CN210016636U - Loudspeaker abnormal sound test system - Google Patents
Loudspeaker abnormal sound test system Download PDFInfo
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- CN210016636U CN210016636U CN201921276985.5U CN201921276985U CN210016636U CN 210016636 U CN210016636 U CN 210016636U CN 201921276985 U CN201921276985 U CN 201921276985U CN 210016636 U CN210016636 U CN 210016636U
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Abstract
The utility model discloses a different sound test system of speaker, it including: the PC is provided with an excitation signal generating module and an abnormal sound algorithm analyzing module, the signal playing/collecting equipment is electrically connected with the PC, the signal input end of the power amplifier is electrically connected with the signal output end of the signal playing/collecting equipment, the signal output end of the amplifier is electrically connected with the signal input end of the signal playing/collecting equipment, the signal input end of the low-pass filter is electrically connected with the signal output end of the power amplifier, and the signal output end of the high-pass filter is electrically connected with the signal input end of the amplifier; during testing, the signal output end of the low-pass filter and the signal input end of the high-pass filter are respectively electrically connected with the loudspeaker. The loudspeaker abnormal sound testing system can effectively test loudspeaker abnormal sounds, and is high in testing precision, good in testing accuracy and high in testing efficiency.
Description
Technical Field
The utility model relates to a speaker detects technical field, especially relates to a different sound test system of speaker.
Background
In the prior art, the existing speaker abnormal sound detection method has the following two specific modes:
1. the traditional mode is as follows: the listening personnel who are specially trained carry out subjective judgment; the mode of human ear judgment is greatly influenced by subjective emotion, and no specific standard exists for the conclusion given by whether abnormal sound exists in the loudspeaker.
2. Testing equipment: the electro-acoustic testing instrument is used, the sweep frequency signal is played by the loudspeaker to be tested through the control of a computer, the signal is collected through a standard microphone, and the signal is analyzed by a specific algorithm at the computer end, so that the conclusion whether the loudspeaker has abnormal sound is given.
It is specifically pointed out that, for the traditional approach, it has the following drawbacks:
a. long-time listening has great harm to the body and the mind of the listener; therefore, for loudspeaker production and processing enterprises, the mobility of listeners is high, which also invisibly increases the enterprise cost;
b. long-time listening leads to increased misjudgment rate;
c. the traditional mode is greatly influenced by subjective emotion of listeners, and different listeners may give opposite results to the same product;
d. the cultivation of a qualified auditor is very difficult, and the personnel are not recruited well, and the labor cost is high.
Specifically, the method for testing the abnormal sound by using the testing equipment has the following defects:
a. when the test equipment is used for carrying out abnormal sound test by adopting the existing technology, the electric signal needs to be converted into a sound signal through a loudspeaker to be tested, the received sound signal is converted into the electric signal through a microphone, then the electric signal is transmitted into a computer end for analysis, and the steps from computer signal output to signal input are more, so that the external interference is easier to be caused, and the accuracy is reduced;
b. the abnormal sound of the loudspeaker is mostly positioned in a high-frequency section, the energy of the abnormal sound is relatively small, and the energy loss is large by adopting the existing mode, so that the abnormal sound cannot be detected by 100 percent;
c. the accuracy of abnormal sound detection is also affected by the used microphone, and the quality parameters such as sensitivity and linearity of the microphone directly affect the test result.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to prior art not enough and provide a different sound test system of speaker, this different sound test system of speaker can realize testing different sounds of speaker effectively, and the measuring accuracy is high, the test accuracy is good and efficiency of software testing is high.
In order to achieve the above purpose, the present invention is achieved by the following technical solutions.
A loudspeaker abnormal sound testing system comprises:
the PC is provided with an excitation signal generation module and an abnormal sound algorithm analysis module;
the signal playing/collecting device is used for converting and analyzing the excitation signal and collecting the signal and is electrically connected with the PC;
the signal input end of the power amplifier is electrically connected with the signal output end of the signal playing/collecting equipment;
the signal output end of the amplifier is electrically connected with the signal input end of the signal playing/collecting device;
the signal input end of the low-pass filter is electrically connected with the signal output end of the power amplifier;
the signal output end of the high-pass filter is electrically connected with the signal input end of the amplifier;
the sound muffling box is used for placing a loudspeaker; during testing, the signal output end of the low-pass filter and the signal input end of the high-pass filter are respectively electrically connected with the loudspeaker.
The signal playing/collecting device is provided with a D/A converter module and an A/D converter module, an excitation signal generating module of the PC is electrically connected with a signal input end of the D/A converter module, and a signal output end of the D/A converter module is electrically connected with a signal input end of the power amplifier;
the abnormal sound algorithm analysis module of the PC is electrically connected with the signal output end of the A/D converter module, and the signal input end of the A/D converter module is electrically connected with the signal output end of the amplifier.
The utility model has the advantages that: a loudspeaker abnormal sound test system, it including: the PC is provided with an excitation signal generation module and an abnormal sound algorithm analysis module; the signal playing/collecting device is used for converting and analyzing the excitation signal and collecting the signal and is electrically connected with the PC; the signal input end of the power amplifier is electrically connected with the signal output end of the signal playing/collecting equipment; the signal output end of the amplifier is electrically connected with the signal input end of the signal playing/collecting device; the signal input end of the low-pass filter is electrically connected with the signal output end of the power amplifier; the signal output end of the high-pass filter is electrically connected with the signal input end of the amplifier; the sound muffling box is used for placing a loudspeaker; during testing, the signal output end of the low-pass filter and the signal input end of the high-pass filter are respectively electrically connected with the loudspeaker. Through the structural design, the loudspeaker abnormal sound testing system can effectively test the loudspeaker abnormal sound, and is high in testing precision, good in testing accuracy and high in testing efficiency.
Drawings
The invention will be further described with reference to the drawings, but the embodiments in the drawings do not constitute any limitation of the invention.
Fig. 1 is a schematic structural diagram of the present invention.
In fig. 1, included are:
1-PC 2-signal playing/collecting equipment
3-power amplifier 4-amplifier
5-low pass filter 6-high pass filter
7-sound silencing box 8-loudspeaker.
Detailed Description
The present invention will be described with reference to specific embodiments.
As shown in fig. 1, a system for testing abnormal sound of a speaker includes:
the system comprises a PC (personal computer) 1, wherein the PC 1 is provided with an excitation signal generation module and an abnormal sound algorithm analysis module;
the signal playing/collecting device 2 is used for converting and analyzing the excitation signal and collecting the signal, and the signal playing/collecting device 2 is electrically connected with the PC 1;
the signal input end of the power amplifier 3 is electrically connected with the signal output end of the signal playing/collecting device 2;
the signal output end of the amplifier 4 is electrically connected with the signal input end of the signal playing/collecting device 2;
the signal input end of the low-pass filter 5 is electrically connected with the signal output end of the power amplifier 3;
the signal output end of the high-pass filter 6 is electrically connected with the signal input end of the amplifier 4;
the sound muffling box 7 is used for placing a loudspeaker 8 on the sound muffling box 7; during testing, the signal output terminal of the low pass filter 5 and the signal input terminal of the high pass filter 6 are electrically connected to the speaker 8, respectively.
It should be further noted that the signal playing/collecting device 2 is provided with a D/a converter module and an a/D converter module, the excitation signal generating module of the PC 1 is electrically connected with the signal input end of the D/a converter module, and the signal output end of the D/a converter module is electrically connected with the signal input end of the power amplifier 3;
the abnormal sound algorithm analysis module of the PC 1 is electrically connected with the signal output end of the A/D converter module, and the signal input end of the A/D converter module is electrically connected with the signal output end of the amplifier 4.
For the loudspeaker abnormal sound testing system, the following method can be adopted to realize the loudspeaker abnormal sound testing, in particular to a loudspeaker abnormal sound testing method, which comprises the following steps:
a. the excitation signal generating module of the PC 1 inputs the set specific excitation signal to the connected signal acquisition/playing equipment;
b. after receiving the excitation signal, the signal playing/collecting device 2 converts the excitation signal into an analog signal through a D/A converter module in the signal playing/collecting device, and outputs the analog excitation signal to the power amplifier 3;
c. the power amplifier 3 amplifies the analog excitation signal after receiving the analog excitation signal to obtain an amplified analog excitation signal, then the power amplifier 3 outputs the amplified analog excitation signal to the low-pass filter 5, the low-pass filter 5 filters the amplified analog excitation signal, and the filtered analog excitation signal enables a loudspeaker 8 to be tested in the sound muffling box 7 to sound;
d. the electric signals generated by the two ends of the loudspeaker 8 to be tested in the sounding process of the sound eliminating box 7 are input into the high-pass filter 6;
e. the high-pass filter 6 receives the collected signals, filters the collected signals, outputs the collected signals filtered by the high-pass filter 6 to the amplifier 4, amplifies the collected signals after the amplifier 4 receives the collected signals, and inputs the amplified collected signals into the signal collecting/playing device through the amplifier 4;
f. the signal playing/collecting device 2 receives the filtered and amplified collected signal, converts the collected signal into an analog response signal through an A/D converter module in the signal playing/collecting device 2 and outputs the analog response signal to the PC 1, and the PC 1 performs abnormal sound algorithm analysis through an abnormal sound algorithm analysis module.
According to the above conditions, the loudspeaker abnormal sound testing system can effectively test 8 abnormal sounds of the loudspeaker, is high in testing precision, testing accuracy and testing efficiency, can effectively avoid the problem of microphone collection, can detect the abnormal sound problem caused by complex conditions, and further enables the whole testing process to be stable, accurate, rapid and high in testing efficiency.
The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.
Claims (2)
1. A loudspeaker abnormal sound test system is characterized by comprising:
the system comprises a PC (1), wherein the PC (1) is provided with an excitation signal generation module and a different sound algorithm analysis module;
the signal playing/collecting device (2), the signal playing/collecting device (2) is used for converting and analyzing the excitation signal and collecting the signal, and the signal playing/collecting device (2) is electrically connected with the PC (1);
the signal input end of the power amplifier (3) is electrically connected with the signal output end of the signal playing/collecting equipment (2);
the signal output end of the amplifier (4) is electrically connected with the signal input end of the signal playing/collecting device (2);
the signal input end of the low-pass filter (5) is electrically connected with the signal output end of the power amplifier (3);
the signal output end of the high-pass filter (6) is electrically connected with the signal input end of the amplifier (4);
the sound muffling box (7), the sound muffling box (7) is used for placing a loudspeaker (8); during testing, the signal output end of the low-pass filter (5) and the signal input end of the high-pass filter (6) are respectively electrically connected with the loudspeaker (8).
2. The loudspeaker abnormal sound testing system according to claim 1, wherein: the signal playing/collecting device (2) is provided with a D/A converter module and an A/D converter module, an excitation signal generating module of the PC (1) is electrically connected with a signal input end of the D/A converter module, and a signal output end of the D/A converter module is electrically connected with a signal input end of the power amplifier (3);
the abnormal sound algorithm analysis module of the PC (1) is electrically connected with the signal output end of the A/D converter module, and the signal input end of the A/D converter module is electrically connected with the signal output end of the amplifier (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921276985.5U CN210016636U (en) | 2019-08-08 | 2019-08-08 | Loudspeaker abnormal sound test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921276985.5U CN210016636U (en) | 2019-08-08 | 2019-08-08 | Loudspeaker abnormal sound test system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210016636U true CN210016636U (en) | 2020-02-04 |
Family
ID=69319873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921276985.5U Expired - Fee Related CN210016636U (en) | 2019-08-08 | 2019-08-08 | Loudspeaker abnormal sound test system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210016636U (en) |
-
2019
- 2019-08-08 CN CN201921276985.5U patent/CN210016636U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200204 Termination date: 20200808 |