Noise detection system and method

Abstract

The invention discloses a noise detection method, which comprises the following steps of: acquiring a first environment audio outside a soundproof box by using a first microphone, placing a to-be-detected object for making a sound in the soundproof box, judging whether the volume value of the first environment audio exceeds a volume threshold value or not, and when judging that the volume value of the first environment audio exceeds the volume threshold value, judging that the to-be-detected object emits the sound; and when the volume value of the first environment audio is judged to exceed the volume threshold value, not recording the volume value of the sound emitted by the object to be detected and obtained by the second microphone in the soundproof box, and when the volume value of the first environment audio is judged not to exceed the volume threshold value, recording the volume value of the sound emitted by the object to be detected and obtained by the second microphone in the soundproof box.

Description

TECHNICAL FIELD

[0001] The present application relates to a noise detection system and method. BACKGROUND

[0002] When a soundproof box is used to test a noise of an object, the noise detection result of the object in the soundproof box is often affected by noises from outside the soundproof box (e.g. human conversation, door closing, etc.). These short-time and uncontrollable noises from outside often affect the noise detection result of the object in the soundproof box, and thus cause the measurement result to be distorted, which cannot effectively evaluate the real noise condition of the object, and affects the test accuracy and reliability. SUMMARY

[0003] In view of the above, the present application provides a noise detection system and method to solve the above problems.

[0004] The noise detection method according to an embodiment of the present application comprises: obtaining, by a first microphone, a first ambient audio outside a soundproof box, while the soundproof box has an object emitting a sound placed therein; determining whether a volume value of the first ambient audio exceeds a volume threshold; when it is determined that the volume value of the first ambient audio exceeds the volume threshold, not recording a volume value of the sound emitted by the object obtained by a second microphone inside the soundproof box; and when it is determined that the volume value of the first ambient audio does not exceed the volume threshold, recording the volume value of the sound emitted by the object obtained by the second microphone inside the soundproof box.

[0005] In an embodiment of the above method of the present application, the method further comprises:

[0006] obtaining, by the first microphone, a second ambient audio outside the soundproof box, while the soundproof box has no object placed therein or the object does not emit the sound; and

[0007] taking the volume value of the second ambient audio as the volume threshold.

[0008] In an embodiment of the above method of the present application, not recording the volume value of the sound emitted by the object obtained by the second microphone inside the soundproof box comprises:

[0009] controlling the second microphone not to receive the sound.

[0010] In an embodiment of the above method of the present application, the method further comprises:

[0011] comparing a frequency spectrum of the sound emitted by the object with a standard frequency spectrum of the object; and

[0012] when a volume difference between the frequency spectrum of the sound emitted by the object and the standard frequency spectrum reaches an alarm value, outputting a notification.

[0013] In an embodiment of the above method of the present application, the method further comprises:

[0014] storing a plurality of default voltage values into a power control device for the object under test, and

[0015] recording a plurality of frequency spectrums of the object under test corresponding to the plurality of default voltage values, wherein the plurality of frequency spectrums include the frequency spectrum.

[0016] The noise detection system according to an embodiment of the present application comprises a soundproof box, a first microphone, a second microphone, and a processing device. The first microphone is located outside the soundproof box and is used to obtain a first ambient audio outside the soundproof box, while the soundproof box has a sound-emitting object under test placed inside. The second microphone is located inside the soundproof box. The processing device is connected to the first and second microphones and is used to: determine whether a volume value of the first ambient audio exceeds a volume threshold; when it is determined that the volume value of the first ambient audio exceeds the volume threshold, not record a volume value of a sound emitted by the object under test obtained by the second microphone inside the soundproof box; and when it is determined that the volume value of the first ambient audio does not exceed the volume threshold, record the volume value of the sound emitted by the object under test obtained by the second microphone inside the soundproof box.

[0017] In an embodiment of the system described above,

[0018] The first microphone is further used to obtain a second ambient audio outside the soundproof box, while the soundproof box has no object under test placed inside or the object under test does not emit the sound,

[0019] The processing device is further used to take the volume value of the second ambient audio as the volume threshold.

[0020] In an embodiment of the system described above, the processing device is used to control the second microphone not to perform sound recording when it is determined that the volume value of the first ambient audio does not exceed the volume threshold.

[0021] In an embodiment of the system described above, the processing device is further used to compare a frequency spectrum of the sound emitted by the object under test with a standard frequency spectrum corresponding to the object under test, and output a notification when a volume difference between the frequency spectrum of the sound emitted by the object under test and the standard frequency spectrum reaches an alarm value.

[0022] In an embodiment of the system described above, the processing device is further connected to a power control device for providing power to the object under test. The processing device is used to store a plurality of default voltage values into the power control device. The power control device is used to supply power to the object under test with the plurality of default voltage values in turn. The processing device is used to record a plurality of frequency spectrums of the object under test corresponding to the plurality of default voltage values, wherein the plurality of frequency spectrums include the frequency spectrum.

[0023] In summary, the noise detection system and method according to one or more embodiments of the present invention can be used to identify noise outside the soundproof box to prevent transiently changing environmental noise from interfering with the test results of the test object.

[0024] The foregoing description of the disclosure and the following description of the embodiments are intended to demonstrate and explain the spirit and principles of the present invention, and to provide a further explanation of the scope of the patent application of the present invention. Attached Figure Description

[0025] Figure 1 A schematic diagram of a noise detection system according to an embodiment of the present invention.

[0026] Figure 2 A flowchart illustrating a noise detection method according to an embodiment of the present invention.

[0027] Figure 3 A flowchart illustrating the setting of a volume threshold according to an embodiment of the present invention.

[0028] Figure 4 A flowchart illustrating the detection of noise in a test object according to an embodiment of the present invention.

[0029] Figure 5 An example diagram illustrating the spectrum of the test object and the standard spectrum according to an embodiment of the present invention.

[0030] In the attached figures, the following labels are used:

[0031] 1: Noise Detection System

[0032] 10: Soundproof box

[0033] 11: First microphone

[0034] 12: Second microphone

[0035] 13: Processing device

[0036] A1: Test sample

[0037] L1: Spectrum

[0038] L2: Standard spectrum

[0039] P1: Data point

[0040] S101, S103, S105, S107, S201, S203, S301, S303: Steps Detailed Implementation

[0041] The following detailed description of the features and advantages of the present invention in the embodiments is sufficient to enable any person skilled in the art to understand the technical content of the present invention and implement it accordingly. Based on the disclosure, patent claims, and drawings in this specification, any person skilled in the art can easily understand the related objectives and advantages of the present invention. The following embodiments are further detailed in illustrating the viewpoints of the present invention, but are not intended to limit the scope of the present invention in any way.

[0042] Please refer to this as well. Figure 1 ,in Figure 1 A schematic diagram of a noise detection system according to an embodiment of the present invention. Figure 1 As shown, the noise detection system 1 includes a soundproof enclosure 10, a first microphone 11, a second microphone 12, and a processing device 13. The processing device 13 is electrically or communicatively connected to the first microphone 11 and the second microphone 12.

[0043] The soundproof enclosure 10 contains the device under test (DUT) A1 and a second microphone 12. The soundproof enclosure 10 can be a silent enclosure. The DUT A1 may include one or more of the following: a fan, a motherboard, a display adapter, and a power supply.

[0044] The first microphone 11 is located outside the soundproof enclosure 10 and is used to acquire the ambient audio outside the soundproof enclosure 10, while the object under test A1 inside the soundproof enclosure 10 emits sound simultaneously. Furthermore, the distance between the first microphone 11 and the soundproof enclosure 10 may not exceed the sound-receiving distance of the first microphone 11. The second microphone 12 is located inside the soundproof enclosure 10 and is used to acquire information about the sound emitted by the object under test A1.

[0045] The processing device 13 is used to determine whether to record the sound emitted by the object under test A1 based on the first ambient audio outside the soundproof box 10. The processing device 13 may include one or more processors, such as a central processing unit, graphics processor, microcontroller, programmable logic controller, or other processor with signal processing capabilities.

[0046] Please refer to this as well. Figure 1 and Figure 2 ,in Figure 2 A flowchart illustrating a noise detection method according to an embodiment of the present invention. Figure 2As shown, the noise detection method includes: step S101: acquiring a first ambient audio signal outside the soundproof box using a first microphone, while a test object emitting sound is placed inside the soundproof box; step S103: determining whether the volume value of the first ambient audio signal exceeds a volume threshold; when the determination result of step S103 is "yes", proceeding to step S105: not recording the volume value of the sound emitted by the test object acquired by the second microphone inside the soundproof box; and when the determination result of step S103 is "no", proceeding to step S107: recording the volume value of the sound emitted by the test object acquired by the second microphone inside the soundproof box.

[0047] In step S101, the first microphone 11 acquires the first ambient audio of the surrounding environment outside the soundproof box 10, while the test object A1 that emits sound is placed inside the soundproof box 10. That is, while the test object A1 is being tested and generating noise, the first microphone 11 measures the external environment of the soundproof box 10 to generate the first ambient audio.

[0048] In step S103, the processing device 13 obtains the first ambient audio from the first microphone 11 and determines whether the volume value of the first ambient audio exceeds a volume threshold. For example, the volume threshold may be the steady-state volume value of the surrounding environment outside the soundproof box 10, or it may be the sum of the steady-state volume value and a default error value (e.g., 3 dB).

[0049] When the processing device 13 determines that the volume value of the first ambient audio is greater than the volume threshold, in step S105, the processing device 13 does not record the volume value of the sound emitted by the test object A1 obtained by the second microphone 12 inside the soundproof box 10. Further, one embodiment of step S105 may include the processing device 13 controlling the second microphone 12 not to pick up sound.

[0050] When the processing device 13 determines that the volume value of the first ambient audio is not greater than the volume threshold, in step S107, the processing device 13 records the volume value of the sound emitted by the test object A1 obtained by the second microphone 12 inside the soundproof box 10. For example, the processing device 13 can record the spectrum of the sound emitted by the test object A1. Accordingly, the processing device 13 can analyze the noise test data of the test object A1.

[0051] The noise detection system and method according to one or more of the above embodiments can be used to identify noise outside the soundproof box to prevent transiently changing environmental noise from interfering with the test results of the test object.

[0052] Please refer to this as well. Figure 1 and Figure 3 ,in Figure 3 A flowchart illustrating the setting of a volume threshold according to an embodiment of the present invention. Figure 3As shown, the method for setting the volume threshold may include: step S201: acquiring a second ambient audio outside the soundproof box with a first microphone, while no object to be tested is placed inside the soundproof box or the object to be tested does not emit sound; and step S203: using the volume value of the second ambient audio as the volume threshold. Figure 3 The steps shown can be performed at Figure 2 Before step S101.

[0053] In step S201, when the test object A1 is not being tested and emits noise, or when the test object A1 is not placed in the soundproof box 10, the first microphone 11 acquires the second ambient audio outside the soundproof box 10.

[0054] In step S203, the processing device 13 can use the volume value of the second ambient audio as... Figure 2 The volume threshold is determined in step S103. Additionally, the processing device 13 can acquire multiple second ambient audio signals and use the average volume value of these signals as the volume threshold. Therefore, when conducting noise testing on the object under test, the steady-state volume value can be used as a reference to identify noise outside the soundproof enclosure.

[0055] Please refer to this as well. Figure 1 , Figure 4 and Figure 5 ,in Figure 4 A flowchart illustrating the detection of noise in a test object according to an embodiment of the present invention is shown. Figure 5 An example diagram illustrating the spectrum of the test object and a standard spectrum according to an embodiment of the present invention. Figure 4 As shown, the method for detecting noise of the object under test may include: step S301: comparing the spectrum of the sound emitted by the object under test with the standard spectrum of the corresponding object under test; and step S303: outputting a notification when the volume difference between the spectrum of the sound emitted by the object under test and the standard spectrum reaches a warning value. Figure 4 The steps shown can be performed in Figure 2 After step S107. In other words, Figure 4 The step can be performed when it is determined that the volume value of the first ambient audio does not exceed the volume threshold.

[0056] In step S301, the processing device 13 compares the spectrum L1 of the sound emitted by the object under test A1 with the standard spectrum L2 of the object under test A1, and determines whether the difference between the spectrum L1 and the standard spectrum L2 is equal to or greater than a warning value. The processing device 13 can compare the volume values ​​(decibels) of the spectrum L1 and the standard spectrum L2 of the object under test A1 at each frequency to determine the volume difference for each frequency. The standard spectrum L2 is, for example, the spectrum provided by the manufacturer of the object under test A1, and different objects under test A1 may correspond to different standard spectra L2.

[0057] In step S303, if the processing device 13 determines that the volume difference between the spectrum L1 of the test object A1 and the standard spectrum L2 is equal to or greater than the warning value, the processing device 13 may output a notification indicating that the noise of the test object A1 is unreasonable. Figure 5 For example, at a frequency of approximately 1 kilohertz, the processing device 13 determines that the volume difference between data point P1 on the spectrum L1 of the test object A1 and the data point on the standard spectrum L2 at the corresponding frequency is greater than a warning value. Therefore, the processing device 13 can output a notification. The processing device 13 can output the notification to a display screen, and the notification may include a note on data point P1. Accordingly, the user can determine the frequency of the abnormal noise based on the notification to check whether the abnormality in spectrum L1 of the test object A1 is caused by problems such as assembly or product damage.

[0058] At Figure 4 In one embodiment, the processing device 13 may be connected to a power control device for providing power to the device under test A1, wherein the power control device may include one or more processors as described above for controlling the power source providing power to the device under test A1. Figure 2 Before step S101, multiple different default voltage values ​​are stored in a power control device. The power control device can supply power to the device under test A1 in turn using these multiple default voltage values, and the processing device 13 can record multiple spectra of the device under test A1 corresponding to these multiple default voltage values. Specifically, the power control device can supply power to the device under test A1 using the first default voltage value and execute... Figure 2 and Figure 4 The steps are as follows: Next, the power control device supplies power to the test object A1 with the second voltage value from the default voltage values, and executes... Figure 2 and Figure 4 The steps are repeated accordingly. Accordingly, the processing device 13 can obtain multiple spectra corresponding to different voltages, including the spectrum L1 of the test object A1. Based on this, the noise of the test object under different voltages can be tested. It should also be noted that the above-mentioned alternating power supply to the test object A1 at the default voltage value can also be performed by an operator.

[0059] In summary, the noise detection system and method according to one or more embodiments of the present invention can be used to identify noise outside the soundproof enclosure to prevent transiently changing environmental noise from interfering with the test results of the test object. Furthermore, by outputting a notification when the volume difference between the spectrum of the test object and the standard spectrum is equal to or greater than a warning value, the user can determine the frequency of the abnormal noise based on the notification, thereby verifying whether the test object's spectrum abnormality is caused by assembly issues, product damage, or other problems. In addition, by controlling the power control device to supply power to the test object at different voltages, the noise of the test object under different voltages can be tested.

[0060] While the present invention has been disclosed above with reference to the foregoing embodiments, it is not intended to limit the invention. Any modifications and refinements made without departing from the spirit and scope of the invention are within the scope of patent protection of the present invention. For the scope of protection defined in the present invention, please refer to the appended claims.

Claims

1. A noise detection method, characterized in that, Include: A first ambient audio signal outside a soundproof box is acquired using a first microphone, while a test object emitting sound is placed inside the soundproof box. Determine whether the volume value of the first ambient audio exceeds a volume threshold; When the volume value of the first ambient audio exceeds the volume threshold, the volume value of the sound emitted by the object under test, obtained by the second microphone inside the soundproof box, is not recorded; and When it is determined that the volume value of the first ambient audio does not exceed the volume threshold, the volume value of the sound emitted by the object under test obtained by the second microphone in the soundproof box is recorded.

2. The noise detection method as described in claim 1, characterized in that, Also includes: The first microphone acquires a second ambient audio signal outside the soundproof enclosure, while the test object is not placed inside the soundproof enclosure or the test object does not emit the sound; and The volume value of the second ambient audio is used as the volume threshold.

3. The noise detection method as described in claim 1, characterized in that, The volume value of the sound emitted by the object under test, acquired by the second microphone inside the soundproof enclosure, which is not recorded, includes: Control the second microphone to not pick up sound.

4. The noise detection method as described in claim 1, characterized in that, Also includes: Compare the spectrum of the sound emitted by the test object with a standard spectrum corresponding to the test object; and When the volume difference between the spectrum of the sound emitted by the object under test and the standard spectrum reaches the warning value, a notification is output.

5. The noise detection method as described in claim 4, characterized in that, Also includes: The power control device of the device under test stores multiple default voltage values. Record multiple spectra of the device under test corresponding to the multiple default voltage values, wherein the multiple spectra include the spectrum.

6. A noise detection system, characterized in that, Include: A soundproof box; A first microphone is located outside the soundproof box to acquire a first ambient audio signal outside the soundproof box, while a test object that emits sound is placed inside the soundproof box. A second microphone, located inside the soundproof enclosure; and A processing device, connected to the first microphone and the second microphone, is used for: Determine whether the volume value of the first ambient audio exceeds a volume threshold; When it is determined that the volume value of the first ambient audio exceeds the volume threshold, the volume value of the sound emitted by the object under test obtained by the second microphone is not recorded; as well as When it is determined that the volume value of the first ambient audio does not exceed the volume threshold, the volume value of the sound emitted by the object under test obtained by the second microphone in the soundproof box is recorded.

7. The noise detection system as described in claim 6, characterized in that, The first microphone is also used to acquire a second ambient audio signal outside the soundproof enclosure, provided that the object under test is not placed inside the soundproof enclosure or the object under test does not emit the sound. The processing device is also used to use the volume value of the second ambient audio as the volume threshold.

8. The noise detection system as described in claim 6, characterized in that, The processing device is used to control the second microphone to stop recording when it determines that the volume value of the first ambient audio does not exceed the volume threshold.

9. The noise detection system as described in claim 6, characterized in that, The processing device is also used to compare a spectrum of the sound emitted by the object under test with a standard spectrum corresponding to the object under test; and to output a notification when the volume difference between the spectrum of the sound emitted by the object under test and the standard spectrum reaches a warning value.

10. The noise detection system as described in claim 9, characterized in that, The processing device is also connected to a power control device for providing power to the device under test (DUT). The processing device is also used to store multiple default voltage values ​​in the power control device, the power control device alternately supplies power to the DUT with the multiple default voltage values, and the processing device records multiple spectra of the DUT corresponding to the multiple default voltage values, wherein the multiple spectra include the spectrum.

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