Wind noise detection apparatus

Abstract

The utility model relates to electronic product performance test technical field provides a kind of wind noise detection device, comprising: sound attenuation box, wind noise box, test component and test host computer;Wind noise box and sound attenuation box intercommunication, to provide adjustable wind speed environment wind field in sound attenuation box;Test component includes the turntable and artificial person set in sound attenuation box, turntable and artificial person in environment wind field are connected, based on artificial person setting the electronic equipment to be measured, artificial person is used to emit standard test sound source in environment wind field, to supply electronic equipment to listen;Test host computer is configured to be connected with electronic equipment communication. The utility model can be more accurate to the wind noise suppression capability test of large quantities of electronic equipment, not only simple operation, and test cost is low.

Description

Technical Field

[0001] This utility model relates to the field of electronic product performance testing technology, and in particular to a wind noise detection device. Background Technology

[0002] With the development of technology, electronic devices such as TWS earphones, medical hearing aids, and smart translators are widely used in people's lives. These electronic devices are often used in outdoor scenarios, such as making calls and interacting with voice while walking outdoors. Wind noise has become the main factor affecting the clarity of voice when using electronic devices outdoors. In order to ensure product quality, it is urgent to evaluate the wind noise suppression capability of the microphones on electronic devices.

[0003] However, in practical applications, it has been found that the current testing of wind noise suppression capabilities of electronic devices mostly relies on manual listening or wind tunnel experiments. Manual listening tests are difficult to ensure accuracy, while wind tunnel tests are costly and prone to noise interference. Both of these testing methods are inconvenient to operate and not suitable for accurately testing large quantities of electronic devices. Utility Model Content

[0004] This invention provides a wind noise detection device to at least solve or improve the current problems of inconvenient testing operation and difficulty in accurately testing a large number of electronic devices for wind noise suppression capability detection of electronic devices.

[0005] This utility model provides a wind noise detection device, comprising: Silencer box; A wind noise box, which is connected to the silencer box, to provide an environmental wind field with adjustable wind speed within the silencer box; The test component includes a turntable and a mannequin set inside the anechoic chamber. The turntable is connected to the mannequin placed in the ambient wind field. An electronic device to be tested is set based on the mannequin. The mannequin is used to emit a standard test sound source in the ambient wind field for the electronic device to listen to. The test host is configured to communicate with the electronic device.

[0006] According to the wind noise detection device provided by this utility model, it further includes: An air supply duct, the first end of which is connected to the noise box, and the second end of which extends into the silencer box and toward the mannequin.

[0007] According to the wind noise detection device provided by this utility model, the second end of the air supply pipe is configured to extend toward the head of the simulated human; The electronic device includes headphones, which are worn on the head of the simulated human.

[0008] According to the wind noise detection device provided by this utility model, the portion of the air supply pipe extending toward the simulated human is configured to be retractable.

[0009] According to the wind noise detection device provided by this utility model, the turntable includes: A fixed platform is provided, which is connected to the bottom wall of the silencer box. A rotating platform, which is rotatably mounted on the fixed platform; A lifting component, the lower end of which is connected to the rotating platform, and the upper end of which is connected to the mannequin, the lifting component being used to adjust the set height of the mannequin.

[0010] According to the wind noise detection device provided by this utility model, the rotating platform is configured to rotate 360° relative to the fixed platform around a vertical axis, and the rotating platform is provided with circumferential angle scale lines.

[0011] According to the wind noise detection device provided by this utility model, the testing components further include: A vibration damping frame is installed on the bottom wall of the silencing box, and a fixing platform is installed on the vibration damping frame.

[0012] According to the wind noise detection device provided by this utility model, it further includes: The sound generation unit includes an audio acquisition card and a power amplifier. The test host is electrically connected to the audio acquisition card, the audio acquisition card is electrically connected to the power amplifier, and the power amplifier is electrically connected to the simulated human.

[0013] According to the wind noise detection device provided by this utility model, it further includes: A high-fidelity speaker is installed inside the anechoic chamber and is communicatively connected to the power amplifier; The high-fidelity speaker is used to provide simulated noise toward the mannequin.

[0014] According to the wind noise detection device provided by this utility model, multiple high-fidelity speakers are provided, and the multiple high-fidelity speakers are arranged around the simulated human.

[0015] According to the wind noise detection device provided by this utility model, the wall of the silencing box includes a sound-absorbing layer, a sound-insulating layer, a vibration-damping layer and an outer protective layer, wherein the sound-absorbing layer, the sound-insulating layer, the vibration-damping layer and the outer protective layer are arranged sequentially from the inside to the outside.

[0016] According to the present invention, a wind noise detection device is provided, wherein the sound-absorbing layer includes corrugated cotton. And / or, the sound insulation layer comprises at least one layer of medium-density fiberboard; And / or, the vibration damping layer includes a sound insulation pad and at least one damping layer, wherein the sound insulation pad and at least one damping layer are stacked.

[0017] According to the present invention, a wind noise detection device is provided, wherein the wind noise box includes a box body and a blower; The housing contains an air inlet duct, an air cavity, and an air outlet duct connected in sequence. The blower is located in the air cavity and is used to drive external airflow into the air cavity along the air inlet duct, and then drive the airflow through the air outlet duct to reach the air noise box. The inner walls of the air inlet duct, the air cavity, and the air outlet duct are all provided with sound-absorbing cotton.

[0018] The wind noise detection device provided by this utility model, by setting up a silencing box, a wind noise box, a test component, and a test host, allows the electronic device under test to be placed on a mannequin during the test. The wind noise box provides an adjustable wind field within the silencing box, and the mannequin emits a standard test sound source within this wind field. This ensures that the electronic device picks up the standard test sound source within the silencing box based on a simulated wind noise environment, reducing interference from other environmental factors. The test host facilitates comparison between the standard test sound source and the audio information received by the electronic device, allowing for a more accurate assessment of the wind noise suppression capability of the electronic device. This test structure facilitates the sequential testing of multiple electronic devices, ensuring testing efficiency.

[0019] As can be seen from the above, the wind noise detection device described in this embodiment can accurately test the wind noise suppression capability of a large number of electronic devices. It is not only simple to operate and convenient to test, but also has low testing cost. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the wind noise detection device provided by this utility model.

[0022] Figure 2 This is a schematic diagram of the structure provided by this utility model, showing the air supply duct and the simulated human figure inside the silencer box arranged relative to each other.

[0023] Figure 3 This is a schematic diagram of the structure of the test component provided by this utility model.

[0024] Figure 4 This is a cross-sectional structural diagram of the wind noise box provided by this utility model.

[0025] Figure 5 This is a cross-sectional structural diagram of the wall of the silencer box provided by this utility model.

[0026] Figure 6 This is a block diagram of the control structure of the wind noise detection device provided by this utility model.

[0027] Figure label: 1. Silencer box; 11. Sound-absorbing layer; 12. Sound insulation layer; 13. Vibration-damping layer; 14. Outer protective layer; 2. Noise level box; 21. Box housing; 22. Blower; 201. Air inlet duct; 202. Air cavity; 203. Air outlet duct; 211. Sound-absorbing cotton; 3. Test components; 31. Turntable; 311. Fixed platform; 312. Rotating platform; 3120. Angle scale lines; 313. Lifting components; 32. Simulated man; 33. Vibration damping frame; 4. Air supply duct; 5. High-fidelity speaker; 6. Sound generation unit; 7. Test host. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0029] The following is combined Figures 1-6 The wind noise detection device provided in this utility model will be described in detail through specific embodiments and application scenarios.

[0030] like Figure 1 and Figure 2 As shown, this utility model embodiment provides a wind noise detection device, including: a silencer box 1, a wind noise box 2, a test component 3, and a test host 7; The wind noise chamber 2 and the anechoic chamber 1 are connected to provide an environmental wind field with adjustable wind speed within the anechoic chamber 1. The test component 3 includes a turntable 31 and a mannequin 32 disposed within the anechoic chamber 1. The turntable 31 is connected to the mannequin 32 placed in the environmental wind field. The electronic device under test is set based on the mannequin 32. The mannequin 32 is used to emit a standard test sound source in the environmental wind field for the electronic device to listen to. The test host 7 is configured to communicate with the electronic device and is used to evaluate the wind noise suppression capability of the electronic device based on the standard test sound source and the audio information received by the electronic device.

[0031] It is understood that the electronic device under test in this embodiment can be a TWS earphone, a medical hearing aid, a smart translator, etc. The electronic device can be mounted on the mannequin 32 or placed on one side of the mannequin 32; there is no specific limitation in this regard. The electronic device has a microphone or microphone array for sound pickup.

[0032] The noise chamber 2 and the silencer chamber 1 are two independent enclosures 21. The noise chamber 2 is equipped with a blower, allowing it to connect to the silencer chamber 1 via ducts or an air conditioning system. The noise chamber 2 supplies a stable airflow to the silencer chamber 1, creating an environmental airflow field within the silencer chamber 1 for testing electronic equipment. The silencer chamber 1 provides a low-noise, free-field environment for evaluating the noise suppression capabilities of electronic equipment, mitigating the noise impact of the noise chamber 2 on the testing of the electronic equipment.

[0033] The test host 7 can be a laptop or industrial computer known in the art. The test host 7 is wirelessly connected to the electronic device under test, for example, via Bluetooth or WiFi. The test host 7 can also be configured to communicate with the wind noise box 2 to control the wind noise box 2 to output wind at different speeds.

[0034] In practical applications, the volume of the silencer box 1 is much larger than that of the wind noise box 2. The air supplied by the wind noise box 2 into the silencer box 1 in a short period of time will not have a significant impact on the air pressure inside the silencer box 1, thus ensuring the effectiveness of testing the wind noise suppression capability of electronic equipment inside the silencer box 1.

[0035] During the test, a mannequin 32 replaces a real person to conduct the simulation test. The mannequin 32 is controlled to rotate in the environmental wind field by a turntable 31. The orientation of the mannequin 32 relative to the wind direction of the environmental wind field can be adjusted to simulate different natural wind conditions.

[0036] Meanwhile, the mannequin 32 emits a standard test sound source in the environmental wind field based on its artificial mouth, ensuring that the sound heard by the microphone of the electronic device is actually a standard test sound source loaded with noise based on the environmental wind field. The microphone of the electronic device will use its sound pickup and noise reduction functions to process the sound emitted by the mannequin 32 in the environmental wind field to obtain audio information. The test host 7 compares the standard test sound source with the audio information heard by the electronic device to evaluate the wind noise suppression capability of the electronic device.

[0037] The wind noise detection device shown in this utility model, by setting up a silencing box 1, a wind noise box 2, a test component 3, and a test host 7, allows the electronic device under test to be placed on a mannequin 32 during the test. The wind noise box 2 provides an adjustable wind speed environment within the silencing box 1, and the mannequin 32 emits a standard test sound source within the environmental wind field. This ensures that the electronic device picks up the standard test sound source within the silencing box 1 based on the simulated wind noise environment, reducing interference from other environmental factors. The test host 7 facilitates the comparison between the standard test sound source and the audio information heard by the electronic device, allowing for a more accurate assessment of the wind noise suppression capability of the electronic device. This test structure facilitates the sequential testing of wind noise suppression for multiple electronic devices, ensuring test efficiency.

[0038] As can be seen from the above, the wind noise detection device described in this embodiment can accurately test the wind noise suppression capability of a large number of electronic devices. It is not only simple to operate and convenient to test, but also has low testing cost.

[0039] In some embodiments, such as Figure 1 and Figure 2 As shown, the wind noise detection device also includes: an air supply pipe 4, the first end of which is connected to the wind noise box 2, and the second end of which extends into the silencer box 1 and toward the mannequin 32; wherein, electronic equipment is installed on the mannequin 32.

[0040] Understandably, the silencer box 1 has a silencer cavity and a connecting hole communicating with the silencer cavity, and the connecting hole is located on the side wall of the silencer box 1. The middle part of the air supply pipe 4 passes through the connecting hole, and the peripheral wall of the air supply pipe 4 is sealed to the wall of the connecting hole.

[0041] Since the second end of the air supply duct 4 extends into the silencer box 1 and towards the mannequin 32, considering that the silencer box 1 has the characteristic of shielding external noise, it can ensure that only the environmental wind field formed by the wind noise box 2 through the air supply duct 4 is applied to the mannequin 32, eliminating the introduction of other external noises that affect the sound field environment where the mannequin 32 is located, which is conducive to ensuring the accuracy of the wind noise test results.

[0042] In some embodiments, such as Figure 2As shown, the part of the air supply pipe 4 extending towards the mannequin 32 can be configured to be retractable. For example, the part of the air supply pipe 4 extending towards the mannequin 32 can be a telescopic pipe. This design makes it easy to adjust the distance between the second end of the air supply pipe 4 and the mannequin 32 according to actual needs, thereby adjusting the wind force intensity of the environmental wind field acting on the mannequin 32 and achieving the purpose of flexibly adjusting the test scene.

[0043] In some embodiments, the air supply duct 4 can be configured as a flexible hose, such as an aluminum foil telescopic tube. Based on the configuration of the flexible hose, it is convenient to flexibly arrange the silencer box 1 and the wind noise box 2 according to the actual needs of the scenario.

[0044] In some embodiments, such as Figure 2 As shown, the second end of the air supply duct 4 is configured to extend toward the head of the mannequin 32; wherein, the electronic device includes headphones, which are worn on the head of the mannequin 32.

[0045] It is understandable that when the electronic device is an earphone, by wearing the earphone on the head of the mannequin 32, the test scenario of a real person wearing an earphone can be simulated. By setting the second end of the air supply pipe 4 to extend to the head of the mannequin 32, the environmental wind field provided by the air supply pipe 4 can directly act on the head of the mannequin 32. At this time, the environmental wind field covers the artificial mouth of the mannequin 32 and the earphone to be tested.

[0046] Therefore, when testing the wind noise suppression capability of headphones, it can be ensured that the simulated human 32 emits a standard test sound source based on an artificial mouth in an environmental wind field, and the standard test sound source loaded with environmental wind field noise can be heard by the headphones.

[0047] In some embodiments, such as Figure 2 and Figure 3 As shown, the turntable 31 includes: a fixed platform 311, a rotating platform 312, and a lifting component 313; the fixed platform 311 is connected to the bottom wall of the silencer box 1, the rotating platform 312 is rotatably mounted on the fixed platform 311, the lower end of the lifting component 313 is connected to the rotating platform 312, and the upper end of the lifting component 313 is connected to the mannequin 32. The lifting component 313 is used to adjust the setting height of the mannequin 32.

[0048] It is understood that a rotating support is provided between the fixed stage 311 and the rotating stage 312. For example, the rotating support includes a planar support bearing arranged along the axial direction and a ball bearing arranged along the radial direction. The tester can manually adjust the rotation of the rotating stage 312 relative to the fixed stage 311 to adjust the angle of the orientation of the simulated person 32 relative to the wind direction of the environmental wind field in order to complete the relevant test work.

[0049] Of course, a drive assembly can also be provided between the fixed stage 311 and the rotating stage 312. The drive assembly includes a drive motor and a gear transmission mechanism. The drive motor can be mounted on the fixed stage 311 and drive the rotating stage 312 to rotate relative to the fixed stage 311 through the gear transmission mechanism. In this case, the tester can control the drive motor to rotate to the target angle through an interactive device (such as a tablet computer), so that the drive motor and the gear transmission mechanism drive the rotating stage 312 to rotate relative to the fixed stage 311 to the target position in order to complete the relevant test work.

[0050] Furthermore, the lifting component 313 can be a telescopic rod. In practical applications, the telescopic rod can be set vertically on the central axis of the rotating platform 312. While the rotating platform 312 drives the mannequin 32 to rotate around the vertical axis, the lifting component 313 can also be used to adjust the height of the mannequin 32 relative to the second end (air outlet) of the air supply pipe 4. Based on the different height positions of the mannequin 32 in the environmental wind field, the wind noise suppression capability of electronic equipment can be tested.

[0051] In some embodiments, such as Figure 3 As shown, the rotating platform 312 is configured to rotate 360° relative to the fixed platform 311 about a vertical axis. The rotating platform 312 is provided with circumferential angle scale lines 3120. This design allows the rotation angle of the rotating platform 312 relative to the fixed platform 311 to be read intuitively based on the angle scale lines 3120 during the 360° rotation of the rotating platform 312 relative to the fixed platform 311.

[0052] The fixed stage 311 can be equipped with a reference mark, which is aligned with the 0° mark on the angle scale 3120 when the rotating stage 312 is in its initial position. Based on the angle indicated by the reference mark, the actual rotation angle of the rotating stage 312 relative to the fixed stage 311 can be determined.

[0053] In some embodiments, such as Figure 1 and Figure 2 As shown, the test assembly 3 also includes: a vibration damping frame 33, which is disposed on the bottom wall of the silencing box 1, and a fixing platform 311 is disposed on the vibration damping frame 33.

[0054] Understandably, by setting up the vibration damping frame 33, the installation of the fixed platform 311 is achieved, and the mechanical vibration of the external environment can be eliminated to a certain extent from being transmitted to the fixed platform 311 through the wall of the silencing box 1, thus ensuring the stability of the simulated human 32 in the environmental wind field.

[0055] For example, the vibration damping frame 33 may be provided with an elastic connecting seat and a support frame, the support frame being connected to the bottom wall of the silencing box 1 through the elastic connecting seat, and the fixed platform 311 being disposed on the support frame.

[0056] In some embodiments, such as Figure 6 As shown, the wind noise detection device also includes: a sound generation unit 6, which includes an audio acquisition card and a power amplifier; the test host 7 is electrically connected to the audio acquisition card; the audio acquisition card is electrically connected to the power amplifier; and the power amplifier is electrically connected to the mannequin 32.

[0057] Understandably, the audio acquisition card can generate multiple audio signals under the control of the test host 7. One of the audio signals generated by the audio acquisition card is transmitted to the mannequin 32 after being amplified by the power amplifier, for example, to the artificial mouth of the mannequin 32. The standard test sound source shown in the above embodiment is output by the artificial mouth of the mannequin 32.

[0058] In some embodiments, such as Figure 1 and Figure 6 As shown, the wind noise detection device also includes: a high-fidelity speaker 5, which is installed inside the anechoic chamber 1 and electrically connected to the power amplifier; wherein, the high-fidelity speaker 5 is used to provide simulated noise toward the mannequin 32.

[0059] Understandably, the fidelity speaker 5 usually refers to a high-fidelity speaker 5 (HiFi speaker), used to simulate noise reproduction. Another audio signal generated by the audio acquisition card is amplified by a power amplifier and then transmitted to the fidelity speaker 5, which provides simulated noise towards the human simulator 32.

[0060] In practical applications, while the mannequin 32 emits a standard test sound source into the environmental wind field, the fidelity speaker 5 can also be controlled to provide highly realistic simulated noise towards the mannequin 32. At this time, electronic devices are used to collect sound in this environment, and the test host 7 evaluates the wind noise suppression capability of the electronic devices based on the audio information heard by the electronic devices.

[0061] In some embodiments, such as Figure 1 As shown, to ensure the accuracy of the test results, multiple fidelity speakers 5 can be set up, with the multiple fidelity speakers 5 arranged around the mannequin 32. For example, four fidelity speakers 5 can be set up, with the four fidelity speakers 5 positioned at the four corners of the anechoic chamber 1.

[0062] In some embodiments, such as Figure 5 As shown, in order to ensure the sound absorption effect of the silencer box 1, the box wall of the silencer box 1 includes a sound-absorbing layer 11, a sound-insulating layer 12, a vibration-damping layer 13 and an outer protective layer 14, which are arranged sequentially from the inside to the outside.

[0063] Specifically, the sound-absorbing layer 11 includes corrugated cotton, which mainly converts sound energy into heat or disperses and reflects it based on the synergistic effect of "porous energy absorption + waveform scattering + elastic energy dissipation" to achieve the purpose of sound absorption.

[0064] For example, the corrugated cotton can be glass fiber corrugated cotton. Corrugated cotton is usually a porous structure. Its main structure consists of a base and multiple corrugated parts disposed on the inner side of the base. The thickness of the base is approximately 10 mm, and the thickness of the corrugated parts is approximately 120 mm.

[0065] For example, the sound insulation layer 12 includes at least one layer of medium-density fiberboard (MDF), which has good sound insulation properties, and the thickness of each MDF layer is approximately 10 mm.

[0066] Exemplarily, the vibration damping layer 13 primarily provides damping and buffering for mechanical vibrations from the outer sheath 14, preventing the transmission of mechanical vibrations to the sound insulation layer 12. The vibration damping layer 13 includes a sound insulation pad and at least one damping layer, which are stacked together. The damping layer can be a wool felt layer with a thickness of approximately 2 mm, and the sound insulation pad can be foam with a thickness of approximately 3 mm.

[0067] For example, the outer protective layer 14 mainly serves a physical protection function, and the outer protective layer 14 can be made of stainless steel and aluminum shell.

[0068] In some embodiments, such as Figure 4 As shown, the wind noise box 2 includes a box body 21 and a blower 22; the box body 21 can be made of multi-layer high-density board, and the blower 22 can be configured to be electrically connected to the test host 7, and the blower speed of the blower 22 is controlled by the test host 7; wherein, the blower 22 can be a centrifugal fan.

[0069] like Figure 4 As shown, the housing 21 has an air inlet duct 201, an air cavity 202, and an air outlet duct 203 connected in sequence. A blower 22 is installed in the air cavity 202. The blower 22 is used to drive the external airflow into the air cavity 202 along the air inlet duct 201, and then drive the airflow through the air outlet duct 203 to reach the noise box 2. The inner walls of the air inlet duct 201, the air cavity 202, and the air outlet duct 203 are all provided with sound-absorbing cotton 211. The sound absorption function of the sound-absorbing cotton 211 can be used to eliminate the noise introduced by the noise box 2 during the air supply process as much as possible.

[0070] Based on the solutions shown in the above embodiments, in practical applications, according to common knowledge in the field, when the test host performs data processing, the wind noise suppression capability of the electronic device can be further quantitatively evaluated based on the WNR index and STI index. The WNR index represents the impact of wind noise suppression effect on loudness loss and noise, while the STI index represents the impact of wind noise suppression effect on call clarity.

[0071] (a) The WNR index can be obtained in the manner shown in the following example, and the specific steps are as follows: (1) Calibrate the sound field of the simulated human to the set value, for example, the set value is 94dB.

[0072] (2) Set the wind speed of the wind noise box to the silencer box to 3 mph, 6 mph, 9 mph and 12 mph respectively.

[0073] (3) Calculate loudness loss LR : ; In the above formula, m This represents a constant, for example, a constant of 0.2. S i Indicates the electroacoustic path at frequency S i Sensitivity at that location W i Indicates weighting coefficients (different) LR corresponding W i (Different values).

[0074] (4) Calculate the noise power under wind conditions: ; In the above formula, B represents the spectrum analysis bandwidth value, and Y... i This indicates the sensitivity values ​​for each frequency.

[0075] (5) Calculate the WNR index: WNR index = 100 + SLR (风) +NOISE （风） ; (6) Calculate the WNR index at different angles based on the rotation angle of the simulated human.

[0076] (ii) The STI index can be obtained using the method shown in the following example, specifically referring to the following steps: (1) Calibrate the sound field of the simulated human to a set value, such as 94dB or any value between 100Hz and 10kHz.

[0077] (2) Set the wind speed of the wind noise box to the silencer box to 3 mph, 6 mph, 9 mph and 12 mph respectively.

[0078] (3) Set the simulated human to emit a standard test sound source in an environmental wind field as a noise carrier with sinusoidal intensity modulation and a defined initial modulation index m. iThe modulation frequencies are 0.63Hz, 0.8Hz, 1.0Hz, 1.25Hz, 1.6Hz, 2.0Hz, 2.5Hz, 3.15Hz, 4.0Hz, 5.0Hz, 6.3Hz, 8.0Hz, 10.0Hz and 12.5Hz, modulated in 7 octave bands (125Hz, 250Hz, 500Hz, 1kHz, 2kHz, 4kHz and 8kHz).

[0079] (4) After the electronic device hears the sound emitted by the simulated person in the environmental wind field (noise carrier), the audio information obtained by the electronic device under test is connected to an octave filter with a center frequency of 125Hz, 250Hz, 500Hz, 1kHz, 2kHz, 4kHz and 8kHz, and the modulation index m0 is obtained from the filtered signal.

[0080] (5) Based on the following formula, the modulation index m0 and the initial modulation index m are obtained. i The ratio: m(F) = m0 / m i [m(F)≤1].

[0081] (6) Convert each of the m(F) values ​​according to the following formula: X = 10lg[m(F) / (1-m(F))].

[0082] (7) Values ​​higher than +15dB are taken as +15dB, and values ​​lower than -15dB are taken as -15dB. The STI index (Y) from 0 to 1 is normalized according to the following equation: Y = (X + 15) / 30.

[0083] (8) Calculate the STI index at different angles based on the rotation angle of the simulated human.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A wind noise detection device, characterized in that, include: Silencer box; A wind noise box, which is connected to the silencer box, to provide an environmental wind field with adjustable wind speed within the silencer box; The test component includes a turntable and a mannequin set inside the anechoic chamber. The turntable is connected to the mannequin placed in the ambient wind field. An electronic device to be tested is set based on the mannequin. The mannequin is used to emit a standard test sound source in the ambient wind field for the electronic device to listen to. The test host is configured to communicate with the electronic device.

2. The wind noise detection device according to claim 1, characterized in that, Also includes: An air supply duct, the first end of which is connected to the noise box, and the second end of which extends into the silencer box and toward the mannequin.

3. The wind noise detection device according to claim 2, characterized in that, The second end of the air supply duct is configured to extend toward the head of the simulated human; The electronic device includes headphones, which are worn on the head of the simulated human.

4. The wind noise detection device according to claim 2, characterized in that, The portion of the air duct extending toward the mannequin is configured to be retractable.

5. The wind noise detection device according to claim 1, characterized in that, The turntable includes: A fixed platform is provided, which is connected to the bottom wall of the silencer box. A rotating platform, which is rotatably mounted on the fixed platform; A lifting component, the lower end of which is connected to the rotating platform, and the upper end of which is connected to the mannequin, the lifting component being used to adjust the set height of the mannequin.

6. The wind noise detection device according to claim 5, characterized in that, The rotating platform is configured to rotate 360° relative to the fixed platform about a vertical axis, and the rotating platform is provided with circumferential angle scale lines.

7. The wind noise detection device according to claim 5, characterized in that, The testing components also include: A vibration damping frame is installed on the bottom wall of the silencing box, and a fixing platform is installed on the vibration damping frame.

8. The wind noise detection device according to any one of claims 1 to 7, characterized in that, Also includes: The sound generation unit includes an audio acquisition card and a power amplifier. The test host is electrically connected to the audio acquisition card, the audio acquisition card is electrically connected to the power amplifier, and the power amplifier is electrically connected to the simulated human.

9. The wind noise detection device according to claim 8, characterized in that, Also includes: A high-fidelity speaker is installed inside the anechoic chamber and is electrically connected to the power amplifier; The high-fidelity speaker is used to provide simulated noise toward the mannequin.

10. The wind noise detection device according to claim 9, characterized in that, The high-fidelity speakers are provided in multiple units, and the multiple high-fidelity speakers are arranged around the mannequin.

11. The wind noise detection device according to any one of claims 1 to 7, characterized in that, The wall of the anechoic chamber includes a sound-absorbing layer, a sound-insulating layer, a vibration-damping layer, and an outer protective layer, which are arranged sequentially from the inside to the outside.

12. The wind noise detection device according to claim 11, characterized in that, The sound-absorbing layer includes corrugated cotton; And / or, the sound insulation layer comprises at least one layer of medium-density fiberboard; And / or, the vibration damping layer includes a sound insulation pad and at least one damping layer, wherein the sound insulation pad and at least one damping layer are stacked.

13. The wind noise detection device according to any one of claims 1 to 7, characterized in that, The noise box includes a housing and a blower; The housing contains an air inlet duct, an air cavity, and an air outlet duct connected in sequence. The blower is located in the air cavity and is used to drive external airflow into the air cavity along the air inlet duct, and then drive the airflow through the air outlet duct to reach the air noise box. The inner walls of the air inlet duct, the air cavity, and the air outlet duct are all provided with sound-absorbing cotton.

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