Test method

Abstract

The invention belongs to the technical field of audio testing, and particularly relates to a testing method, which is used for detecting the sound insulation effect of a protective ear appliance, and comprises the following steps: a connection step: connecting a sound pickup device with the protective ear appliance, the protective ear appliance being worn on the ear and blocking the ear canal, the sound pickup device comprising a first microphone and a second microphone, the second microphone is communicated with the ear canal; a signal release step of releasing sound signals to the first microphone and the second microphone by detecting a sound source; a measurement step: measuring the sound pressure level of the sound signal outside the ear canal through the first microphone, generating a first signal to be measured, measuring the sound pressure level of the sound signal in the ear canal through the second microphone, and generating a second signal to be measured; and a detection step: detecting the first to-be-detected signal and the second to-be-detected signal through a test structure. According to the invention, the test accuracy and applicability of the test method can be improved.

Description

Technical Field

[0001] The invention belongs to the technical field of audio testing, and in particular relates to a testing method. Background Art

[0002] In industrial and high-noise environments, companies or individuals invest in binaural noise protection earplugs or earmuffs to protect employees' hearing. However, due to the uneven quality of protective eargear or employees' failure to choose the right type of protective eargear, the protective effect of protective eargear is limited, resulting in frequent noise-induced hearing damage. Workers who are exposed to an equivalent sound pressure level of 85dB(A) or above for a long time for 8 hours may face the risk of hearing loss. This loss not only brings many inconveniences to communication, but the most obvious impact is that it hinders language communication and may eventually lead to noise-induced hearing loss. Therefore, when choosing protective eargear, it is necessary to test the noise isolation effect of the protective eargear.

[0003] At present, when testing the sound insulation performance of protective earwear, the protective earwear is usually placed on a special test device for testing. However, due to the differences in each person's ear canal structure and hearing conditions, even if the protective earwear passes the test on the test device, it may not play a sound insulation role when actually worn because it is not suitable for the user. Therefore, the test results of the protective earwear by the existing test methods cannot truly reflect the use effect of the protective earwear. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a testing method, aiming to solve the problem of how to improve the accuracy and applicability of the testing method.

[0005] To achieve the above purpose, the technical solution adopted in this application is:

[0006] In a first aspect, a testing method is provided for detecting the sound insulation effect of protective earwear, characterized in that the method comprises the following steps:

[0007] Connecting step: connecting the sound pickup device to the protective eargear, wherein the protective eargear is worn on the ear and blocks the ear canal, and the sound pickup device includes a first microphone and a second microphone, and the second microphone is connected to the ear canal;

[0008] Signal releasing step: releasing sound signals to the first microphone and the second microphone by detecting a sound source;

[0009] Measuring step: measuring the sound pressure level of the sound signal outside the ear canal by the first microphone and generating a first signal to be measured, and measuring the sound pressure level of the sound signal inside the ear canal by the second microphone and generating a second signal to be measured;

[0010] Detection step: Detecting the first signal to be tested and the second signal to be tested by a test structure.

[0011] In some embodiments, the sound pickup device is disposed outside the ear canal;

[0012] In the connecting step, the second microphone is connected to the protective eargear via a probe tube, one end of the probe tube extends into the ear canal, and the other end of the probe tube is connected to the second microphone, and the probe tube is used to transmit the sound in the ear canal to the second microphone.

[0013] In some embodiments, the signal release step comprises:

[0014] A plurality of the sound signals are released to the first microphone and the second microphone through the detection sound source, and the frequencies of the sound signals are different.

[0015] In some embodiments, the number of the protective earpieces is set to two, and the two protective earpieces are respectively worn on the two ears of the tester, and the connecting step includes:

[0016] The two sound pickup devices are connected to the two protective earpieces respectively.

[0017] In some embodiments, the detecting step comprises:

[0018] The test structure obtains a personal sound attenuation value according to the first signal to be tested and the second signal to be tested, and determines the sound insulation effect of the protective earwear according to the personal sound attenuation value.

[0019] In some embodiments, the connecting step further comprises:

[0020] Calibration step: performing a calibration test on the sound pickup device.

[0021] In some embodiments, the calibration step comprises:

[0022] Signal sending step: releasing test audio to the sound pickup device through the detection sound source;

[0023] Receiving step: the sound pickup device receives the test audio and generates a third signal to be tested;

[0024] Determination step: the test structure detects the third signal to be tested, and determines whether the performance parameters of the sound pickup device are consistent with the factory specification parameters.

[0025] In some embodiments, the detection sound source includes a detection host, and the detection host is provided with a sound outlet for emitting the sound signal;

[0026] Before the signal sending step, the sound pickup device is connected to the detection host so that the sound pickup device is directly opposite to the sound outlet.

[0027] In some embodiments, the step of connecting and the step of releasing the signal further includes:

[0028] Adjustment step: adjust the detection host to a preset height so that the sound outlet is on the same horizontal line with the nose tip of the tester.

[0029] In some embodiments, the connecting step comprises:

[0030] The test glasses are worn on the ears, the sound pickup device is clamped and fixed on the test glasses by a mounting clip, and the sound pickup device is connected to the protective eargear.

[0031] The testing method provided in the present application can detect the sound insulation effect of the protective eargear only by connecting the sound pickup device to the protective eargear. Therefore, the testing can be performed when the protective eargear is worn on the ear. The sound insulation effect of the protective eargear can be tested more realistically, and the influence of individual differences on the accuracy of the test results can be effectively reduced, thereby improving the accuracy and applicability of the test and ensuring that the user can choose and wear the most suitable protective eargear. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or exemplary technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 It is a flow chart of a testing method provided in one of the embodiments of the present application;

[0034] Figure 2 It is a schematic diagram of the overall structure of the test method provided in the embodiment of the present application;

[0035] Figure 3 It is a schematic diagram of the testing process of the testing method provided in the embodiment of the present application;

[0036] Figure 4 is a structural schematic diagram of a testing method provided by another embodiment of the present application;

[0037] Figure 5 yes Figure 4 A schematic diagram of the enlarged structure of part A;

[0038] Figure 6It is a flowchart of a testing method provided in another embodiment of the present application.

[0039] Among them, the reference numerals in the figure are:

[0040] 10. Detect sound source; 11. Detect host; 111. First connection part; 12. Base; 13. Height adjustment rod; 131. Screw structure; 20. Sound pickup device; 21. First microphone; 22. Second microphone; 23. Package shell; 24. Second connection part; 30. Probe; 40. Cable; 50. Audio connector; 61. Eyeglass frame; 62. Mounting clip; 200. Protective earwear. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0043] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0044] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0045] See also Figures 1 to 6 The embodiment of the present application provides a testing method for detecting the sound insulation effect of the protective earwear 200. The testing method comprises the following steps:

[0046] Connecting step S10: connecting the sound pickup device 20 to the protective earwear 200, wherein the protective earwear 200 is worn on the ear and blocks the ear canal, and the sound pickup device 20 includes a first microphone 21 and a second microphone 22, and the second microphone 22 is connected to the ear canal.

[0047] It should be noted that the protective earwear 200 of the embodiment of the present application can be an earmuff or an earplug, etc. It is understandable that when the protective earwear 200 is worn on the ear, the ear canal is blocked, thereby isolating the outside of the ear canal from the inside of the ear canal. It is understandable that the test method of the embodiment of the present application can be compatible with the hearing protection effect verification of multiple brands and models of protective equipment (including earplugs, earmuffs, closed helmets, etc.).

[0048] Signal releasing step S20 : ​​releasing a sound signal to the first microphone 21 and the second microphone 22 by detecting the sound source 10 .

[0049] Measuring step S30: measuring the sound pressure level of the sound signal outside the ear canal by the first microphone 21 and generating a first signal to be measured, and measuring the sound pressure level of the sound signal inside the ear canal by the second microphone 22 and generating a second signal to be measured.

[0050] It should be noted that sound pressure level is a logarithmic scale that describes the intensity of sound, usually in decibels (dB). The sound pressure level is calculated by taking the common logarithm of the ratio of the measured sound pressure to the reference sound pressure and multiplying it by 20. The sound pressure range that the human ear can hear corresponds to a sound pressure level range of 0dB to 120dB.

[0051] Detection step S40: Detecting the first signal to be tested and the second signal to be tested by the test structure.

[0052] The test structure has the function of analyzing the first test signal and the second test signal generated after the first microphone 21 and the second microphone 22 receive the sound signal, and according to the preset data processing logic, the sound insulation effect test result of the protective earwear 200 can be obtained. The test structure can be any available electronic device with computing power, such as any type of audio analysis instrument and computer.

[0053] After the test is completed, the system will provide a "pass" or "fail" result; a "pass" result indicates that the hearing protector can provide adequate protection based on the employee's noise exposure; a "fail" result indicates that the hearing protector is not worn correctly, or that the protective earwear 200 is not suitable for the size or shape of the employee's ear canal, and the employee does not get adequate protection. Understandably, one protective earwear 200 is not suitable for everyone, as everyone's ear canal is different and the usage environment is also different. Measuring the personal sound attenuation value of each user can make the test results more accurate and provide each user with a more suitable protective earwear 200.

[0054] The testing method provided in the present application can detect the sound insulation effect of the protective earmuffs 200 only by connecting the sound pickup device 20 to the protective earmuffs 200. Therefore, the testing can be performed when the protective earmuffs 200 are worn on the ears. The sound insulation effect of the protective earmuffs 200 can be detected more realistically, and the influence of individual differences on the accuracy of the test results can be effectively reduced, thereby improving the accuracy and applicability of the test and ensuring that the user can choose and wear the most suitable protective earmuffs 200.

[0055] In addition, the present application can conduct testing by simply connecting the sound pickup device 20 to the protective earwear 200, which is convenient and easy to operate; and the test equipment is small in size, light in weight, easy to disassemble and install, and can be stored in a portable suitcase for easy transfer.

[0056] It can be understood that the sound pickup device 20 and the protective earmuff 200 are detachably connected, so as to facilitate the connection and separation of the sound pickup device 20 and the protective earmuff 200, so that the sound pickup device 20 can be connected to multiple protective earmuffs 200 respectively, so as to test the sound insulation effect of multiple protective earmuffs 200.

[0057] In some embodiments, the first microphone 21 and the second microphone 22 are both arranged outside the ear canal. In the connection step S10, the second microphone 22 can be connected to the protective eargear 200 through the probe 30. One end of the probe 30 extends into the ear canal, and the other end of the probe 30 is connected to the second microphone 22. The probe 30 is used to transmit the sound in the ear canal to the second microphone 22.

[0058] In the embodiment of the present application, the probe 30 is connected to the second microphone 22, and the environment in which the second microphone 22 is located is a pressure field environment, while the environment in which the first microphone 21 is located is a free field environment. It should be noted that the pressure field refers to the situation where the wavelength of the sound wave is larger than the place where the sound is located, that is, when the wavelength of the sound wave is larger than the size of the space in which it is located, the sound pressure distribution in the space is relatively uniform, and there is no obvious standing wave or reflection effect. This environment is called a pressure field. In the pressure field, the sound pressure is evenly distributed, and there is almost no obvious standing wave or sound wave propagation direction. The free field refers to the situation where the wavelength of the sound wave is smaller than the place where the sound is located, that is, when the wavelength of the sound wave is smaller than the size of the space in which it is located, the sound wave propagation is not affected by the boundary and can propagate freely in the space. This environment is called a free field.

[0059] It can be understood that the probe tube 30 is equivalent to an extension of the second microphone 22, and the two are combined to form an integral unit, so that the second microphone 22 can collect the sound signal in the real human ear to reduce errors and improve the accuracy of the test results. The probe tube 30 includes a first end and a second end, the first end is used to be placed in the ear canal and can collect sound in a directional manner; the second end is connected to the second microphone 22 component to transmit the sound to the second microphone 22.

[0060] Optionally, the probe tube 30 is made of a soft elastic material, such as silicone rubber, to ensure that the probe tube 30 can adapt to the physiological structure in the ear, bend and reach a suitable position. It can be understood that the probe tube 30 is relatively small in size, and the elastic material and the relatively small size can ensure that the probe tube 30 can be worn in the ear together with the protective earpiece 200, and the wall of the probe tube 30 has a certain thickness and can provide a certain support performance for the probe tube 30, so as to prevent the probe tube 30 from being squeezed and collapsed by the protective earpiece 200, and ensure that the sound in the tube can be smoothly transmitted.

[0061] In addition, the probe tube 30 is replaceable. When a probe tube 30 of different specifications or materials is needed for testing, the probe tube 30 is separated from the second microphone 22 and the protective earwear 200 and replaced.

[0062] In some embodiments, the sound pickup device 20 includes a packaging shell 23 arranged outside the ear canal, the packaging shell 23 has a closed sealed cavity, the first microphone 21 and the second microphone 22 are encapsulated in the sealed cavity, the packaging shell 23 has a through hole connected to the sealed cavity, and the probe 30 is connected to the second microphone 22 through the through hole.

[0063] Optionally, the packaging shell 23 can be in the shape of an earphone, wherein "earphone" includes any speaker, microphone, and associated structure that is intended to be inserted into the ear canal of a listener or otherwise acoustically coupled to the ear canal, and includes but is not limited to earphones, earplugs, headphones, and other similar devices that can be inserted into or otherwise acoustically coupled to a person's ear canal.

[0064] In some embodiments, the signal releasing step S20 includes: releasing a plurality of sound signals to the first microphone 21 and the second microphone 22 through the detection sound source 10 , wherein the frequencies of the sound signals are different.

[0065] By sending multiple sound signals to the ear, and each sound signal has a different frequency, the sound pressure level of the sound signal outside and inside the ear canal can be measured based on different frequencies, making the test structure more accurate and comprehensive. Specifically, the test method of the embodiment of the present application can measure sound signals of seven standard frequencies within five seconds.

[0066] In some embodiments, the number of protective earmuffs 200 is set to two, and the two protective earmuffs 200 are respectively worn on two ears of the tester, wherein the connecting step S10 includes: connecting the two sound pickup devices 20 to the two protective earmuffs 200 respectively.

[0067] Two sound pickup devices 20 are provided, and the two sound pickup devices 20 are respectively provided for the two ears of the human body. It can be understood that at this time, both ears of the tester are wearing protective earwear 200. By connecting the two sound pickup devices 20 to the two protective earwear 200 respectively, the protective earwear 200 of the left and right ears can be tested synchronously, thereby further improving the accuracy and efficiency of the test.

[0068] In some embodiments, the detection step S40 includes: the test structure obtains a personal sound attenuation value according to the first signal to be tested and the second signal to be tested, and determines the sound insulation effect of the protective earwear 200 according to the personal sound attenuation value.

[0069] Specifically, the test structure can calculate the difference between the sound pressure level of the sound signal outside the ear canal and the sound pressure level of the sound signal inside the ear canal to obtain a personal sound attenuation value, and analyze the sound insulation effect of the protective earwear 200 through the personal sound attenuation value.

[0070] In another possible embodiment, the testing method comprises:

[0071] Calibration step S101 : performing a calibration test on the sound pickup device 20 .

[0072] Connecting step S102: connecting the sound pickup device 20 to the protective eargear 200, the protective eargear 200 is worn on the ear and blocks the ear canal, the sound pickup device 20 includes a first microphone 21 and a second microphone 22, and the second microphone 22 at least partially passes through the protective eargear 200 and communicates with the ear canal;

[0073] Signal release step S103: releasing a sound signal to the first microphone 21 and the second microphone 22 by detecting the sound source 10;

[0074] Measuring step S104: measuring the sound pressure level of the sound signal outside the ear canal by the first microphone 21 and generating a first signal to be measured, and measuring the sound pressure level of the sound signal inside the ear canal by the second microphone 22 and generating a second signal to be measured;

[0075] Detection step S105: Detecting the first signal to be tested and the second signal to be tested by using the test structure.

[0076] In some embodiments, the calibration step S101 includes:

[0077] Signal sending step S1011: releasing the test audio to the sound pickup device 20 through the detection sound source 10;

[0078] Receiving step S1012: the sound pickup device 20 receives the test audio and generates a third signal to be tested;

[0079] Determination step S1013: the test structure detects the third test signal and determines whether the performance parameters of the sound pickup device 20 are consistent with the factory specification parameters.

[0080] The detection sound source 10 sends a test audio to the sound pickup device 20 before the test, so as to calibrate the sound pickup device 20 and confirm whether the factory specification parameters of the sound pickup device 20 are accurate. If there is a slight deviation, it is adjusted by calibration compensation gain; if the deviation is too large, it means that the quality of the first microphone 21 and the second microphone 22 in the sound pickup device 20 is problematic, and the sound pickup device 20 needs to be replaced.

[0081] Specifically, the detection sound source 10 includes a detection host 11, which includes a sound outlet for emitting sound signals, and the sound outlet is arranged toward the human head. Specifically, the test structure is a computer, and the detection host 11 is connected to the computer in communication, and the detection host 11 and the computer can be connected via a USB cable.

[0082] Furthermore, the detection host 11 is provided with a speaker, a power amplifier and an acquisition card. The computer is connected to the acquisition card via USB. The acquisition card converts the signal and transmits it to the power amplifier for amplification. The power amplifier is used to amplify the sound signal generated by the computer and transmit it to the speaker, thereby ensuring that the power of the sound signal is sufficient to drive subsequent devices.

[0083] In some embodiments, before the signal sending step, the sound pickup device 20 is connected to the detection host 11 so that the sound pickup device 20 is directly opposite to the sound outlet, thereby stabilizing the state of the sound pickup device 20, and calibrating the sound pickup device 20 to improve the accuracy of the calibration.

[0084] In some embodiments, the detection host 11 includes a first connection portion 111 disposed at the sound outlet, and the sound pickup device 20 includes a second connection portion 24 adapted to the first connection portion 111, and the first connection portion 111 and the second connection portion 24 are detachably connected. Therefore, the sound pickup device 20 can be connected to the detection host 11 through the first connection portion 111 and the second connection portion 24, so that the state of the sound pickup device 20 is stabilized, and the sound pickup device 20 is calibrated, thereby improving the accuracy of the calibration.

[0085] Specifically, the first connection portion 111 may be a hanging hole, and the second connection portion 24 may be a hook adapted to the hanging hole. By hanging the hook on the hanging hole, the state of the sound pickup device 20 is stabilized.

[0086] In some embodiments, the connecting step S10 and the signal releasing step S20 further include:

[0087] Adjustment step S200: Adjust the detection host 11 to a preset height so that the sound outlet is on the same horizontal line with the nose tip of the tester.

[0088] Specifically, the detection sound source 10 also includes a base 12 and a height adjustment rod 13 connected to the base 12. The detection host 11 is connected to the top of the height adjustment rod 13. The length of the height adjustment rod 13 is adjustable to move the detection host 11 to a preset height. Specifically, the preset height is the height at which the sound outlet of the detection host 11 is directly opposite to the nose tip of the tester. By moving the detection host 11 to the preset height, the sound pickup device 20 can better receive the sound signal, making the test result more accurate. Optionally, during the test, the distance between the sound outlet of the test host and the nose tip of the tester is 300 mm.

[0089] Specifically, the height adjustment rod 13 may include two rod bodies that are socketed with each other and a screwing structure 131. Through threaded cooperation, the relative positions of the two rod bodies in the height direction can be adjusted by screwing the screwing structure 131, thereby adjusting the length of the height adjustment rod 13 and further adjusting the height of the detection host 11.

[0090] In some embodiments, the connecting step S10 includes: wearing the test glasses on the ears, clamping and fixing the sound pickup device 20 to the test glasses by the mounting clip 62 , and connecting the sound pickup device 20 to the protective earwear 200 .

[0091] The test glasses include a glasses frame 61 and a mounting clip 62 disposed on the glasses frame 61. The mounting clip 62 is used to fix the sound pickup device 20 to the test glasses, so that the position of the sound pickup device 20 is stable during the test, thereby achieving a better sound pickup effect and a more accurate test result. Optionally, the mounting clip 62 can also be used in conjunction with the glasses worn by the tester himself, and this application does not make a sole limitation on this.

[0092] In some embodiments, the two sound pickup devices 20 are respectively connected to two cables 40 , and one end of the cable 40 away from the sound pickup device 20 is connected to the detection sound source 10 through an audio connector 50 .

[0093] Specifically, the two cables 40 are connected to the detection host 11 through the audio connector 50. During the test, the connection point of the two cables 40 can be placed on the tip of the tester's nose. Since the two ears of the human body are symmetrical with respect to the tip of the nose, the connection point of the two cables 40 is placed on the tip of the tester's nose. The positions of the two sound pickup devices 20 can be adjusted based on the tip of the nose to make the positions of the two sound pickup devices 20 symmetrical, thereby making the test results more accurate.

[0094] The test process of the present application is as follows: first, let the tester wear the protective earwear 200: then, the tester inserts the two sound pickup devices 20 into the probe tubes 30 connected to the protective earwear 200 in the left and right ears respectively, and the connection of the two cables 40 can be placed at the tip of the nose, ensuring that the USB cable of the detection host 11 is connected to the computer and checking that the device has been recognized normally; then send a test signal through the system operation interface, and the speaker starts to play a specific sound signal; click the "Start Test" button on the system interaction interface, and measure the sound pressure level inside and outside the two-ear protective earwear 200 at the same time. The test duration is controlled within 5 seconds to measure the sound signal of 7 standard frequencies; after the test, the system automatically calculates and displays the tester's personal sound attenuation value, and the result of whether the protection test passes or not can be observed on the interface; if "passed", it means that the hearing protector can provide sufficient noise protection. The "failed" result means that the hearing protector is not worn correctly, or the protective earwear 200 that is not suitable for the size or shape of the tester's ear canal is selected, and the tester does not get enough protection.

[0095] In summary, the testing method provided in the present application can detect the sound insulation effect of the protective earmuffs 200 by simply connecting the sound pickup device 20 to the protective earmuffs 200. Therefore, the testing can be performed when the protective earmuffs 200 are worn on the ears. The sound insulation effect of the protective earmuffs 200 can be detected more realistically, and the influence of individual differences on the accuracy of the test results can be effectively reduced, thereby improving the accuracy and applicability of the test and ensuring that the user can choose and wear the most suitable protective earmuffs 200.

[0096] The above are only optional embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A testing method for detecting the sound insulation effect of protective earwear (200), characterized in that: The following steps are involved: Connecting step: connecting the sound pickup device (20) to the protective earpiece (200), wherein the protective earpiece (200) is worn on the ear and blocks the ear canal, and the sound pickup device (20) comprises a first microphone (21) and a second microphone (22), wherein the second microphone (22) is in communication with the ear canal; Signal release step: releasing a sound signal to the first microphone (21) and the second microphone (22) by detecting a sound source (10); Measuring step: measuring the sound pressure level of the sound signal outside the ear canal by using the first microphone (21) and generating a first signal to be measured, and measuring the sound pressure level of the sound signal inside the ear canal by using the second microphone (22) and generating a second signal to be measured; Detection step: Detecting the first signal to be tested and the second signal to be tested by a test structure.

2. The testing method according to claim 1, characterized in that: The sound pickup device (20) is arranged outside the ear canal; In the connecting step, the second microphone (22) is connected to the protective eargear (200) via a probe tube (30), one end of the probe tube (30) extends into the ear canal, and the other end of the probe tube (30) is connected to the second microphone (22), and the probe tube (30) is used to transmit the sound in the ear canal to the second microphone (22).

3. The testing method according to claim 2, characterized in that: The signal release step comprises: A plurality of sound signals are released to the first microphone (21) and the second microphone (22) through the detection sound source (10), and the frequencies of the sound signals are different.

4. The testing method according to claim 3, characterized in that: The number of the protective earpieces (200) is set to two, and the two protective earpieces (200) are respectively worn on the two ears of the tester, and the connecting step comprises: The two sound pickup devices (20) are respectively connected to the two protective earpieces (200).

5. The testing method according to claim 1, characterized in that: The detection step comprises: The test structure obtains a personal sound attenuation value according to the first signal to be tested and the second signal to be tested, and determines the sound insulation effect of the protective earwear (200) according to the personal sound attenuation value.

6. The testing method according to any one of claims 1 to 5, characterized in that: The connecting step also includes: Calibration step: performing a calibration test on the sound pickup device (20).

7. The testing method according to claim 6, characterized in that: The calibration steps include: Signal sending step: releasing test audio to the sound pickup device (20) through the detection sound source (10); Receiving step: the sound pickup device (20) receives the test audio and generates a third signal to be tested; Judgment step: the test structure detects the third signal to be tested, and determines whether the performance parameters of the sound pickup device (20) are consistent with the factory specification parameters.

8. The testing method according to claim 7, characterized in that: The detection sound source (10) comprises a detection host (11), and the detection host (11) is provided with a sound outlet for emitting the sound signal; Before the signal sending step, the sound pickup device (20) is connected to the detection host (11) so that the sound pickup device (20) is directly opposite to the sound outlet.

9. The testing method according to claim 8, characterized in that: The connecting step and the signal releasing step also include: Adjustment step: adjusting the detection host (11) to a preset height so that the sound outlet is on the same horizontal line as the nose tip of the tester.

10. The testing method according to any one of claims 1 to 5, characterized in that: The connecting step comprises: The test glasses are worn on the ears, the sound pickup device (20) is clamped and fixed on the test glasses by a mounting clip (62), and the sound pickup device (20) is connected to the protective earpiece (200).

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