A bone conduction headphone detection device

Abstract

A bone conduction headphone testing device includes a housing supported by a damping spring on a rigid balanced base. A testing plate is supported on the housing by a buffer spring. A vibration sensor is located at the bottom of the testing plate, and a detection contact point is located on its top surface. The vibration sensor is electrically connected to a signal interface. A first bracket is fixed to the rigid balanced base, and a second bracket is rotatably hinged to the first bracket. An elastic band is mounted on the second bracket; rotating the second bracket allows the elastic band to contact the detection contact point. A tension column is also fixed to the rigid balanced base, and a tension spring is adjustable via an adjustment knob. The tension spring is connected to the second bracket. This testing device can reduce vibration signal errors, improve slow low-frequency response and low sensitivity, thereby increasing testing accuracy.

Description

Technical Field

[0001] This invention relates to the field of hearing device testing technology, and more particularly to a bone conduction headphone testing device. Background Technology

[0002] Currently, there are headphones that utilize bone conduction. Bone conduction is a sound transmission method that converts sound into mechanical vibrations of different frequencies, transmitting sound waves through the skull, bony labyrinth, inner ear fluid, cochlea, auditory nerve, and auditory center. Compared to the classic sound conduction method that generates sound waves through a diaphragm, bone conduction eliminates many steps in sound wave transmission, enabling clear sound reproduction even in noisy environments. Due to the unique sound conduction method of bone conduction headphones, they generally do not cause damage to the outer ear used to collect sound or to the auditory components such as the eardrum and ossicles, thus possessing significant technological advantages and promising development prospects.

[0003] To improve product performance, bone conduction headphones undergo performance testing before leaving the factory to ensure product quality. Currently, the testing method for bone conduction headphones typically uses vibration signal analysis. First, the vibration signal of the bone conduction headphone is collected. Then, the collected vibration signal is analyzed and processed. The analysis results are used to perform acoustic impedance calculations simulating a human face to obtain the frequency domain parameters of the bone conduction headphone under test. Finally, the test results of the bone conduction headphone are determined based on the frequency domain parameters.

[0004] However, in actual testing of bone conduction headphones, there is currently no corresponding device for collecting vibration signals, resulting in significant errors in the collected vibration signals, thus making it impossible to accurately test bone conduction headphones. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a bone conduction headphone detection device that can reduce vibration signal errors, improve slow low-frequency response and low sensitivity, thereby enhancing detection accuracy.

[0006] To achieve the above objectives, the present invention provides a bone conduction headphone detection device, comprising a rigid balance base, a housing supported by a damping spring on the rigid balance base, a detection plate supported by a buffer spring on the housing, a vibration sensor at the bottom of the detection plate, a detection contact point on the top surface of the detection plate above the vibration sensor, the vibration sensor being electrically connected to a signal interface, a first bracket fixed to the rigid balance base, a second bracket rotatably hinged to the first bracket, the second bracket being positioned above the detection plate, an elastic band positioned on the second bracket above the detection contact point, and the elastic band contacting the detection contact point by rotating the second bracket, and a tension column fixed to the rigid balance base, a tension spring adjustablely connected to the tension column via an adjustment knob, the tension spring being connected to the second bracket.

[0007] As a further improvement of the present invention, the detection plate is disc-shaped, and at least three buffer springs are provided, which are evenly distributed along the bottom edge of the detection plate.

[0008] As a further improvement of the present invention, the box body has a hollow cylindrical structure, and at least three vibration damping springs are provided, which are evenly distributed along the bottom edge of the box body.

[0009] As a further improvement of the present invention, the signal interface is disposed in the housing and also includes a signal adapter cable. The vibration sensor passes through the signal adapter cable into the housing and is electrically connected to the signal interface.

[0010] The beneficial effects of this invention are as follows: When performing testing using the detection device described in this invention, the bone conduction headphones are placed on the detection contact point. By adjusting the knob, the tension spring is adjusted so that the elastic band presses against the bone conduction headphones, which serves to fix them and simulate the wearing pressure of the headphones, thereby improving the detection accuracy. A vibration sensor is set below the detection contact point to collect the vibration signal of the bone conduction headphones. Moreover, the detection plate is supported by a buffer spring, which can improve the problem of slow low-frequency response and low sensitivity of the vibration sensor after it is fixed. At the same time, combined with the damping spring and the housing, the inertial vibration generated on the detection device when the headphones vibrate is reduced to a certain extent, thereby reducing vibration signal error and improving detection accuracy. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0012] Figure 2 This is a schematic diagram of the planar structure of the present invention;

[0013] Marking description: 1- Rigid balance base, 2- Vibration damping spring, 3- Box body, 4- Buffer spring, 5- Detection plate, 6- Vibration sensor, 7- Detection contact point, 8- Signal interface, 9- First bracket, 10- Second bracket, 11- Elastic band, 12- Tension column, 13- Adjustment knob, 14- Tension spring. Detailed Implementation

[0014] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0015] like Figure 1 , 2 As shown, a bone conduction headphone testing device includes a rigid balance base 1. A housing 3, hollow cylindrical in shape, is supported on the rigid balance base 1 by damping springs 2. Three damping springs 2 are evenly distributed along the bottom edge of the housing 3. A detection plate 5, disc-shaped, is supported on the housing 3 by buffer springs 4. Three buffer springs 4 are evenly distributed along the bottom edge of the detection plate 5. A vibration sensor 6 is located at the bottom center of the detection plate 5. A detection contact point 7 for placing the bone conduction headphone is located on the top surface of the detection plate 5, above the vibration sensor 6. A signal interface 8 is provided in the housing 3. The vibration sensor 6 is electrically connected to the signal interface 8 through a signal adapter cable. A first bracket 9 is also fixed on the rigid balance base 1. A second bracket 10 is rotatably hinged to the first bracket 9 and is positioned above the detection plate 5. An elastic band 11 is provided on the second bracket 10 above the detection contact point 7. By rotating the second bracket 10, the elastic band 11 can be brought into contact with the detection contact point 7. A tension column 12 is also fixed on the rigid balance base 1. A tension spring 14 is adjustablely connected to the tension column 12 via an adjustment knob 13. The tension spring 14 is connected to the second bracket 10. By adjusting the knob 13, the position of the tension spring 14 can be changed, causing the tension spring 14 to pull the second bracket 10, thereby adjusting the relative position between the elastic band 11 and the detection contact point 7.

[0016] When the aforementioned testing device performs testing, the bone conduction headphones are placed on the testing contact point 7. The tension spring 14 is adjusted by the knob 13, causing the elastic band 11 to press against the bone conduction headphones, thus fixing them and simulating the wearing pressure of the headphones to improve testing accuracy. Then, the vibration signal from the bone conduction headphones is collected by the vibration sensor 6 and output through the signal interface 8. Simultaneously, the testing plate 5 is supported by a buffer spring 4, which helps to mitigate the slow low-frequency response and low sensitivity issues of the vibration sensor 6 after it is fixed. Furthermore, combined with the damping spring 2 and the housing 3, the inertial vibration generated on the testing device during headphone vibration can be reduced to some extent, thereby reducing vibration signal errors and improving testing accuracy.

[0017] The above-described embodiments are merely illustrative of the present invention and are not intended to limit the present invention in any way. Any person skilled in the art who makes partial modifications or alterations to the technical content disclosed in the present invention without departing from the scope of the technical features of the present invention shall still fall within the scope of the technical features of the present invention.

Claims

1. A bone conduction headphone detection device, characterized in that: The utility model provides a vibration sensor, including hard balanced base, be provided with box on the hard balanced base through damping spring support, be provided with detection flat plate on the box through buffer spring support, the bottom of detection flat plate is provided with vibration sensor, the top surface of detection flat plate and be located the detection contact point above vibration sensor, vibration sensor electric connection has signal interface, still be fixed with first support on the hard balanced base, first support rotatable hinged has second support, second support sets up detection flat plate above, be provided with elastic rubber band on the second support above detection contact point, through rotating second support can make elastic rubber band with detection contact point contact, still be fixed with tension column on the hard balanced base, tension spring is adjustably connected with on the tension column through the position of adjusting knob, tension spring is connected with second support.

2. The bone conduction earphone detection device according to claim 1, characterized in that: The detection flat plate is discoid, the buffer spring is provided with at least three, the buffer spring is evenly distributed along the bottom edge of the detection flat plate.

3. The bone conduction earphone detection device according to claim 1, characterized in that: The box is hollow cylindrical structure, the damping spring is provided with at least three, the damping spring is evenly distributed along the bottom edge of the box.

4. The bone conduction earphone detection device according to claim 1, characterized in that: The signal interface is arranged in the box, further comprising a signal adapter wire, the vibration sensor is connected to the signal interface through the signal adapter wire.

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