CN113132849A

CN113132849A - Shell type ANC active noise reduction and ENC call noise reduction comprehensive test system

Info

Publication number: CN113132849A
Application number: CN202110543246.3A
Authority: CN
Inventors: 彭洋
Original assignee: Shenzhen Megasig Measurement And Control Technology Co ltd
Current assignee: Shenzhen Megasig Measurement And Control Technology Co ltd
Priority date: 2021-05-19
Filing date: 2021-05-19
Publication date: 2021-07-16

Abstract

The invention discloses a shell type ANC active noise reduction and ENC call noise reduction comprehensive test system, which comprises: the system comprises a testing device, a data acquisition system and a cabinet; the cabinet comprises a support and a protective box, the support comprises a supporting plate, the testing device is arranged above the supporting plate, the data acquisition system is arranged below the supporting plate, and the protective box is coated outside the support; the testing device comprises a sound box support, a sound box, an artificial mouth, an artificial ear and a testing jig, wherein the sound box support and the testing jig are arranged on the supporting plate, the artificial mouth is connected below the sound box support, the artificial ear is fixed on the testing jig, and the sound box is arranged on the sound box support. The invention discloses a shell type ANC active noise reduction and ENC call noise reduction comprehensive test system which can complete ANC active noise reduction and ENC call noise reduction tests at the same time, improve the overall test efficiency, save the field and reduce the labor cost.

Description

Shell type ANC active noise reduction and ENC call noise reduction comprehensive test system

Technical Field

The invention relates to the technical field of noise reduction earphone testing, in particular to a shell type ANC active noise reduction and ENC call noise reduction comprehensive testing system which can complete ANC active noise reduction and ENC call noise reduction testing, improve the overall testing efficiency, save the field and reduce the labor cost.

Background

The Bluetooth earphone applies the Bluetooth technology to the hands-free earphone, so that users can avoid annoying wiring stumbling and can easily talk in various ways. Since the advent of bluetooth headsets, it has been a good tool for the mobile commerce industry to increase efficiency. The voice isolation device can communicate with other people and isolate the sound of the surrounding environment, and is helpful for people who use the voice isolation device in noisy environments such as a recording studio, a DJ, a journey and sports. The earphone is originally used for the telephone and the radio, but with the prevalence of portable electronic devices, the earphone is mostly used for mobile phones, walkmans and radios. Portable electronic games and digital audio players. The earphone single body produced at present generally needs to detect the conventional acoustic parameters, such as frequency loudness, harmonic distortion degree and other functions. In order to further optimize the usage experience of the earphones, ANC technology and ENC technology are also beginning to be applied to the existing earphones, and these technologies also need to go through a series of tests to find out whether the algorithms are effective. ANC technology, namely the active noise reduction function, the principle thereof is as follows: all sounds consist of a certain frequency spectrum which can be completely cancelled if a sound can be found which is exactly the same as the noise to be cancelled, but with exactly opposite phases (180 deg. apart). The key is how to get the sound that cancels the noise. The method actually adopted is as follows: starting from the noise source, the phase of the original noise is reversed through an electronic circuit. ENC technology, namely, ambient noise reduction technology, aims to reduce ambient noise heard by a partner at the time of a call. Common methods are Beamforming, adaptive filtering, and uplink bone conduction. The two noise reduction algorithms have a crucial role in the algorithm constructed by engineers. Therefore, a device is required to test whether the above algorithm is effective.

Therefore, a shell-type ANC active noise reduction and ENC call noise reduction comprehensive test system capable of completing an ANC active noise reduction and ENC call noise reduction test at the same time, improving the overall test efficiency, saving the field and reducing the labor cost is needed.

Disclosure of Invention

The invention aims to provide a shell type ANC active noise reduction and ENC call noise reduction comprehensive test system which can complete ANC active noise reduction and ENC call noise reduction tests at the same time, improve the overall test efficiency, save the field and reduce the labor cost.

In order to achieve the purpose, the technical scheme provided by the invention is as follows: the utility model provides a comprehensive test system that shell formula ANC actively falls and ENC conversation falls in noise, includes: the system comprises a testing device, a data acquisition system and a cabinet;

the cabinet comprises a support and a protective box, the support comprises a supporting plate, the testing device is arranged above the supporting plate, the data acquisition system is arranged below the supporting plate, and the protective box is coated outside the support;

the testing device comprises a sound box support, a sound box, an artificial mouth, an artificial ear and a testing jig, wherein the sound box support and the testing jig are arranged on the supporting plate, the artificial mouth is connected below the sound box support, the artificial ear is fixed on the testing jig, and the sound box is arranged on the sound box support.

The data acquisition system includes: the computer and the data acquisition card are arranged below the supporting plate in a stacked structure.

The computer further comprises a keyboard and a display, the keyboard is arranged in a keyboard box, the keyboard box is arranged in the support in a drawer type structure, and the display is fixed behind the cabinet through a vertical rod.

The test device includes: the testing device comprises an electric appliance control cabinet and an audio/radio frequency isolation box, wherein the electric appliance control cabinet is arranged above the supporting plate, and the audio/radio frequency isolation box is arranged outside the testing device.

The loudspeaker box support comprises four threaded columns, the threaded columns are supported on the supporting plate, and the loudspeaker box support can adjust the height of the loudspeaker box through the threaded columns.

The audio/radio frequency isolation box comprises: the isolation box cover is connected to the isolation box body through a hydraulic cylinder mechanism in a turnover mode.

The isolation box body is also provided with a grating sensor, and the grating sensor is used for detecting whether the isolation box cover is closed in place.

The test fixture comprises a fixture plate, a support column and a clamping arm, wherein the fixture plate is fixedly connected to the supporting plate, the support column is vertically connected to the fixture plate, the clamping arm is horizontally arranged and can be connected to the support column in an up-and-down adjusting mode, and the artificial ear is clamped to the clamping arm.

The lower end of the support column is rotatably connected to the jig plate, the support column is provided with a movable groove in the vertical direction, one end of the clamping arm penetrates through the movable groove and can move up and down in the movable groove, the other end of the clamping arm is provided with a circular groove, and the artificial ear is sleeved into the circular groove to be clamped.

The quantity of pillar, centre gripping arm and artifical ear is two, artifical mouth is located two between the artifical ear.

Compared with the prior art, in the integrated test system for the shell type ANC active noise reduction and the ENC call noise reduction, 1, the sound field environment established by the test system can sequentially test the ANC and ENC functions of the earphone without changing the arrangement of an internal test instrument. The angle between the artificial mouth and the sound box is 90 degrees in the box body, and through the structure, the testing system can meet the sound field environment conditions of different testing items of earphone audio, so that the testing system can test 90% of testing items of the earphone audio on the market, including the testing of the earphones ENC and ANC. The operation that the earphone needs to be frequently taken and placed when the earphone is used for testing ANC and ENC is omitted, and the testing time is greatly saved. 2. The test system adopts a one-to-two design of two boxes of one platform, so that one worker can simultaneously operate the two boxes, the spare time of test operation is effectively reduced, the test efficiency is approximately doubled, and the labor cost is greatly saved.

The invention will become more apparent from the following description when taken in conjunction with the accompanying drawings, which illustrate embodiments of the invention.

Drawings

Fig. 1 is a schematic diagram illustrating an embodiment of a comprehensive test system for active noise reduction and ENC call noise reduction in clamshell ANC according to the present invention.

Fig. 2 is an exploded view of the integrated test system for active noise reduction and ENC call noise reduction of a clamshell ANC as shown in fig. 1.

Fig. 3 is a schematic diagram of the testing apparatus.

Detailed Description

Embodiments of the present invention will now be described with reference to the accompanying drawings. As described above, as shown in fig. 1 and 2, the integrated test system 100 for active noise reduction and ENC call noise reduction in clamshell ANC according to the embodiment of the present invention includes: the test device 10, the data acquisition system 20 and the cabinet 40;

the cabinet 40 includes a support 41 and a protection box 42, the support 41 includes a support plate 411, the testing device 10 is disposed above the support plate 411, the data acquisition system 20 is disposed below the support plate 411, and the protection box 42 is covered outside the support 41;

referring to fig. 3, the testing device 10 includes a speaker bracket 101, a speaker 102, an artificial mouth 103, an artificial ear 104, and a testing fixture 105, wherein the speaker bracket 101 and the testing fixture 105 are both disposed on the supporting plate 411, the artificial mouth 103 is connected below the speaker bracket 101, the artificial ear 104 is fixed on the testing fixture 105, and the speaker 102 is disposed on the speaker bracket 101.

It should be noted that the artificial mouth 103 is suspended below the sound box bracket 101, and forms an angle of 90 ° with the sound box 102 in the box, because the testing device 10 includes the sound box 102, the artificial mouth 103, and the artificial ear 104, the sound box 102 is used for simulating ambient noise, the artificial mouth 103 is used for simulating a human mouth, the artificial ear 104 is used for simulating a human ear, a frequency sweep is emitted through the artificial mouth 103, a powder noise signal is emitted through the sound box 102, and a difference value calculation is performed on an energy value of a measurement angle, so as to obtain a noise reduction effect.

In one embodiment, referring to fig. 2, the data acquisition system 20 comprises: the computer 201 and the data acquisition card 202 are disposed below the supporting plate 411 in a stacked structure. The data acquisition card 202 is used for acquiring data acquired by the artificial ear 104 and transmitting the data to the computer 201 for analysis.

In one embodiment, referring to fig. 2, the computer 201 further includes a keyboard 2011 and a display 2012, the keyboard 2011 is disposed in a keyboard housing 2013, the keyboard housing 2013 is disposed in the bracket 41 in a drawer-type configuration, and the display 2012 is fixed to the rear of the cabinet 40 by a vertical rod.

In one embodiment, referring to fig. 2, the test device 10 includes: the electric appliance control cabinet 106 is arranged above the supporting plate 411, and the audio/radio frequency isolation box 107 is arranged outside the testing device 10. The electrical control cabinet 106 is used for accommodating a wiring terminal, a circuit control board and the like, and the audio/radio frequency isolation box 107 is used for isolating interference of external noise to the testing device 10.

In one embodiment, referring to fig. 2 and 3, the speaker holder 101 includes four threaded posts 101a, the threaded posts 101a are supported on the supporting plate 411, and the height of the speaker 102 can be adjusted by the speaker holder 101 through the threaded posts 101 a. The threaded column 101a provides an installation space for installing the artificial mouth 103, and the height of the threaded column 101a is adjustable, so that the installation positions of the sound box 102 and the artificial mouth 103 can be conveniently adjusted,

in one embodiment, referring to fig. 2 and 3, the audio/radio frequency isolation box 107 comprises: the isolation box comprises an isolation box body 1071 and an isolation box cover 1072, wherein the isolation box cover 1072 is connected to the isolation box body 1071 through a hydraulic cylinder mechanism 1073 in a turnable manner, in one embodiment, a flange 1072a is convexly arranged on the isolation box cover 1072, a groove 1071a made of rubber is arranged on the isolation box body 1071, and the flange 1072a is matched with the groove 1071a to realize the sealed connection between the isolation box cover 1072 and the isolation box body 1071. In addition, the hydraulic cylinder mechanism 1073 is used to drive the isolation cover 1072 to open or close from the isolation case 1071.

In one embodiment, referring to fig. 2, the isolation box 1071 is further provided with a grating sensor 1071b, and the grating sensor 1071b is used for detecting whether the isolation box lid 1072 is closed in place. The grating sensor 1071b detects that the isolation box lid 1072 is closed in place, which indicates that the audio/rf isolation box 107 can achieve the audio/rf isolation effect, and can start the audio test.

In one embodiment, referring to fig. 2 and 3, the test fixture 105 includes a fixture plate 1051, a support column 1052 and a clamp arm 1053, the fixture plate 1051 is fixedly connected to the supporting plate 411, the support column 1052 is vertically connected to the fixture plate 1051, the clamp arm 1053 is horizontally arranged and vertically adjustable and connected to the support column 1052, and the artificial ear 104 is clamped on the clamp arm 1053.

In the above embodiment, the lower end of the supporting column 1052 is rotatably connected to the jig plate 1051, the supporting column 1052 is provided with a movable groove 1052a in a vertical direction, one end of the clamping arm 1053 passes through the movable groove 1052a and can move up and down in the movable groove 1052a, and the other end is provided with a circular groove 1052b, and the artificial ear 104 is sleeved in the circular groove 1052b for clamping.

In the above embodiment, the number of the support 1052, the holding arm 1053 and the artificial ear 104 is two, and the artificial mouth 103 is disposed between the two artificial ears 104.

It should be noted that, in this embodiment, the holding arm 1053 can move up and down in the movable groove 1052a to adjust the horizontal height of the artificial ear 104, and the earphone is mounted on the artificial ear 104, so that the vertical distance between the earphone and the artificial mouth 103 can be further adjusted; in addition, since the support 1052 is rotatably connected to the jig plate 1051, the relative distance between two earphones can be adjusted, or the distance between each earphone 104 and the artificial mouth 103 can be adjusted, so that the test effect can be better simulated.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, therefore, the present invention is not limited by the appended claims.

Claims

1. A comprehensive test system for shell type ANC active noise reduction and ENC call noise reduction comprises: the system comprises a testing device, a data acquisition system and a cabinet;

the cabinet comprises a support and a protective box, the support comprises a supporting plate, the testing device is arranged above the supporting plate, the data acquisition system is arranged below the supporting plate, and the protective box is coated outside the support; it is characterized in that the preparation method is characterized in that,

2. The integrated test system for shell-ANC active noise reduction and ENC talk noise reduction of claim 1, wherein the data acquisition system comprises: the computer and the data acquisition card are arranged below the supporting plate in a stacked structure.

3. The integrated test system for active noise reduction and ENC call noise reduction of shell ANC of claim 2, wherein the computer further comprises a keyboard and a display, the keyboard is disposed in a keyboard box, the keyboard box is disposed in the rack in a drawer type structure, and the display is fixed at the rear of the cabinet through a vertical rod.

4. The integrated test system for active noise reduction by clamshell ANC and noise reduction by ENC talk according to claim 1, wherein said test means comprises: the testing device comprises an electric appliance control cabinet and an audio/radio frequency isolation box, wherein the electric appliance control cabinet is arranged above the supporting plate, and the audio/radio frequency isolation box is arranged outside the testing device.

5. The integrated test system for active noise reduction and ENC conversation noise reduction of clamshell ANC according to claim 1, wherein said speaker bracket comprises four threaded posts, said threaded posts being supported on said support plate, said speaker bracket being capable of adjusting the height of said speaker through said threaded posts.

6. The integrated test system for shell-ANC active noise reduction and ENC talk noise reduction of claim 4, wherein the audio/radio frequency isolation box comprises: the isolation box cover is connected to the isolation box body through a hydraulic cylinder mechanism in a turnover mode.

7. The integrated test system for active noise reduction and ENC call noise reduction of shell ANC of claim 6, wherein a grating sensor is further disposed on the isolation box body, and the grating sensor is used for detecting whether the isolation box cover is closed in place.

8. The integrated test system for active noise reduction and ENC call noise reduction of a clamshell ANC according to claim 6, wherein said test fixture comprises a fixture plate, a supporting pillar and a clamping arm, said fixture plate is fixedly connected to said supporting plate, said supporting pillar is vertically connected to said fixture plate, said clamping arm is horizontally disposed and vertically adjustable connected to said supporting pillar, and said artificial ear is clamped to said clamping arm.

9. The integrated test system for shell ANC active noise reduction and ENC talk noise reduction as claimed in claim 8, wherein the lower end of the supporting column is rotatably connected to the jig plate, the supporting column is provided with a vertically movable slot, one end of the clamping arm passes through the movable slot and can move up and down in the movable slot, the other end of the clamping arm is provided with a circular slot, and the artificial ear is sleeved in the circular slot for clamping.

10. The integrated test system for active noise reduction and ENC call noise reduction in clamshell ANC of claim 8, wherein said number of said struts, gripping arms and artificial ears is two, and said artificial mouth is disposed between said two artificial ears.