CN106028248A - Loudspeaker polarity detection method and device - Google Patents
Loudspeaker polarity detection method and device Download PDFInfo
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- CN106028248A CN106028248A CN201610644401.XA CN201610644401A CN106028248A CN 106028248 A CN106028248 A CN 106028248A CN 201610644401 A CN201610644401 A CN 201610644401A CN 106028248 A CN106028248 A CN 106028248A
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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
- H04R29/00—Monitoring arrangements; Testing arrangements
- H04R29/004—Monitoring arrangements; Testing arrangements for microphones
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Abstract
The invention discloses a loudspeaker polarity detection method. The method comprises the steps that a sound corresponding to a first audio signal sent by a detected loudspeaker is controlled; a sound corresponding to a second audio signal sent by the detected loudspeaker is controlled while the detected loudspeaker stops sending out the sound corresponding to the first audio signal, the frequency of the first audio signal is different from the frequency of the second audio signal; a third audio signal is received through a microphone, wherein the third audio signal is the audio signal converted by the sound collected through the microphone; the audio section with the same frequency as the second audio signal is intercepted from the third audio signal; the audio section is compared with the wave form phase of the second audio signal, and according to the comparison result, polarity connection of the detected loudspeaker is normal or not. Correspondingly, the invention further discloses a loudspeaker polarity detection device. By adopting the loudspeaker polarity detection method and device, the phenomenon that any loudspeaker polarity in electronic equipment is connected wrongly can be accurately detected out.
Description
Technical field
The present invention relates to Audiotechnica field, particularly relate to a kind of loudspeaker polarity detection method and device.
Background technology
See Fig. 1, be the loudspeaker wiring schematic diagram in the electronic equipment of band loudspeaker, the positive pole of left horn L with
Audible warning input LOConnect, the positive pole of right horn R and audible warning input ROConnect, left horn
The negative pole of L and right horn R all ground connection.So-called loudspeaker reverse polarity connection, it is simply that refer to the plus earth of loudspeaker and loudspeaker
Negative pole connects audible warning input.
Loudspeaker device for detecting polarity in the market, left horn and right horn to electronic equipment are simultaneously entered
Same audio input signal, and gather the sound of left horn by left mike and gather the right side by right mike
The sound of loudspeaker, and then the sound transitions collected is become audio collection signal (it is waveshape signal), contrast
The phase place of the waveform of the audio collection signal that audio collection signal that left horn is corresponding is corresponding with right horn whether phase
Instead, and if contrary; would illustrate about two loudspeaker have a loudspeaker reverse polarity connection.Above-mentioned detection device can detect
Go out left and right loudspeaker and there is the situation of a loudspeaker reverse polarity connection, but owing to all connecing instead when two, left and right loudspeaker polarity
Or when the most normally connecting, the audio collection signal that audio collection signal that left horn is corresponding is corresponding with right horn
The phase place of waveform is identical, then when detecting that the audio collection signal that left horn is corresponding is corresponding with right horn
The phase place of waveform of audio collection signal just cannot be distinguished by when being identical two, left and right loudspeaker lie prone polarity all connect anti-also
Being all normal situation about connecting, the detection scheme that i.e. above-mentioned detection device provides cannot detect two, left and right
Loudspeaker polarity all connects anti-situation.
Summary of the invention
The embodiment of the present invention proposes a kind of loudspeaker polarity detection method and device, it is possible to detect electronics exactly
The situation of any one loudspeaker reverse polarity connection in equipment.
The loudspeaker polarity detection method that the present invention implements to propose includes:
Control audio signal generator and generate the first audio signal, and control described audio signal generator by institute
State the first audio signal and be sent to tested loudspeaker, send out according to described first audio signal for described tested loudspeaker
Go out the first sound wave；
Stop sending the time point of the first sound wave at described tested loudspeaker, control audio-frequency generator and generate the second sound
Frequently signal, and control described audio signal generator described second audio signal is sent to described tested loudspeaker,
The second sound wave is sent according to described second audio signal for described tested loudspeaker；Described first audio signal
Frequency differs from the frequency of described second audio signal；
The 3rd audio signal is received by mike；Wherein said 3rd audio signal is will by described mike
The audio signal that described first sound wave collected and described second sound wave are converted into chronologically；
The audio section with the described second same frequency of audio signal is intercepted from described 3rd audio signal；
The waveform phase of described audio section with described second audio signal is compared, and judges according to comparative result
The polarity of described tested loudspeaker connects the most normal.
Further, the described waveform phase by described audio section with described second audio signal compares, and root
Judge that the polarity of described tested loudspeaker connects according to comparative result the most normal, particularly as follows:
Described audio section is the most consistent with the waveform phase of described second audio signal；
The most then judge that the polarity of described tested loudspeaker connects normal；
If it is not, then judge that the polarity of described tested loudspeaker connects instead.
Further, described loudspeaker polarity detection method also includes:
When the polarity judging described tested loudspeaker connects inverse time, generate alarm control signal；
Alarming processing is made according to described alarm control signal.
Yet further, the frequency of described first audio signal is higher than the frequency of described second audio signal.
Further, described first audio signal, described second audio signal and described 3rd audio signal
It is simple harmonic wave signal.
Correspondingly the embodiment of the present invention also provides for a kind of loudspeaker device for detecting polarity, including:
First audio-frequency module, is used for controlling audio signal generator and generates the first audio signal, and control described
Described first audio signal is sent to tested loudspeaker by audio signal generator, for described tested loudspeaker according to
Described first audio signal sends the first sound wave；
Second audio-frequency module, for stopping sending the time point of the first sound wave at described tested loudspeaker, controls sound
Frequency generator generates the second audio signal, and controls described audio signal generator by described second audio signal
It is sent to described tested loudspeaker, sends the second sound wave for described tested loudspeaker according to described second audio signal；
The frequency of described first audio signal differs from the frequency of described second audio signal；
Audio frequency receiver module, for receiving the 3rd audio signal by mike；Wherein said 3rd audio frequency letter
Number it is the sound described first sound wave collected and described second sound wave being converted into chronologically by described mike
Frequently signal；
Audio frequency interception module, same with described second audio signal for intercepting from described 3rd audio signal
The audio section of frequency；
Phase bits comparison module, for the waveform phase of described audio section with described second audio signal is compared,
And judge that the polarity of described tested loudspeaker connects the most normal according to comparative result.
Further, described phase bits comparison module specifically includes:
Comparing unit, for comparing the waveform phase of described audio section and described second audio signal whether
Cause；
First judging unit, is used for when described audio section is consistent with the waveform phase of described second audio signal,
Judge that the polarity of described tested loudspeaker connects normal；
Second judging unit, is used for when described audio section is inconsistent with the waveform phase of described second audio signal
Time, it is judged that the polarity of described tested loudspeaker connects instead.
Further, described loudspeaker device for detecting polarity also includes:
Warning signal generation module, for when judging that the polarity of described tested loudspeaker connects inverse time, generating and accuse
Alert control signal；
Warning processing module, for making alarming processing according to described alarm control signal.
Yet further, the frequency of described first audio signal is higher than the frequency of described second audio signal.
Further, described first audio signal, described second audio signal and described 3rd audio signal
It is simple harmonic wave signal.
Implement the embodiment of the present invention, have the advantages that
The loudspeaker polarity detection method of embodiment of the present invention offer and device, control tested loudspeaker and continuously sending out
After first sound wave a period of time, control tested loudspeaker and stop sending the first sound wave and sending the second sound wave at once,
Wherein, the first sound wave is the sound being converted into by the first audio signal, and the second sound wave is by the second audio signal
The sound being converted into, then the first sound wave received and the second sound wave are changed the 3rd audio signal by mike,
This 3rd audio signal comprises an identifier, is and the wave band of the first same frequency of audio signal and with second
The critical point of the genuine wave band of the same frequency of audio signal, thus when starting to intercept and the second audio frequency letter from critical point
During the audio section of number same frequency, the waveform of this audio section and the waveform of the second audio signal have same initial
Identifier, and then can judge that the phase place of two waveforms is the most consistent exactly based on the position that this origin identification accords with,
Such that it is able to judge that the polarity of tested loudspeaker connects the most normal directly and accurately.
Accompanying drawing explanation
Fig. 1 is the loudspeaker wiring schematic diagram in the electronic equipment of band loudspeaker；
Fig. 2 is the schematic flow sheet of an embodiment of the loudspeaker polarity detection method that the present invention provides；
Fig. 3 is the structural representation of an embodiment of the loudspeaker polarity detection system that the present invention provides；
Fig. 4 is the structural representation of an embodiment of the loudspeaker device for detecting polarity that the present invention provides；
Fig. 5 is the knot of an embodiment of the phase bits comparison module of the loudspeaker device for detecting polarity that the present invention provides
Structure schematic diagram.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clearly
Chu, be fully described by, it is clear that described embodiment be only a part of embodiment of the present invention rather than
Whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creation
The every other embodiment obtained under property work premise, broadly falls into the scope of protection of the invention.
See Fig. 2, be the schematic flow sheet of an embodiment of the loudspeaker polarity detection method that the present invention provides,
This loudspeaker polarity detection method is performed by processor, including step S1 to S5, specific as follows:
S1, controls audio signal generator and generates the first audio signal, and control described audio signal generator
Described first audio signal is sent to tested loudspeaker, for described tested loudspeaker according to described first audio frequency letter
Number send the first sound wave；
S2, stops sending the time point of the first sound wave at described tested loudspeaker, controls audio-frequency generator and generates the
Two audio signals, and control described audio signal generator described second audio signal is sent to described tested
Loudspeaker, send the second sound wave for described tested loudspeaker according to described second audio signal；Described first audio frequency
The frequency of signal differs from the frequency of described second audio signal；
S3, receives the 3rd audio signal by mike；Wherein said 3rd audio signal is by described Mike
The audio signal that described first sound wave collected and described second sound wave are converted into by wind chronologically；
S4, intercepts the audio section with the described second same frequency of audio signal from described 3rd audio signal；
S5, compares the waveform phase of described audio section with described second audio signal, and according to comparative result
Judge that the polarity of described tested loudspeaker connects the most normal.
The loudspeaker polarity detection method of above-mentioned offer, controls tested loudspeaker when continuously sending out the first sound wave one section
After between, continue to control tested loudspeaker and stop sending the first sound wave and sending the second sound wave, wherein, first at once
Sound wave is the sound being converted into by the first audio signal, and the second sound wave is the sound being converted into by the second audio signal
Sound, the first sound wave received and the second sound wave are changed the 3rd audio signal, this 3rd audio frequency letter by mike
Number comprise an identifier, i.e. with the wave band of the first same frequency of audio signal and with the second same frequency of audio signal
The critical point of the wave band of rate, thus when intercepting from the 3rd audio signal and the second same frequency of audio signal
During audio section, the waveform of this audio section and the waveform of the second audio signal have same origin identification symbol, and then
Can judge that the phase place of two waveforms is the most consistent exactly based on the position that this origin identification accords with, thus the most accurate
Ground judges that the polarity of tested loudspeaker connects the most normal.
It addition, after receiving the 3rd audio signal by mike, in addition it is also necessary to the 3rd audio signal is entered
Row noise reduction process, reduces the external noise impact on the 3rd audio signal.
Further, the specific implementation process of above-mentioned steps S5 is:
Described audio section is the most consistent with the waveform phase of described second audio signal；
The most then judge that the polarity of described tested loudspeaker connects normal；
If it is not, then judge that the polarity of described tested loudspeaker connects instead.
It should be noted that the waveform tool of the audio section now intercepted and described both second audio signals
There is same initial initial point, then can judge that the phase place between two waveforms is the most consistent directly and accurately.
Further, described connect inverse time by the polarity of loudspeaker when detecting, can carry out at corresponding warning
Amount processes, thus described loudspeaker polarity detection method also includes:
When the polarity judging described tested loudspeaker connects inverse time, generate alarm control signal；
Alarming processing is made according to described alarm control signal.
Alarming processing has various ways, as a kind of preferred embodiment, when detecting the polarity of tested loudspeaker even
Connecing inverse time, processor can generate alarm control signal control alarm lamp and carry out highlighted flicker warning, or
Person controls an alarming horn and sounds a buzzer and report to the police, and controls to carry out during display to show current
Testing result.
Preferably, the frequency of described first audio signal is higher than the frequency of described second audio signal.
It should be noted that due to arrange first audio signal purpose before the second audio signal be in order to
The audio section with the second same frequency of audio signal is being intercepted exactly, then need from the 3rd audio signal
The frequency of the first audio signal to differ from the frequency of the second audio signal, the frequency of the preferably first audio signal
It is the several times of the frequency of the second audio signal, and the frequency of the second audio signal is preferably low frequency, such as
100Hz, low frequency signal is beneficial to judge the phase place of waveform.It addition, the first audio signal and the second audio signal
Frequency need to be within the Hz-KHz of tested loudspeaker.
Preferably, described first audio signal, described second audio signal and described 3rd audio signal are
Simple harmonic wave signal, but it is not limited to simple harmonic wave signal, also include other waveshape signals, such as square wave.
Below by use first audio signal sine wave signal as 10000Hz, the second audio signal is
The sine wave signal of 100Hz detects the polarity of any one loudspeaker in television set 03 and connects the most just frequently as example
Son, in conjunction with the structural representation of an embodiment of the loudspeaker polarity detection system that Fig. 3 provides, illustrates
Illustrate:
Step 1: loudspeaker device for detecting polarity and tested television set 03 are placed in quiet room, so that detection
Device by mike 04 receive the sound that the loudspeaker of tested television set 03 send (above-mentioned first sound wave and
Second sound wave) less by external interference；Mike 04 is placed on the loudspeaker of tested television set 03 (with the right side
As a example by the loudspeaker of sound channel) current, in order to gather the sound that loudspeaker send.
Step 2: by the audio input end of the audio signal output end of audio signal generator 02 Yu television set 03
(such as HDMI port or USB port) connects.
Step 3: it is the sine wave of 10000Hz that processor 01 controls audio signal generator 02 output frequency
As the first audio signal, the loudspeaker of tested television set 03 cause diaphragm under the effect of this first audio signal
Vibration, send the sound of the first sound wave, after continuously sending out for the first sound wave certain time, at processor
While 01 controls audio signal generator 02 stopping output the first audio signal, processor 01 controls audio frequency
Signal generator 02 starts sine wave that output frequency is 100Hz as the second audio signal, tested television set
The loudspeaker of 03 stop sending the first sound wave, meanwhile cause shaking of diaphragm under the effect of the second audio signal
Dynamic, send the sound of the second sound wave.
Step 4: processor 01, while control audio signal generator 02 exports above-mentioned audio signal, is controlled
Mike 04 processed gather sound that the loudspeaker of tested television set 03 are sent (i.e. gather above-mentioned first sound wave and
The sound of the second sound wave), the sound collected is converted into the 3rd audio signal and sends process to by mike 04
Device 01.
Step 5: processor 01 carries out noise reduction process to the 3rd audio signal received, from described 3rd sound
Frequently the band end point with the described first same frequency of audio signal of signal starts to intercept follow-up audio section and enters
Next step judgement of row.
Step 6: judge that the audio section intercepted is the most consistent (also with the waveform phase of described second audio signal
Whether the audio section that can determine whether described intercepting is sine waveform), when the audio section and described second of described intercepting
(when the audio section intercepted is for be not sine waveform but cosine when the waveform phase of audio signal is inconsistent
During waveform), then judge that the loudspeaker polarity of tested television set 03 connects instead, and perform step 7；And work as institute
(when the audio section intercepted is for just when the audio section of intercepting is consistent with the waveform phase of described second audio signal
During sinusoidal waveform), then sentence and write the loudspeaker polarity connection of tested television set 03 normally.
Step 7: when the loudspeaker polarity detecting tested television set 03 connects inverse time, control alarm lamp
05 reports to the police.
It should be noted that the same loudspeaker of tested television set are all detected by the process of the example above, if
Detect the polarity connection of the left and right sides loudspeaker of tested television set, left and right mike can be respectively provided with, point
Other left side the 3rd audio signal to receiving and right side the 3rd audio signal detect, its detecting step with
Above-mentioned detection process is similar to, and does not repeats them here.
The loudspeaker polarity detection method that the embodiment of the present invention provides, controls tested loudspeaker and is continuously sending out the first sound
After ripple a period of time, control tested loudspeaker and stop sending the first sound wave and sending the second sound wave at once, wherein,
First sound wave is the sound being converted into by the first audio signal, and the second sound wave is to be converted into by the second audio signal
Sound, then the first sound wave received and the second sound wave are changed the 3rd audio signal by mike, and this is the 3rd years old
Audio signal comprises an identifier, is the wave band with the first same frequency of audio signal and believes with the second audio frequency
The critical point of number genuine wave band of same frequency, thus same with the second audio signal when start to intercept from critical point
During the audio section of frequency, the waveform of this audio section and the waveform of the second audio signal have same origin identification symbol,
And then can judge that the phase place of two waveforms is the most consistent exactly based on the position that this origin identification accords with, such that it is able to
Judge that the polarity of tested loudspeaker connects the most normal directly and accurately.
See Fig. 4, be the structural representation of an embodiment of the loudspeaker device for detecting polarity that the present invention provides,
This detection device can realize whole flow processs of the loudspeaker polarity detection method that above-described embodiment provides, and this detection fills
It is set to floppy disk system and is arranged in the middle of processor, this loudspeaker device for detecting polarity, including:
First audio-frequency module 10, is used for controlling audio signal generator and generates the first audio signal, and control institute
State audio signal generator and described first audio signal is sent to tested loudspeaker, for described tested loudspeaker root
The first sound wave is sent according to described first audio signal；
Second audio-frequency module 20, for stopping sending the time point of the first sound wave at described tested loudspeaker, controls
Audio-frequency generator generates the second audio signal, and controls described audio signal generator by described second audio frequency letter
Number it is sent to described tested loudspeaker, sends the rising tone for described tested loudspeaker according to described second audio signal
Ripple；The frequency of described first audio signal differs from the frequency of described second audio signal；
Audio frequency receiver module 30, for receiving the 3rd audio signal by mike；Wherein said 3rd audio frequency
Signal is described first sound wave collected and described second sound wave to be converted into chronologically by described mike
Audio signal；
Audio frequency interception module 40, same with described second audio signal for intercepting from described 3rd audio signal
The audio section of one frequency；
Phase bits comparison module 50, for the waveform phase of described audio section with described second audio signal is compared,
And judge that the polarity of described tested loudspeaker connects the most normal according to comparative result.
Further, as it is shown in figure 5, the phase place ratio of the loudspeaker device for detecting polarity that Fig. 5 is the present invention to be provided
The structural representation of one embodiment of relatively module, this phase bits comparison module 50 specifically includes:
By the waveform phase of described audio section and described second audio signal whether comparing unit 51, for comparing
Unanimously；
First judging unit 52, is used for when described audio section is consistent with the waveform phase of described second audio signal
Time, it is judged that the polarity of described tested loudspeaker connects normal；
Second judging unit 53, for differing when the waveform phase of described audio section with described second audio signal
During cause, it is judged that the polarity of described tested loudspeaker connects instead.
Further, described loudspeaker device for detecting polarity also includes:
Warning signal generation module 60, for when judging that the polarity of described tested loudspeaker connects inverse time, generates
Alarm control signal；
Warning processing module 70, for making alarming processing according to described alarm control signal.
Yet further, the frequency of described first audio signal is higher than the frequency of described second audio signal.
Further, described first audio signal, described second audio signal and described 3rd audio signal
It is simple harmonic wave signal.
The loudspeaker device for detecting polarity that the embodiment of the present invention provides, is continuously sending out first controlling tested loudspeaker
After sound wave a period of time, control tested loudspeaker and stop sending the first sound wave and sending the second sound wave at once, wherein,
First sound wave is the sound being converted into by the first audio signal, and the second sound wave is to be converted into by the second audio signal
Sound, then the first sound wave received and the second sound wave are changed the 3rd audio signal by mike, and this is the 3rd years old
Audio signal comprises an identifier, is the wave band with the first same frequency of audio signal and believes with the second audio frequency
The critical point of number genuine wave band of same frequency, thus same with the second audio signal when start to intercept from critical point
During the audio section of frequency, the waveform of this audio section and the waveform of the second audio signal have same origin identification symbol,
And then can judge that the phase place of two waveforms is the most consistent exactly based on the position that this origin identification accords with, such that it is able to
Judge that the polarity of tested loudspeaker connects the most normal directly and accurately.
One of ordinary skill in the art will appreciate that all or part of flow process realizing in above-described embodiment method,
Can be by computer program and complete to instruct relevant hardware, described program can be stored in a calculating
In machine read/write memory medium, this program is upon execution, it may include such as the flow process of the embodiment of above-mentioned each method.
Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory,
Or random store-memory body (Random Access Memory, RAM) etc. ROM).
The above is the preferred embodiment of the present invention, it is noted that for the common skill of the art
For art personnel, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, this
A little improvements and modifications are also considered as protection scope of the present invention.
Claims (10)
1. a loudspeaker polarity detection method, it is characterised in that including:
Control audio signal generator and generate the first audio signal, and control described audio signal generator by institute
State the first audio signal and be sent to tested loudspeaker, send out according to described first audio signal for described tested loudspeaker
Go out the first sound wave；
Stop sending the time point of the first sound wave at described tested loudspeaker, control audio-frequency generator and generate the second sound
Frequently signal, and control described audio signal generator described second audio signal is sent to described tested loudspeaker,
The second sound wave is sent according to described second audio signal for described tested loudspeaker；Described first audio signal
Frequency differs from the frequency of described second audio signal；
The 3rd audio signal is received by mike；Wherein said 3rd audio signal is will by described mike
The audio signal that described first sound wave collected and described second sound wave are converted into chronologically；
The audio section with the described second same frequency of audio signal is intercepted from described 3rd audio signal；
The waveform phase of described audio section with described second audio signal is compared, and judges according to comparative result
The polarity of described tested loudspeaker connects the most normal.
2. loudspeaker polarity detection method as claimed in claim 1, it is characterised in that described by described audio frequency
Section compares with the waveform phase of described second audio signal, and judges described tested loudspeaker according to comparative result
Polarity connects the most normal, particularly as follows:
Described audio section is the most consistent with the waveform phase of described second audio signal；
The most then judge that the polarity of described tested loudspeaker connects normal；
If it is not, then judge that the polarity of described tested loudspeaker connects instead.
3. loudspeaker polarity detection method as claimed in claim 2, it is characterised in that also include:
When the polarity judging described tested loudspeaker connects inverse time, generate alarm control signal；
Alarming processing is made according to described alarm control signal.
4. loudspeaker polarity detection method as claimed in claim 1, it is characterised in that described first audio frequency letter
Number frequency higher than the frequency of described second audio signal.
5. loudspeaker polarity detection method as claimed in claim 1, it is characterised in that described first audio frequency letter
Number, described second audio signal and described 3rd audio signal be simple harmonic wave signal.
6. a loudspeaker device for detecting polarity, it is characterised in that including:
First audio-frequency module, is used for controlling audio signal generator and generates the first audio signal, and control described
Described first audio signal is sent to tested loudspeaker by audio signal generator, for described tested loudspeaker according to
Described first audio signal sends the first sound wave；
Second audio-frequency module, for stopping sending the time point of the first sound wave at described tested loudspeaker, controls sound
Frequency generator generates the second audio signal, and controls described audio signal generator by described second audio signal
It is sent to described tested loudspeaker, sends the second sound wave for described tested loudspeaker according to described second audio signal；
The frequency of described first audio signal differs from the frequency of described second audio signal；
Audio frequency receiver module, for receiving the 3rd audio signal by mike；Wherein said 3rd audio frequency letter
Number it is the sound described first sound wave collected and described second sound wave being converted into chronologically by described mike
Frequently signal；
Audio frequency interception module, same with described second audio signal for intercepting from described 3rd audio signal
The audio section of frequency；
Phase bits comparison module, for the waveform phase of described audio section with described second audio signal is compared,
And judge that the polarity of described tested loudspeaker connects the most normal according to comparative result.
7. loudspeaker device for detecting polarity as claimed in claim 6, it is characterised in that described phase bit comparison mould
Block specifically includes:
Comparing unit, for comparing the waveform phase of described audio section and described second audio signal whether
Cause；
First judging unit, is used for when described audio section is consistent with the waveform phase of described second audio signal,
Judge that the polarity of described tested loudspeaker connects normal；
Second judging unit, is used for when described audio section is inconsistent with the waveform phase of described second audio signal
Time, it is judged that the polarity of described tested loudspeaker connects instead.
8. loudspeaker device for detecting polarity as claimed in claim 7, it is characterised in that also include:
Warning signal generation module, for when judging that the polarity of described tested loudspeaker connects inverse time, generating and accuse
Alert control signal；
Warning processing module, for making alarming processing according to described alarm control signal.
9. loudspeaker device for detecting polarity as claimed in claim 6, it is characterised in that described first audio frequency letter
Number frequency higher than the frequency of described second audio signal.
10. loudspeaker device for detecting polarity as claimed in claim 9, it is characterised in that described first audio frequency
Signal, described second audio signal and described 3rd audio signal are simple harmonic wave signal.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107172557A (en) * | 2017-06-02 | 2017-09-15 | 北京小米移动软件有限公司 | Loudspeaker and receiver polarity detection method and device |
| CN110033788A (en) * | 2019-04-02 | 2019-07-19 | 上海帆声图像科技有限公司 | A kind of sound detection method, apparatus and system showing equipment |
| CN111065038A (en) * | 2019-12-31 | 2020-04-24 | 深圳市潮流网络技术有限公司 | Method for detecting polarity of loudspeaker of multi-loudspeaker equipment, corresponding equipment and conference system |
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| CN107172557A (en) * | 2017-06-02 | 2017-09-15 | 北京小米移动软件有限公司 | Loudspeaker and receiver polarity detection method and device |
| CN107172557B (en) * | 2017-06-02 | 2020-01-07 | 北京小米移动软件有限公司 | Method and device for detecting polarity of loudspeaker and receiver |
| CN110033788A (en) * | 2019-04-02 | 2019-07-19 | 上海帆声图像科技有限公司 | A kind of sound detection method, apparatus and system showing equipment |
| CN111065038A (en) * | 2019-12-31 | 2020-04-24 | 深圳市潮流网络技术有限公司 | Method for detecting polarity of loudspeaker of multi-loudspeaker equipment, corresponding equipment and conference system |
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| CN106028248B (en) | 2018-11-13 |
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