CN106507263B - Loudspeaker exception sound detecting circuit device and detection method based on adaptive-filtering - Google Patents
Loudspeaker exception sound detecting circuit device and detection method based on adaptive-filtering Download PDFInfo
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- CN106507263B CN106507263B CN201611240594.9A CN201611240594A CN106507263B CN 106507263 B CN106507263 B CN 106507263B CN 201611240594 A CN201611240594 A CN 201611240594A CN 106507263 B CN106507263 B CN 106507263B
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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
- H04R29/001—Monitoring arrangements; Testing arrangements for loudspeakers
Abstract
Loudspeaker exception sound detecting circuit device disclosed by the invention based on adaptive-filtering, including pumping signal generation module, response signal acquisition module, abnormal sound signal enhancing module, the heavy playback module of loudspeaker and the control module combined.Human ear easier can tell abnormal sound by loudspeaker, can reduce the working strength of audition person, mitigate hearing impairment, also can guarantee that the accuracy and consistency of test result promote the synthesized competitiveness of enterprise to improve the quality of electro-acoustic product.A kind of method of loudspeaker exception sound detection, judge whether loudspeaker contains abnormal sound using succinct, accurate method, the response signal received by measuring microphone, after gained electric signal is amplified, is filtered, do identification algorithm, or by speaker playback, recognized by audition person, whether comprehensive descision loudspeaker contains abnormal sound.
Description
Technical field
The invention belongs to electroacoustic detection technique fields, are related to a kind of loudspeaker exception sound detection electricity based on adaptive-filtering
Road device, the invention further relates to the detection methods of above-mentioned detection circuit device.
Background technique
Loudspeaker is a kind of energy transducer for electric signal being changed into acoustical signal, it is the core of various sound amplifiers
Part, its performance influence the playback of voice signal very big.As scientific and technological level is continuously improved, people get over the product of high quality
More pay attention to, the especially requirement to loudspeaker tonequality impression is also higher and higher.In the production process of loudspeaker, abnormal sound inspection
The key link for having become electro-acoustic element quality testing is surveyed, directly determines the quality of product quality.
Since loading error, fault in material and impurity such as are mixed at many reasons, cause loudspeaker sending to be different from qualification and raise
The sound of sound device, referred to as loudspeaker abnormal sound.Common abnormal sound be divided into " wipe circle " (conducting magnetic column is touched in coil movement),
" foreign matter " (iron powder or other foreign matters are inside loudspeaker magnetic gap), " routing " (cone or vibrating diaphragm touch lead during exercise) and
" excessive glue " (extra glue at ring or centring disk) etc..The loudspeaker for issuing abnormal sound belongs to substandard product, manufacturing enterprise
It must all be detected.
Domestic loudspeaker manufacturing enterprise is all made of the method detection loudspeaker abnormal sound of the direct audition of human ear at present, still
Since audition person is influenced by the factors such as skills involved in the labour, body and emotional status and work fatigue degree, to the master of sound quality
Perception is larger by difference, therefore is difficult to judge that loudspeaker whether there is abnormal sound with a stable and consistent standard, thus
Enterprises production efficiency and product quality is caused to be difficult to further increase.
Summary of the invention
The purpose of the present invention is to provide a kind of loudspeaker exception sound detecting circuit device based on adaptive-filtering, the dress
It sets and can guarantee loudspeaker exception sound detection result accurately and consistently.
It is another object of the present invention to provide a kind of methods of loudspeaker exception sound detection.
The technical scheme adopted by the invention is that the loudspeaker exception sound detecting circuit device based on adaptive-filtering, packet
It includes and module, abnormal sound signal enhancing module, loudspeaker is obtained by the sequentially connected pumping signal generation module of conducting wire, response signal
Heavy playback module and control module.
The features of the present invention also characterized in that
Pumping signal generation module includes programme-controlled signal source, and programme-controlled signal source connects with program-controlled power amplifier a and ground respectively
It connects；
It includes sound attenuator a and microphone amplifier a interconnected that response signal, which obtains module, is provided in sound attenuator a
Loudspeaker a and microphone a, loudspeaker a respectively with program-controlled power amplifier a and connect, microphone a and microphone amplifier a
Connection；
Abnormal sound signal enhancing module includes program-controlled bandstop filter, program-controlled bandstop filter respectively with microphone amplifier a
It is connected with power amplifier；
The heavy playback module of loudspeaker includes power amplifier and the worn earphone of audition person a；
Control module includes MCU module, and MCU module is separately connected pumping signal generation module and abnormal sound by control port
Signal enhancing module.
Pumping signal generation module includes sequentially connected signal generation module, D/A converter a and program-controlled power amplifier
b；
It includes sound attenuator b and microphone amplifier b interconnected that response signal, which obtains module, is provided in sound attenuator b
Loudspeaker b and microphone b, loudspeaker b respectively with program-controlled power amplifier b and connect, microphone b and microphone amplifier b
Connection；
Abnormal sound signal enhancing module includes sequentially connected A/D converter, buffer area and sef-adapting filter；
The heavy playback module of loudspeaker includes sequentially connected D/A converter b, program-controlled power amplifier c and audition person b institute
Earphone is worn, is connect after D/A converter b and the connection of identification algorithm module with sef-adapting filter；
Control module includes synchronous/asynchronous control module, synchronous/asynchronous control module by control port respectively with excitation
Signal generator module, abnormal sound signal enhancing module are connected with the heavy playback module of loudspeaker.
Another technical solution of the present invention is a kind of method of loudspeaker exception sound detection, using based on certainly
The loudspeaker exception sound detecting circuit device of adaptive filtering, is specifically implemented according to the following steps:
Step 1, pumping signal generation module provide frequency controllable pumping signal；
Programme-controlled signal source generates the controllable swept-frequency signal of frequency, and is amplified by program-controlled power amplifier a；
Step 2, response signal obtain module and get response signal；
Amplified signal drive the speaker a generates acoustical signal, and received acoustical signal is switched to electric signal by microphone a, passes through
Program-controlled bandstop filter is transmitted to after microphone amplifier a, loudspeaker a and microphone a need to carry out the playback of sound in sound attenuator a
And reception, to reduce the interference of the noise bring as caused by external environment；
Step 3, while using swept-frequency signal excitation loudspeaker a, abnormal sound signal enhancing module believes the response of acquisition
Number it is transmitted to program-controlled bandstop filter, the effect of program-controlled bandstop filter is the signal filtered out with pumping signal with frequency, finally will
Residual signal is input in power amplifier and amplifies；
Step 4 judges loudspeaker with the presence or absence of abnormal sound.
The features of the present invention also characterized in that
Step 4 specifically: by the residual signal obtained in step 3 pass through loudspeaker heavy playback module, by audition person a Lai
The abnormal sound situation for directly judging loudspeaker to be measured is listened to by experienced audition person and collects several fault samples as to be measured
Device, then audition is carried out by audition person a and illustrates loudspeaker to be detected if hearing the sound unrelated with exciting signal frequency
There are abnormal sounds, if audition person a is only hearing sound relevant to exciting signal frequency, illustrate that loudspeaker to be detected is not present
Abnormal sound；
Programme-controlled signal source and the operation of program-controlled bandstop filter modules Frequency Synchronization are controlled by MCU module, through step 2
Obtain the signal without outside noise be admitted to program-controlled bandstop filter, according to the frequency range 20 of pumping signal~
20000Hz sets the centre frequency and bandwidth of program-controlled bandstop filter, sets the centre frequency and bandwidth of program-controlled bandstop filter
Principle are as follows: the centre frequency that program-controlled bandstop filter is controlled by MCU module guarantees the centre frequency of program-controlled bandstop filter
It is consistent with the frequency of pumping signal that programme-controlled signal source generates；The signal with pumping signal with frequency is filtered out, abnormal sound signal is obtained, it will
It is come out, is differentiated by audition person's a audition, if hearing the sound unrelated with exciting signal frequency by Headphone reproducing after the amplification of abnormal sound signal
Sound, then illustrating loudspeaker to be detected, there are abnormal sounds, if audition person a is only hearing sound relevant to exciting signal frequency,
Illustrating loudspeaker to be detected, there is no abnormal sounds.
Third technical solution of the present invention is a kind of method of loudspeaker exception sound detection, using based on certainly
The loudspeaker exception sound detecting circuit device of adaptive filtering, is specifically implemented according to the following steps:
Step 1, pumping signal generation module provide frequency controllable pumping signal；
Swept-frequency signal is generated by signal generation module, carries out digital-to-analogue conversion using D/A converter a, and by the mould of generation
Quasi- signal is amplified by program-controlled power amplifier b；
Step 2, response signal obtain module and get response signal；
Enlarged analog signal drive the speaker b generates acoustical signal, and received acoustical signal is switched to telecommunications by microphone b
Number, after microphone b amplifier, using A/D converter carry out analog-to-digital conversion, be stored in buffer area, and through sef-adapting filter at
Reason；
Step 3, while using swept-frequency signal excitation loudspeaker, abnormal sound signal enhancing module believes the response of acquisition
Number, analog-to-digital conversion is carried out first with A/D converter, is stored in buffer area, then handled through sef-adapting filter, adaptive-filtering
The effect of device is the signal filtered out with pumping signal with frequency, and residual signal is finally inputted to D/A converter b and program-controlled power respectively
In amplifier c；
Step 4 judges loudspeaker with the presence or absence of abnormal sound.
The features of the present invention also characterized in that
Step 4 specifically: the voice signal to be detected in step 3 is delivered to identification algorithm module and loudspeaker respectively
Weight playback module, identification algorithm module handles abnormal sound signal, using mode identification technology, judge its fault degree and
Fault type, and classify to fault type, the abnormal sound signal after simultaneously amplifying is played by the heavy playback module of loudspeaker
Out, if audition person b hears the sound unrelated with exciting signal frequency, illustrate that there are abnormal sounds for loudspeaker to be detected, if
Audition person b is only hearing sound relevant to exciting signal frequency, then illustrates that loudspeaker to be detected is normal；
Control module includes synchronous/asynchronous control module, control mode that there are two types of synchronous/asynchronous control modules, one is
Asynchronous controlling mode, another kind are synchronous control mode, asynchronous controlling mode:, will after signal generation module issues pumping signal
The signal that microphone receives is stored in buffer area after A/D is converted, and is then handled by sef-adapting filter, output signal can
To repeat to play back, the abnormal sound signal quality of output is higher；Another kind is synchronous control mode: control pumping signal generation module,
The playback sound module synchronization of abnormal sound signal enhancing module and loudspeaker carries out, and the signal that microphone receives passes through after A/D is converted
Sef-adapting filter is handled；Two methods are handled and the sound that plays back is by audition person's b audition, if hearing and pumping signal frequency
The unrelated sound of rate, then illustrate loudspeaker to be detected there are abnormal sound, if audition person b be only hearing it is related to exciting signal frequency
Sound, then illustrate loudspeaker to be detected there is no abnormal sound.
The beneficial effects of the invention are that
1) it will be fallen with pumping signal with the target signal filter of frequency by sef-adapting filter, thus play abnormal sound signal and increase
Strong effect reduces the difficulty of abnormal sound detection.
2) enhanced signal is played back and determines whether to contain abnormal sound using human ear, so that with pumping signal
Signal with frequency substantially weakens, and reduces the working strength of audition person, is conducive to the hearing protection of audition person, convenient for utilizing people's
Subjective Auditory Perception ability recognizes failure mode and degree.
3) by enhanced signal carry out identification algorithm processing, using mode identification technology, judge its fault degree and
Fault type, and classify to fault type.
Detailed description of the invention
Fig. 1 be the present invention is based on analog circuit be main digital circuit supplemented by loudspeaker exception sound detection Installation practice one
Schematic diagram；
Fig. 2 be the present invention is based on digital circuit be main analog circuit supplemented by loudspeaker exception sound detection device embodiment
Two schematic diagrams.
In figure, 1. programme-controlled signal sources, 2. program-controlled power amplifier a, 3. loudspeaker a, 4. microphone a, 5. sound attenuator a, 6.
Microphone amplifier a, 7. program-controlled bandstop filters, 8. power amplifiers, 9. audition person's a, 10.MCU modules, 11. signals generate
Module, the 12.D/A converter loudspeaker of a, 13. program-controlled power amplifier b, 14. b, 15. microphone b, 16. sound attenuator b, 17. pass
Sound device amplifier b, 18.A/D converter, 19. buffer areas, 20. sef-adapting filters, 21. identification algorithm modules, 22.D/A conversion
The device audition person b of b, 23. program-controlled power amplifier c, 24., 25. synchronous/asynchronous control modules.
Specific embodiment
The present invention is described in detail with specific implementation method with reference to the accompanying drawing.
The present invention is based on the loudspeaker exception sound detecting circuit device of adaptive-filtering,
Embodiment one, as shown in Figure 1, include combine pumping signal generation module, response signal obtain module,
Abnormal sound signal enhancing module, the heavy playback module of loudspeaker and control module；
Pumping signal generation module includes programme-controlled signal source 1, programme-controlled signal source 1 respectively with program-controlled power amplifier a2 and ground
Connection；
It includes sound attenuator a5 and microphone amplifier a6 interconnected, setting in sound attenuator a5 that response signal, which obtains module,
Have a loudspeaker a3 and microphone a4, loudspeaker a3 respectively with program-controlled power amplifier a2 and connect, microphone a4 and microphone
Amplifier a6 connection；
Abnormal sound signal enhancing module includes program-controlled bandstop filter 7, program-controlled bandstop filter 7 respectively with microphone amplifier
A6 and power amplifier 8 connect；
The weight playback module of loudspeaker includes power amplifier 8 and the worn earphone of audition person a9；
Control module includes MCU module 10, MCU module 10 by control port be separately connected pumping signal generation module and
Abnormal sound signal enhancing module.
It is a kind of that the sound detection of loudspeaker exception is carried out using the loudspeaker exception sound detecting circuit device based on adaptive-filtering
Method, be specifically implemented according to the following steps:
Step 1, pumping signal generation module provide frequency controllable pumping signal；
Programme-controlled signal source 1 generates the controllable swept-frequency signal of frequency, and is amplified by program-controlled power amplifier a2；
Step 2, response signal obtain module and get response signal；
Amplified signal drive the speaker a3 generates acoustical signal, and received acoustical signal is switched to electric signal by microphone a4,
Be transmitted to program-controlled bandstop filter 7 after microphone amplifier a6, loudspeaker a3 and microphone a4 need in sound attenuator a5 carry out sound
The playback and reception of sound, to reduce the interference of the noise bring as caused by external environment；
Step 3, while using swept-frequency signal excitation loudspeaker a3, abnormal sound signal enhancing module believes the response of acquisition
Number it is transmitted to program-controlled bandstop filter 7, the effect of program-controlled bandstop filter 7 is the signal filtered out with pumping signal with frequency, finally
Residual signal is input in power amplifier 8 and is amplified, thus plays the role of enhancing loudspeaker a3 exception sound signal；
Step 4 judges loudspeaker with the presence or absence of abnormal sound；
By the residual signal obtained in step 3 pass through loudspeaker heavy playback module, directly judged by audition person a9 to
It surveys whether loudspeaker contains abnormal sound, is listened to by experienced audition person and collect several fault samples as device under test, then
Audition is carried out by audition person a9 and illustrates loudspeaking to be detected if audition person a9 hears the sound unrelated with exciting signal frequency
There are abnormal sounds to illustrate loudspeaker to be detected not if audition person a9 is only hearing sound related with exciting signal frequency for device
There are abnormal sounds；
Programme-controlled signal source 1 and the operation of 7 modules Frequency Synchronization of program-controlled bandstop filter, warp are controlled by MCU module 10
Step 2 obtain the signal without outside noise be admitted to program-controlled bandstop filter 7, according to the frequency range 20 of pumping signal~
20000Hz sets the centre frequency and bandwidth of program-controlled bandstop filter 7, sets the centre frequency and band of program-controlled bandstop filter 7
Wide principle are as follows: the centre frequency that program-controlled bandstop filter 7 is controlled by MCU module 10 guarantees in program-controlled bandstop filter 7
Frequency of heart is consistent with the frequency of pumping signal that programme-controlled signal source 1 generates；The signal with pumping signal with frequency is filtered out, abnormal sound is obtained
Signal will be come out by Headphone reproducing after the amplification of abnormal sound signal, be differentiated by audition person's a9 audition, if hearing and exciting signal frequency
Unrelated sound, then illustrate loudspeaker to be detected there are abnormal sound, if audition person a9 be only hearing it is related with exciting signal frequency
Sound, then illustrate loudspeaker to be detected there is no abnormal sound.
Embodiment two, as shown in Fig. 2, include combine pumping signal generation module, response signal obtain module,
Abnormal sound signal enhancing module, the heavy playback module of loudspeaker and control module；
Pumping signal generation module includes that sequentially connected signal generation module 11, D/A converter a12 and program-controlled power are put
Big device b13；
It includes sound attenuator b16 and microphone amplifier b17 interconnected that response signal, which obtains module, in sound attenuator b16
Be provided with loudspeaker b14 and microphone b15, loudspeaker b14 respectively with program-controlled power amplifier b13 and connect, microphone b15
It is connect with microphone amplifier b17；
Abnormal sound signal enhancing module includes sequentially connected A/D converter 18, buffer area 19 and sef-adapting filter 20；
The heavy playback module of loudspeaker includes sequentially connected D/A converter b22, program-controlled power amplifier c23 and audition
Member's worn earphone of b24, D/A converter b22 and identification algorithm module 21 are connect after connecting with sef-adapting filter 20；
Control module includes synchronous/asynchronous control module 25, synchronous/asynchronous control module 25 by control port respectively with
Pumping signal generation module, abnormal sound signal enhancing module are connected with the heavy playback module of loudspeaker.
It is a kind of that the sound detection of loudspeaker exception is carried out using the loudspeaker exception sound detecting circuit device based on adaptive-filtering
Method, be specifically implemented according to the following steps:
Step 1, pumping signal generation module provide frequency controllable pumping signal；
Swept-frequency signal is generated by signal generation module 11, carries out digital-to-analogue conversion using D/A converter a12, and will generate
Analog signal amplified by program-controlled power amplifier b13；
Step 2, response signal obtain module and get response signal；
Enlarged analog signal drive the speaker b14 generates acoustical signal, and received acoustical signal is switched to electricity by microphone b15
Signal carries out analog-to-digital conversion using A/D converter 18 after microphone b15 amplifier, is stored in buffer area 19, and through adaptive
The processing of filter 20, loudspeaker b14 and microphone b15 need to carry out the playback and reception of sound in sound attenuator b16, with reduction by
The interference of noise bring caused by external environment；
Step 3, while using swept-frequency signal excitation loudspeaker, abnormal sound signal enhancing module believes the response of acquisition
Number, analog-to-digital conversion is carried out first with A/D converter 18, is stored in buffer area 19, then handled through sef-adapting filter 20, it is adaptive
The effect for answering filter 20 is the signal filtered out with pumping signal with frequency, and residual signal is finally inputted to D/A converter b22 respectively
In program-controlled power amplifier c23, it can thus play the role of enhancing loudspeaker exception sound signal；
Step 4 judges loudspeaker with the presence or absence of abnormal sound；
Abnormal sound signal in step 3 is delivered to the heavy playback module of identification algorithm module 21 and loudspeaker respectively, is recognized
Algoritic module 21 handles abnormal sound signal, using mode identification technology, judges its fault degree and fault type, and right
Fault type is classified, at the same it is enhanced after abnormal sound signal played back by the heavy playback module of loudspeaker, if audition
Member b24 hears the sound unrelated with exciting signal frequency, then illustrating loudspeaker to be detected, there are abnormal sounds, if audition person b24
It is only hearing sound relevant to exciting signal frequency, then illustrates that loudspeaker to be detected is normal；
Control module includes synchronous/asynchronous control module 25, control mode that there are two types of synchronous/asynchronous control modules 25, and one
Kind is asynchronous controlling mode, and another kind is synchronous control mode, and asynchronous controlling mode: signal generation module issues pumping signal
Afterwards, the signal that microphone receives is stored in buffer area 19 after A/D is converted, is then handled by sef-adapting filter 20,
Output signal can repeat to play back, and the abnormal sound signal quality of output is higher；Another kind is synchronous control mode: control pumping signal
The playback sound module synchronization of generation module, abnormal sound signal enhancing module and loudspeaker carries out, and the signal that microphone receives is through A/D
It is handled after conversion through sef-adapting filter 20；Two methods are handled and the sound that plays back is by audition person's b24 audition, if hearing
The sound unrelated with exciting signal frequency, then illustrating loudspeaker to be detected, there are abnormal sounds, if audition person b24 is only hearing and swashs
The relevant sound of signal frequency is encouraged, then illustrating loudspeaker to be detected, there is no abnormal sounds.
In instrument based on analog circuit, supplemented by digital circuit, swept-frequency signal is issued by signal generation module, is passed through
Drive the speaker makes a sound after power amplifier carries out signal amplification, and the acoustical signal picked up is changed into electricity using a microphone
Then signal amplifies by microphone amplifier, the response signal of amplification is directly fed to belong to the control tape of adaptive-filtering
Filter is hindered, output signal drives through power amplifier, enhanced abnormal sound is reset in earphone (loudspeaker), by audition
Member is recognized.It is then that the response signal that will be picked up collects in the instrument supplemented by analog circuit and based on the digital circuit
In buffer area, by carrying out the processing of abnormal sound adaptive-filtering to collected signal, then put to program-controlled power through D/A conversion
Big device, resets enhanced abnormal sound by earphone (loudspeaker), determines abnormal sound situation using human ear.Human ear (is raised by earphone
Sound device) easier abnormal sound can be told, the working strength of audition person can be reduced, hearing impairment is mitigated, also can guarantee test
As a result accuracy and consistency promote the synthesized competitiveness of enterprise to improve the quality of electro-acoustic product.Due to loudspeaker
Abnormal sound is usually smaller, in order to exclude the interference of ambient noise, to carry out in sound attenuator to the test process of loudspeaker；
Present invention employs succinct, accurate methods to judge whether loudspeaker contains abnormal sound, is connect by measuring microphone
The response signal received after gained electric signal is amplified, is filtered, does identification algorithm, or by speaker playback, by listening
Whether sound person's identification, comprehensive descision loudspeaker contain abnormal sound.
Claims (2)
1. the loudspeaker exception sound detecting circuit device based on adaptive-filtering, which is characterized in that swash including what is combined
Encourage signal generator module, response signal acquisition module, abnormal sound signal enhancing module, the heavy playback module of loudspeaker and control mould
Block；
The pumping signal generation module includes sequentially connected signal generation module (11), D/A converter a (12) and program-controlled function
Rate amplifier b (13)；
It includes sound attenuator b (16) interconnected and microphone amplifier b (17), sound attenuator b (16) that response signal, which obtains module,
Inside be provided with loudspeaker b (14) and microphone b (15), loudspeaker b (14) respectively with program-controlled power amplifier b (13) He Dilian
It connects, microphone b (15) is connect with microphone amplifier b (17)；
Abnormal sound signal enhancing module includes sequentially connected A/D converter (18), buffer area (19) and sef-adapting filter (20)；
The heavy playback module of loudspeaker includes sequentially connected D/A converter b (22), program-controlled power amplifier c (23) and audition
Connect after member's b (24) worn earphone, D/A converter b (22) and identification algorithm module (21) connection with sef-adapting filter (20)
It connects；
Control module includes synchronous/asynchronous control module (25), synchronous/asynchronous control module (25) by control port respectively with
Pumping signal generation module, abnormal sound signal enhancing module are connected with the heavy playback module of loudspeaker.
2. a kind of loudspeaker exception sound detecting circuit device using described in claim 1 based on adaptive-filtering carries out loudspeaking
The method of device exception sound detection, which is characterized in that be specifically implemented according to the following steps:
Step 1, pumping signal generation module provide frequency controllable pumping signal；
Swept-frequency signal is generated by signal generation module (11), carries out digital-to-analogue conversion using D/A converter a (12), and will generate
Analog signal amplified by program-controlled power amplifier b (13)；
Step 2, response signal obtain module and get response signal；
Enlarged analog signal drive the speaker b (14) generates acoustical signal, and received acoustical signal is switched to electricity by microphone b (15)
Signal carries out analog-to-digital conversion using A/D converter (18), is sequentially stored into buffer area (19) after microphone b (15) amplifier,
And it is handled through sef-adapting filter (20)；
Step 3, while using swept-frequency signal excitation loudspeaker, abnormal sound signal enhancing module is first by the response signal of acquisition
Analog-to-digital conversion is carried out first with A/D converter (18), is stored in buffer area (19), then is handled through sef-adapting filter (20), from
The effect of adaptive filter (20) is the signal filtered out with pumping signal with frequency, and residual signal is finally inputted to D/A conversion respectively
In device b (22) and program-controlled power amplifier c (23)；
Step 4 judges loudspeaker with the presence or absence of abnormal sound:
Specifically: the abnormal sound signal in step 3 is delivered to the heavy playback module of identification algorithm module (21) and loudspeaker respectively,
Identification algorithm module (21) handles abnormal sound signal, using mode identification technology, judges its fault degree and failure classes
Type, and classify to fault type, the abnormal sound signal after simultaneously amplifying is played back by the heavy playback module of loudspeaker, if
Audition person b (24) hears the sound unrelated with exciting signal frequency, then illustrating loudspeaker to be detected, there are abnormal sounds, if audition
Member b (24) is only hearing sound relevant to exciting signal frequency, then illustrates that loudspeaker to be detected is normal；
Control module includes synchronous/asynchronous control module (25), control mode that there are two types of synchronous/asynchronous control modules (25), and one
Kind is asynchronous controlling mode, and another kind is synchronous control mode, and asynchronous controlling mode: signal generation module issues pumping signal
Afterwards, it recording and is stored in buffer area (19), then handled by sef-adapting filter (20), output signal can repeat to play back,
The abnormal sound signal quality of output is higher；Another kind is synchronous control mode: control pumping signal generation module, abnormal sound signal enhancing
The playback sound module synchronization of module and loudspeaker carries out, and is handled using sef-adapting filter (20)；After two methods processing
Abnormal sound, illustrate to be detected through audition person b (24) real-time audition if hearing the sound unrelated with exciting signal frequency
There are abnormal sounds to illustrate to be detected raise if audition person b (24) is only hearing sound relevant to exciting signal frequency for loudspeaker
Abnormal sound is not present in sound device.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101115329A (en) * | 2006-07-28 | 2008-01-30 | 天津科技大学 | Time frequency analysis based loudspeaker noise online detecting instrument |
| CN102970646A (en) * | 2012-11-06 | 2013-03-13 | 西安工程大学 | Loudspeaker abnormal sound detection circuit device and detection method based on constant current source power amplification |
| CN104363554A (en) * | 2014-09-29 | 2015-02-18 | 嘉善恩益迪电声技术服务有限公司 | Method for detecting loudspeaker abnormal sounds |
| CN104575510A (en) * | 2015-02-04 | 2015-04-29 | 深圳酷派技术有限公司 | Noise reduction method, noise reduction device and terminal |
| CN105307099A (en) * | 2015-11-11 | 2016-02-03 | 西安工程大学 | System for testing power of loudspeaker and method for testing power and low-frequency parameter |
| CN106033669A (en) * | 2015-03-18 | 2016-10-19 | 展讯通信（上海）有限公司 | Voice identification method and apparatus thereof |
-
2016
- 2016-12-29 CN CN201611240594.9A patent/CN106507263B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101115329A (en) * | 2006-07-28 | 2008-01-30 | 天津科技大学 | Time frequency analysis based loudspeaker noise online detecting instrument |
| CN102970646A (en) * | 2012-11-06 | 2013-03-13 | 西安工程大学 | Loudspeaker abnormal sound detection circuit device and detection method based on constant current source power amplification |
| CN104363554A (en) * | 2014-09-29 | 2015-02-18 | 嘉善恩益迪电声技术服务有限公司 | Method for detecting loudspeaker abnormal sounds |
| CN104575510A (en) * | 2015-02-04 | 2015-04-29 | 深圳酷派技术有限公司 | Noise reduction method, noise reduction device and terminal |
| CN106033669A (en) * | 2015-03-18 | 2016-10-19 | 展讯通信（上海）有限公司 | Voice identification method and apparatus thereof |
| CN105307099A (en) * | 2015-11-11 | 2016-02-03 | 西安工程大学 | System for testing power of loudspeaker and method for testing power and low-frequency parameter |
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