, obtains the placement position point of speaker；
Boundary face speaker direction is parallel to the horizontal plane S24, and vertical with the boundary face speaker line, is directed toward effective district
Placing direction of the domain as speaker.
In the present embodiment, in the determining boundary speaker height h: when there is bench, h=bench face height+0.7m；
When no bench need to stand, h=1.7m.
In the present embodiment, the closest approach for merging each boundary face, obtains the placement position point of speaker, comprising:
S231, in boundary face at h height, as round edge, to do diameter with the smallest closest approach of a certain lateral extent of boundary face
For d meters of circle, the closest approach for including in circle is merged into the point on the center of circle, if the location point as the boundary face speaker；
S232, if point distance in adjacent position is greater than d meters, point increases location point therebetween；
If S233 can uniformly increase position between the speaker and side be greater than d meters apart from side by proximal edges speaker
Point.
In the present embodiment, it is described in the threedimensional model determine at the top of speaker placement position, comprising:
S31 determines that effective coverage in the view field of top of space, is evenly arranged multiple rows of or single multiple speakers；
S32, is evenly arranged speaker except view field, and interval is the same；
Speaker is arranged towards underface in S33.
In the present embodiment, 1.2-1.5 meters are divided between the speaker for being evenly arranged multiple rows of or single multiple speakers.
In the present embodiment, it is described in the threedimensional model determine in bottom speaker placement position, comprising:
Distance by sound source towards being set to main sound box point at the 50cm of effective coverage center, and is lower than the main sound box of 60cm by S41
Point is incorporated into intermediate point；
S42, is merged by merging proximity pair main sound box point, is merged radius of circle at this time and is not greater than 30cm；
S43 can use single point, main sound box point is uniformly distributed according to sound source position at this time for the tables of sleeve configuration
Tables central axes or near；
S44, treated, and main sound box point is speaker placed point.
In the present embodiment, acoustic parameter and output is adjusted in the speaker of described pair of determining position, comprising:
S51 calculates each sound source at a distance from all speakers；
S52, in simple sund source, source sound is by microphone, into audio processing equipment, acoustical signal by noise reduction and
After automatic growth control processing, the identical signal in the road N is copied as, wherein N is speaker sum, carries out different delays to every road signal
With gain process, the road N signal is exported to N number of speaker；
S53 first carries out the rapid processing of first two steps to the acoustical signal of different sound sources, obtains Q when more people talk simultaneously
The processed signal in the road × N, wherein Q is while the number of speech, N are speaker sum；The road Q of the same speaker of correspondence is believed again
Number it is input to audio processing equipment, the road Q signal be added is handled with dynamic range control, output to the former road Q is believed after processing
Number corresponding speaker.
In the present embodiment, described in simple sund source, away from nearest middle bottom speaker to induction signal the delay
For n ms, gain is t dB；
Bottom speaker is to the delay of induction signal in otherGain is (- 20log
(sa)-t1)dB；
Boundary face speaker is to the delay of induction signalGain is (- 20log
(sa)-t2)dB；
Top speaker is to the delay of induction signalGain is (- 20log (sa)-
t3)dB；
Wherein, saIt is the speaker at a distance from sound source (m), v0For the velocity of sound (generally taking 340m/s) under the environment temperature, nx
(x ∈ { 1,2,3 }) is delays time to control amount, generally takes [3,10], tx(x ∈ { 1,2,3 }) is gain control amount, generally takes [2,6].
Combined with specific embodiments below, the present invention is described in detail.
Basic measurement:
1. determining space boundary, bulk is measured；
2. determining sound source position and audience region, the position coordinates of each possible sound source position and audience are measured；
3. determining effective coverage.Effective coverage expand outwardly 0.8 meter for the polygon comprising institute's sound source, audience after model
It encloses, if effective coverage and the contact of space boundary line, contact portion is using space boundary line as effective coverage boundary；
4. carrying out three-dimensional modeling to space according to metrical information, model includes space multistory shape, sound source and listener position,
Effective coverage, measurement later carry out on model with calculating；
Surrounding boundary face speaker is put:
5. determine boundary speaker height h, in general, when having bench, h=bench face height+0.7m；No bench needs to stand
When, h=1.7m；H a small range can be changed as the case may be；
It is listened at h height with this on (one or more) space boundary face within the scope of 180 ° on rear side of each audience 6. measurement determines
Crowd referred to as " closest approach " is labeled on model apart from shortest point (and recording its distance)；
7. merging the closest approach of each boundary face, method are as follows: in boundary face at h height, with boundary face side away from
It is round edge from the smallest closest approach, does the circle that diameter is d meters (d is changeable, and diameter is smaller, and speaker sum is more, and effect is better),
The closest approach for including in circle is merged into the point on the center of circle, if the location point as the boundary face speaker；If adjacent position point away from
From being greater than d meters, increase location point can be put therebetween；If be greater than d meter apart from side by proximal edges speaker, can in the speaker and
Uniformly increase location point between side；
8. boundary face speaker direction is parallel to the horizontal plane, vertical with the boundary face speaker line, it is directed toward effective coverage；
Top speaker is put:
9. determining that effective coverage in the view field of top of space, is evenly arranged multiple rows of (or single) multiple speakers, speaker
Interval is advisable with 1.2-1.5 meters；To enhance public address effect, speaker can be evenly arranged except view field, interval is the same；Speaker
Towards underface.
Middle bottom speaker is put
10. by sound source towards being set to main sound box point at the 50cm of effective coverage center, and distance is lower than the main sound box of 60cm
Point is incorporated into intermediate point；Or main sound box point is merged by the way of merging closest approach in the 7th step, merge at this time
Radius of circle is not greater than 30cm；For the tables of sleeve configuration, single point can be used, main sound box point is equal according to sound source position at this time
It is even to be distributed in tables central axes (near or)；Treated, and main sound box point is speaker placed point.
Parameter regulation and output
11. calculating each sound source at a distance from all speakers；
12. in simple sund source, source sound is by microphone, into audio processing equipment 1, acoustical signal by noise reduction and
After automatic growth control processing, copy as the identical signal in the road N (N be speaker sum), to every road signal carry out different delay with
Gain process, the road N signal are exported to N number of speaker；Wherein noise reduction and automatic growth control are existing algorithm, are carried out to the road N signal
Delay and gain process follow the rule that obtains in an experiment of the present invention；
13. in simple sund source:
It is n ms to the delay of induction signal away from nearest middle bottom speaker, gain is t dB；
Bottom speaker is to the delay of induction signal in otherGain is (- 20log
(sa)-t1)dB；
Boundary face speaker is to the delay of induction signalGain is (- 20log
(sa)-t2)dB；
Top speaker is to the delay of induction signalGain is (- 20log (sa)-
t3)dB；
Wherein, saIt is the speaker at a distance from sound source (m), v0For the velocity of sound (generally taking 340m/s) under the environment temperature, nx
(x ∈ { 1,2,3 }) is delays time to control amount, generally takes [3,10], tx(x ∈ { 1,2,3 }) is gain control amount, generally takes [2,6]；
When more people talk simultaneously, the rapid processing of first two steps first is carried out to the acoustical signal of different sound sources, obtains Q × N
Road (Q is while the number of speech, N are speaker sum) processed signal, then the road the Q signal of the same speaker of correspondence is inputted
To audio processing equipment 2, row addition is input into the road Q signal and is handled with dynamic range control, is 1 road signal after processing, output is extremely
The corresponding speaker of the former road Q signal, method is handled other road signals according to this.
The advantages of present invention incorporates the multiple technologies of different field, has the advantages that
1, during expanding source sound, sound field is uniform, and audience can distinguish the specific orientation of sound source,
To which the sound of audience's perception be integrated with sound source, enhances natural sense, the cordial feeling, sense of participation of audience, create
Make good sound field atmosphere；
2, because applying different delays in Underwater Acoustic channels, loudspeaker can be greatly reduced to microphone
Feedback quantity reduces sound reinforcement system and utters long and high-pitched sounds probability, so that sound reinforcement system is more stable；
3, the program is not required to complicated post-production, can use always after pre-adjusted, and setting is simple easy to use；Phase
Pass field technical staff can be used by specification fast construction system, and in combination with concrete condition to scheme be finely adjusted with
Scene needed for being suitble to；
4, the program can be used in combination with the schemes such as recognition of face (register, behavioural analysis etc.), with no paper, make one jointly
It is a it is intelligent, convenient, human nature say-listen system.
Particular embodiments described above has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that the above is only a specific embodiment of the present invention, the protection being not intended to limit the present invention
Range.It particularly points out, to those skilled in the art, all within the spirits and principles of the present invention, that is done any repairs
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of virtual reality public address implementation method characterized by comprising
Basic measurement is carried out to the space that needs are implemented, and threedimensional model is established according to metrical information；
The placement position of surrounding boundary speaker is determined in the threedimensional model；
The placement position of speaker at the top of being determined in the threedimensional model；
The placement position of bottom speaker in being determined in the threedimensional model；
Parameter and output are adjusted to the speaker for determining position.
2. virtual reality public address implementation method as described in claim 1, which is characterized in that described pair need the space implemented into
Row basic measurement, and threedimensional model is established according to metrical information, comprising:
It determines space boundary, measures bulk；
It determines sound source and audience region, measures each sound source and the position coordinates of audience；
Determine the model after effective coverage, the effective coverage expand outwardly 0.8 meter for the polygon comprising institute's sound source, audience
It encloses, if effective coverage and the contact of space boundary line, contact portion is using space boundary line as effective coverage boundary；
Three-dimensional modeling is carried out to space according to metrical information, the model includes space multistory shape, sound source and listener position, with
And effective coverage.
3. virtual reality public address implementation method as claimed in claim 2, which is characterized in that described true in the threedimensional model
Determine the placement position of surrounding boundary speaker, comprising:
Determine boundary speaker height h；
Measurement determines on rear side of each audience within the scope of 180 ° on one or more space boundaries face at h height with audience distance most
Short point, and its distance is recorded, closest approach is obtained, is labeled on model；
The closest approach for merging each boundary face obtains the placement position point of speaker；
Boundary face speaker direction is parallel to the horizontal plane, and vertical with the boundary face speaker line, is directed toward effective coverage as sound
The placing direction of case.
4. virtual reality public address implementation method as claimed in claim 3, which is characterized in that in the determining boundary speaker height
When h: when there is bench, h=bench face height+0.7m；When no bench need to stand, h=1.7m.
5. virtual reality public address implementation method as claimed in claim 4, which is characterized in that described to merge each boundary face most
Near point obtains the placement position point of speaker, comprising:
In boundary face at h height, the circle for being d meters, as round edge, to do diameter with the smallest closest approach of a certain lateral extent of boundary face,
The closest approach for including in circle is merged into the point on the center of circle, if the location point as the boundary face speaker；
If point distance in adjacent position is greater than d meters, point increases location point therebetween；
If be greater than d meters apart from side by proximal edges speaker, it can uniformly increase location point between the speaker and side.
6. virtual reality public address implementation method as claimed in claim 5, which is characterized in that described true in the threedimensional model
The placement position of fixed top speaker, comprising:
Determine that effective coverage in the view field of top of space, is evenly arranged multiple rows of or single multiple speakers；
Speaker is evenly arranged except view field, interval is the same；
Speaker is set towards underface.
7. virtual reality public address implementation method as claimed in claim 6, which is characterized in that it is described be evenly arranged it is multiple rows of or single
Multiple speakers speaker between be divided into 1.2-1.5 meters.
8. virtual reality public address implementation method as claimed in claim 7, which is characterized in that described true in the threedimensional model
The placement position of bottom speaker in fixed, comprising:
By sound source towards being set to main sound box point at the 50cm of effective coverage center, and main sound box point of the distance lower than 60cm will be incorporated into
Intermediate point；
It is merged by merging proximity pair main sound box point, merges radius of circle at this time and be not greater than 30cm；
For the tables of sleeve configuration, single point can be used, main sound box point is evenly distributed in tables according to sound source position at this time
Axis or near；
Treated, and main sound box point is speaker placed point.
9. virtual reality public address implementation method as claimed in claim 8, which is characterized in that the speaker of described pair of determining position into
Row adjusts acoustic parameter and output, comprising:
Each sound source is calculated at a distance from all speakers；
In simple sund source, source sound is by microphone, and into audio processing equipment, acoustical signal passes through noise reduction and automatic gain
After control processing, the identical signal in the road N is copied as, wherein N is speaker sum, is carried out at different delay and gain to every road signal
Reason, the road N signal are exported to N number of speaker；
In more sound sources, the rapid processing of first two steps first is carried out to the acoustical signal of different sound sources, it is processed to obtain the road Q × N
Signal, wherein Q is while the number of speech, N are speaker sum；The road the Q signal of the same speaker of correspondence is input to audio again
Processing equipment be added to the road Q signal and dynamic range control is handled, exports after processing to the corresponding speaker of the former road Q signal.
10. virtual reality public address implementation method as claimed in claim 9, which is characterized in that it is described in simple sund source, away from
Nearest middle bottom speaker is n ms to the delay of induction signal, and gain is t dB；
Bottom speaker is to the delay of induction signal in otherGain is (- 20log (sa)-
t1)dB；
Boundary face speaker is to the delay of induction signalGain is (- 20log (sa)-t2)
dB；
Top speaker is to the delay of induction signalGain is (- 20log (sa)-t3)
dB；
Wherein, saFor the speaker and sound source distance m, v0For the velocity of sound under the environment temperature, nx(x ∈ { 1,2,3 }) are delay control
Amount processed, tx(x ∈ { 1,2,3 }) are gain control amount.
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