CN206948625U - A kind of stereo sound field calibrator (-ter) unit - Google Patents
A kind of stereo sound field calibrator (-ter) unit Download PDFInfo
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- CN206948625U CN206948625U CN201720775073.7U CN201720775073U CN206948625U CN 206948625 U CN206948625 U CN 206948625U CN 201720775073 U CN201720775073 U CN 201720775073U CN 206948625 U CN206948625 U CN 206948625U
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Abstract
A kind of stereo sound field calibrator (-ter) unit includes：L channel radio reception device, it is arranged on the left of mobile phone to be measured；R channel radio reception device, it is arranged on the right side of mobile phone to be measured；Preamplifier, input are connected with L channel radio reception device and R channel radio reception device respectively, export the audio signal of amplification；Audio process, input are connected with preamplifier, are digitized processing to the audio of input and are extracted frequency response curve；Microprocessor, input are connected with audio process, are analyzed the frequency response curve and are calculated calibration curve；The L channel radio reception device and R channel radio reception device are set along mobile phone cross central line, and symmetrical on mobile phone.The utility model is used in stereo project, and technical bottleneck is low, does not have particular/special requirement to device and structure design, can compatible original design.And test value is accurate, playback is good, and sound field is accurate.
Description
Technical field
It the utility model is related to the stereo design field of mobile phone, and in particular to a kind of stereo sound field calibrator (-ter) unit.
Background technology
It is stereo, just refer to that there is relief sound.It is a geometrical concept, refers to occupy position in three dimensions
The things put.Because sound source has the locus of determination, sound has the direction source of determination, and the sense of hearing of people, which has, distinguishes sound source side
The ability of position.When especially having multi-acoustical while sounding, people can be with each sound source of Auditory Perception in the position in space point
Cloth situation.In this sense, all sound that nature is sent all are stereo, such as thunder, train sound, the report of a gun
Deng.When we directly hear the sound in these solid spaces, in addition to intensity, tone and the tone color that can experience sound,
Their orientation and level can also be experienced.The sound with spatial characteristics such as orientation levels that this people directly hear
It is stereo in sound, referred to as nature.
The sound that nature is sent is stereo, if but we these it is stereo it is recorded, amplification etc. processing after
And playback time, all sound are all released from a loudspeaker, this acoustical reproduction（Compared with acoustic source）It is not just three-dimensional
.At this moment because various sound are all sent from same loudspeaker, spatial impression originally（The particularly spatial distribution sense of sound group）
Also disappear.This acoustical reproduction is referred to as monophone.If it can recover primary to a certain extent from recorded playback whole system
Raw spatial impression（It can not possibly recover completely）, then, this weight with spatial characteristics such as a certain degree of orientation levels
Sound reproduction, it is referred to as stereo in sound technique.
Compared with monophonic technology, there is sterophonic technique the direction feeling of each sound source and distribution to feel；Improve the clear of information
Clear degree and intelligibility；For video display application, telepresenc, stereovision and the transparency of program can be improved.We are listening MP3
When, a pair of earphones can be typically used, most important reason is exactly to produce stereosonic effect, allows sound to show left and right space
Feel.Therefore in voice signal, we can transmit stereophonic signal with two sound channels：One is responsible for L channel, another
It is individual, it is responsible for R channel.
When sound wave is propagated indoors, to be reflected by barriers such as wall, ceiling, floors, often reflect and will once be hindered
Thing is hindered to absorb.So, after sound source stops sounding, sound wave will pass through multiple reflections and absorption indoors, finally just disappear,
Sound also continues to a period of time after we just feel sound source stopping sounding.This phenomenon is called reverberation.Reverberation phenomenon is in reality
It can not be avoided in life, left and right acoustic channels play to that can simulate actual reverberation effect respectively.
During people's listening, sound can be told and transmitted by which direction, so as to substantially determine the position of sound source.
We are due to that we have the reason of two ears so the direction of sound can be differentiated.For example, there is one in our right front
Sound source, then, because auris dextra is nearer from sound source, sound just passes to auris dextra first, then just pass to left ear, and auris dextra is heard
Sound is more slightly more strong than the sound that left ear is heard.If the sound frequency that sound source is sent is very high, be transmitted to left ear sound some
It can be reflected back by the number of people, thus left ear is just not easily heard this sound.Two ears are this small to the sensation of sound
Difference, pass in cerebral nerve, just enable us to judge that sound is to come from right front.Here it is usually said, " ears are imitated
Should ".
In general recording is monophonic.Such as the recording of a concert, the difference transmitted simultaneously from stage each side
Musical instrument sound, received by a microphone（Or received and then mixed by several microphones）, it is comprehensive into a kind of audio-frequency electric
Flow and record.It is also that sound is sent by a loudspeaker during playback.We can only hear the comprehensive of all directions difference musical instrument
Chorus, and can not differentiate which musical instrument sound be from which direction come, it is imperceptible as listening music inside music hall when
That third dimension（Spatial impression）.It is three-dimensional because the factors such as the power of loudspeaker, position influence in the equipment such as mobile phone during playback
Sense is more difficult to embody.If some preset reverberation effects in audio playing device, the sound generation for enrolling monophonic is stereo
Effect, it will substantially improve cellphone subscriber listens to impression.
At present, it is following two to realize that stereosonic mode mainly has on mobile phone：
1. left and right acoustic channels are kept completely separate, so very high to the coherence request of two sound channels, for cavity design and device
The selection of part is made that very big limitation, will be unable to produce normal sound field using the design method of loudspeaker plus receiver；
2. using the mode of such as DIRAC audios, diversified device and structure design are matched by algorithm process.This
Kind project plan comparison is ripe, strong applicability, but debugging cycle is longer, compares labor intensive.
Effect and sound field positioning of the above two for double horn is required for solving by passively debugging, so for not
The double horn sound field matching of same type and different product demands are required for individually being adjusted, and are achieved in that time-consuming take
Power, can continuity it is also poor.
Utility model content
The purpose of this utility model is to provide a kind of stereo sound field calibrator (-ter) unit and calibration method, applied to mobile phone,
In the mobile terminals and audio/video player such as IPAD, preferable auditory perception is brought for user.The utility model is to stereo
Sound field is calibrated, it is necessary to carry out acoustical signal collection using two microphones set along mobile phone transverse axis.In debugging, on mobile phone
Two loudspeaker play frequency sweep source of sound successively, gather acoustical signal and the signal by receiving is the same as defeated simultaneously by two microphones
Enter the difference in signal frequency, amplitude and phase, two loudspeaker of analysis change in the sound field of axis direction.Allow two loudspeaker same again
When play frequency sweep source of sound, collect two microphones gather simultaneously and the same frequency input signal of the signal by receiving, amplitude and
Difference in phase, two loudspeaker of analysis change in the sound field of axis direction, and finally com-parison and analysis list loudspeaker play and double loudspeakers again
Two loudspeaker are done the debugging of different playbacks by the similarities and differences that play respectively, and it is more accurate to reach a sound field, main
See sense of hearing and lift obvious effect.
A kind of stereo sound field calibrator (-ter) unit, comprising：
L channel radio reception device, it is arranged on the left of mobile phone to be measured；
R channel radio reception device, it is arranged on the right side of mobile phone to be measured；
Preamplifier, it is connected respectively with L channel radio reception device and R channel radio reception device, exports the audio signal of amplification；
Audio process, it is connected with preamplifier, processing is digitized to the audio of input and extracts frequency response
Curve；
Microprocessor, it is connected with audio process, analyzes the frequency response curve and calculate calibration curve；
The L channel radio reception device and R channel radio reception device are set along mobile phone cross central line to be measured, and on mobile phone to be measured
It is symmetrical.
A kind of above-mentioned stereo sound field calibrator (-ter) unit, wherein, set between the preamplifier and audio process
A wave filter is put, the input of wave filter is connected with the preamplifier, the output end of wave filter and the audio process
Connection.
A kind of above-mentioned stereo sound field calibrator (-ter) unit, wherein, the audio process includes：
AD conversion unit, input are connected with the preamplifier, and the simulated audio signal of input is converted into number
Word audio signal；
Memory cell, input are connected with the AD conversion unit, store digitized audio signal；
Frequency response acquiring unit, input are connected with the memory cell, are obtained according to the voice data wherein stored actual
Frequency response curve.
A kind of above-mentioned stereo sound field calibrator (-ter) unit, wherein, set between the AD conversion unit and memory cell
Put a digital filter, the input of digital filter is connected with the AD conversion unit, the output end of wave filter with it is described
Memory cell connects.
A kind of above-mentioned stereo sound field calibrator (-ter) unit, wherein, the microprocessor includes：
Alignment unit；
Computing unit, input are connected with the frequency response acquiring unit in the alignment unit and the audio process, meter
Calculate calibration curve；
Solidified cell, input are connected with the computing unit, receive the calibration curve, and output end is connected with mobile phone,
Calibration curve is cured in mobile phone.
A kind of above-mentioned stereo sound field calibrator (-ter) unit, wherein, it is bent that ideal frequency response is stored in the alignment unit
Line.
A kind of above-mentioned stereo sound field calibrator (-ter) unit, wherein, the solidified cell is directly connected by OTG lines with mobile phone
Connect.
A kind of above-mentioned stereo sound field calibrator (-ter) unit, wherein, the wave filter is analog filter.
The advantages of the utility model and beneficial effect are：
1. being used in stereo project, technical bottleneck is low.
, can compatible original design 2. pair device and structure design do not have particular/special requirement.
3. test value is accurate, playback is good, and sound field is accurate.
Brief description of the drawings
Fig. 1 is the connection block diagram of the utility model alignment equipment.
Fig. 2 is the functional block diagram of the utility model sound intermediate frequency processor.
Fig. 3 is the functional block diagram of microprocessor in the utility model.
Fig. 4 is the step schematic diagram of the utility model alignment technology.
Embodiment
Below in conjunction with accompanying drawing, by describing one or several preferable specific embodiments in detail, the utility model is done
It is expanded on further.
As shown in figure 1, be connection figure when calibrating sound field, using the mobile phone with twin loudspeaker as object during calibration,
Upper speaker 11 is arranged at mobile phone front upper, and power is smaller, is used when being typically for receiving calls；Lower loudspeaker 12 is arranged at hand
Machine lower backside, and it is sometimes amesiality, power is larger, is typically for putting use outside.
A kind of stereo sound field calibrator (-ter) unit, comprising：
L channel radio reception device 21, it is arranged on the left of mobile phone to be measured；
R channel radio reception device 22, it is arranged on the right side of mobile phone to be measured；
Preamplifier 3, it is connected respectively with L channel radio reception device 21 and R channel radio reception device 22, exports the audio letter of amplification
Number；
Audio process 4, it is connected with preamplifier 3, processing is digitized to the audio of input and extracts frequency and is rung
Answer curve；
Microprocessor 5, it is connected with audio process 4, analyzes the frequency response curve and calculate calibration curve；
The L channel radio reception device 21 and R channel radio reception device 22 are set along mobile phone cross central line to be measured, and on to be measured
Mobile phone is symmetrical.
Further, a wave filter can be set between the preamplifier 3 and audio process 4, wave filter
Input is connected with the preamplifier 3, and the output end of wave filter is connected with the audio process 4.
Further, the wave filter is analog filter.
As shown in Fig. 2 the audio process 4 specifically includes：
AD conversion unit 41, input are connected with the preamplifier 3, the simulated audio signal of input are converted to
Digital audio and video signals；
Memory cell 42, input are connected with the AD conversion unit 41, store digitized audio signal；
Frequency response acquiring unit 43, input are connected with the memory cell 42, are obtained according to the voice data wherein stored
Actual frequency response curve.
Based on digitized consideration, if being not provided with analog filter between preamplifier 3 and audio process 4,
One digital filter, the input of digital filter can also be set between the AD conversion unit 41 and memory cell 42
It is connected with the AD conversion unit 41, the output end of wave filter is connected with the memory cell 42.
As shown in figure 3, the microprocessor 5 specifically includes：
Alignment unit 52；
Computing unit 51, input and the frequency response acquiring unit 43 in the alignment unit 52 and the audio process 4
Connection, calculate calibration curve；
Solidified cell 53, input are connected with the computing unit 51, receive the calibration curve, and output end connects with mobile phone
Connect, calibration curve is cured in mobile phone.
Further, ideal frequency response curve is stored in the alignment unit 52.
Further, the solidified cell 53 is directly connected to by OTG lines with mobile phone.
A kind of stereo sound field calibration method, as shown in figure 4, comprising the following steps：
S1, the putting position for determining L channel radio reception device 21 and R channel radio reception device 22；
S2, mobile phone frequency sweep play full acoustic frequency frequency range sound, and L channel radio reception device 21 and R channel radio reception device 22 receive audio
Information；
S3, the record audio information of audio process 4 simultaneously extract frequency response curve；
S4, microprocessor 5 by step S3 gained frequency response curve compared with ideal frequency response curve and
Calculate, draw calibration curve；
The calibration curve of gained in step S4 is cured in mobile phone by S5, microprocessor 5 by programmable device.
Further, the sound played in step s 2 is pure-tone pulse or single frequency sinusoidal ripple.
Further, the repeated multiple times execution of step S2.
Further, a complete audio-frequency information process that receives specifically includes in the step S2：
S21, the 21 independent radio reception of L channel radio reception device；
S22, the 22 independent radio reception of R channel radio reception device；
The radio reception simultaneously of S23, L channel radio reception device 21 and R channel radio reception device 22.
Further, also included after step S23：
S24, the position for exchanging L channel radio reception device 21 and R channel radio reception device 22, both radio reception simultaneously.
The step S3 is specifically included：
S31, the AD conversion unit 41 are digitized processing to the step S2 audio-frequency informations received；
S32, the memory cell 42 store digitized audio-frequency information；
S33, the frequency response acquiring unit 43 obtain frequency response according to the audio-frequency information stored in the memory cell 42
Curve.
The step S4 is specifically included：
Between signal and input signal that S41, contrast L channel radio reception device 21 receive in frequency, amplitude and phase
Difference, analysis L channel radio reception device 21 change in the sound field of axis direction；
Between signal and input signal that S42, contrast R channel radio reception device 22 receive in frequency, amplitude and phase
Difference, analysis R channel radio reception device 22 change in the sound field of axis direction；
Difference signal and input signal that S43, contrast two-channel receive simultaneously between in frequency, amplitude and phase
Different, analysis L channel radio reception device 21 and R channel radio reception device 22 change in the sound field of axis direction；
S44, according to above-mentioned change, calculate calibration curve.
In this programme design, the selection of MIC positions needs to be placed on side center line both sides, as is illustrated schematically.This mode
Sound field can be more accurately calibrated, because when normal person uses mobile phone, stereosonic sound field wants symmetery during the adept machine in side
Can just have a good performance, MIC innovation formulas to be placed on axis both sides more effective from algorithm.
Another application mode of this programme is, with reference to acousto-optic conversion device and display screen, not visible sound wave to be changed
For visual colored waveform, display provides vision auxiliary reference on a display screen, to commissioning staff, assists calibration.
Acoustoopic rotary converter array, corresponding control module and display are added in a kind of stereo sound field calibrator (-ter) unit
Screen.Acoustoopic rotary converter array echoes setting respectively with L channel radio reception device 21 and R channel radio reception device 22, and is placed on same position
Put, to receive identical information of acoustic wave.Under the control of control module, acoustoopic rotary converter array and L channel radio reception device 21 and
R channel radio reception device 22 is synchronous to receive sound wave, and the spread state of the sound wave is visualized by acoustoopic rotary converter array, and is being shown
Shown in screen.
N number of acoustoopic rotary parallel operation is included in the acoustoopic rotary converter array, wherein, N is natural number.N number of acoustoopic rotary parallel operation with
It is rectangular arrangement and form.Each acoustoopic rotary parallel operation to forming acoustoopic rotary converter array, gating is provided by control module respectively
Signal.Each acoustoopic rotary parallel operation performs following processing respectively：Measured with the rising edge synch of gating signal at its allocation position
The moment acoustic pressure instantaneous value, the light of corresponding with instantaneous value brightness is radiated, untill gating signal rising next time.Separately
Outside, in the present embodiment, carry out the situation of sound pressure measurement etc. with illustrating the rising edge synch with gating signal, also may be used certainly
These processing are synchronously performed with the trailing edge with gating signal, also can be with gating signal rising edge（Or trailing edge）Times in addition
Meaning timing instant synchronously measures acoustic pressure.
Although content of the present utility model is discussed in detail by above preferred embodiment, but it should be appreciated that on
The description stated is not considered as to limitation of the present utility model.After those skilled in the art have read the above, for
A variety of modifications and substitutions of the present utility model all will be apparent.Therefore, the scope of protection of the utility model should be by appended
Claim limit.
Claims (8)
1. a kind of stereo sound field calibrator (-ter) unit, it is characterised in that include：
L channel radio reception device（21）, it is arranged on the left of mobile phone to be measured；
R channel radio reception device（22）, it is arranged on the right side of mobile phone to be measured；
Preamplifier（3）, not with L channel radio reception device（21）With R channel radio reception device（22）Connection, export the audio letter of amplification
Number；
Audio process（4）, with preamplifier（3）Connection, processing is digitized to the audio of input and extracts frequency and is rung
Answer curve；
Microprocessor（5）, with audio process（4）Connection, analyzes the frequency response curve and calculates calibration curve；
The L channel radio reception device（21）With R channel radio reception device（22）Set along mobile phone cross central line to be measured, and on to be measured
Mobile phone is symmetrical.
2. a kind of stereo sound field calibrator (-ter) unit as claimed in claim 1, it is characterised in that in the preamplifier（3）
And audio process（4）Between a wave filter is set, the input of wave filter and the preamplifier（3）Connection, wave filter
Output end and the audio process（4）Connection.
A kind of 3. stereo sound field calibrator (-ter) unit as claimed in claim 1, it is characterised in that the audio process（4）Bag
Contain：
AD conversion unit（41）, input and the preamplifier（3）Connection, the simulated audio signal of input is converted to
Digital audio and video signals；
Memory cell（42）, input and the AD conversion unit（41）Connection, store digitized audio signal；
Frequency response acquiring unit（43）, input and the memory cell（42）Connection, obtained according to the voice data wherein stored
Actual frequency response curve.
4. a kind of stereo sound field calibrator (-ter) unit as claimed in claim 3, it is characterised in that in the AD conversion unit
（41）And memory cell（42）Between a digital filter is set, the input of digital filter and the AD conversion unit
（41）Connection, the output end of wave filter and the memory cell（42）Connection.
A kind of 5. stereo sound field calibrator (-ter) unit as claimed in claim 1, it is characterised in that the microprocessor（5）Comprising：
Alignment unit（52）；
Computing unit（51）, input and the alignment unit（52）With the audio process（4）In frequency response acquiring unit
（43）Connection, calculate calibration curve；
Solidified cell（53）, input and the computing unit（51）Connection, receives the calibration curve, and output end connects with mobile phone
Connect, calibration curve is cured in mobile phone.
6. a kind of stereo sound field calibrator (-ter) unit as claimed in claim 5, it is characterised in that in the alignment unit（52）In
Store ideal frequency response curve.
A kind of 7. stereo sound field calibrator (-ter) unit as claimed in claim 5, it is characterised in that the solidified cell（53）Pass through
OTG lines are directly connected to mobile phone.
8. a kind of stereo sound field calibrator (-ter) unit as claimed in claim 2, it is characterised in that the wave filter is analog filtering
Device.
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| CN201720775073.7U CN206948625U (en) | 2017-06-29 | 2017-06-29 | A kind of stereo sound field calibrator (-ter) unit |
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| CN201720775073.7U CN206948625U (en) | 2017-06-29 | 2017-06-29 | A kind of stereo sound field calibrator (-ter) unit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107172568A (en) * | 2017-06-29 | 2017-09-15 | 深圳市泰衡诺科技有限公司上海分公司 | A kind of stereo sound field calibrator (-ter) unit and calibration method |
| CN109803218A (en) * | 2019-01-22 | 2019-05-24 | 北京雷石天地电子技术有限公司 | Sound field of loudspeaker equilibrium automatic calibrating method and device |
-
2017
- 2017-06-29 CN CN201720775073.7U patent/CN206948625U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107172568A (en) * | 2017-06-29 | 2017-09-15 | 深圳市泰衡诺科技有限公司上海分公司 | A kind of stereo sound field calibrator (-ter) unit and calibration method |
| CN107172568B (en) * | 2017-06-29 | 2024-04-05 | 深圳市泰衡诺科技有限公司上海分公司 | Stereo sound field calibration equipment and calibration method |
| CN109803218A (en) * | 2019-01-22 | 2019-05-24 | 北京雷石天地电子技术有限公司 | Sound field of loudspeaker equilibrium automatic calibrating method and device |
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