Listening detection device

Abstract

The present application provides a listening detection device comprising: a communication circuit comprising at least a first interface and at least one second interface; the first interface is used for being connected with sound source equipment; the second interface is used for being connected with a power amplifier channel of power amplifier equipment to be tested; the comparison circuit is respectively connected with the first interface and the at least one second interface; and the comparison circuit is configured to compare sound source signals correspondingly received by the first interface and the second interface so as to detect whether each power amplifier channel of the power amplifier equipment to be tested is normal or not. Through the above mode, the detection efficiency of the to-be-tested power amplifier device is effectively improved, and the accuracy of the test result is improved.

Description

Technical Field

[0001] The present application is applied to the technical field of power amplifier device detection, and in particular relates to a listening detection device. Background Art

[0002] A car amplifier is an audio power amplifier in a car's audio and video system. Its function is to select and pre-process the audio input signal, amplify the power, and ensure that the electrical signal has the power to drive the speakers. During the production process, car amplifiers undergo screening, and listening testing is a crucial step in the screening process.

[0003] However, in existing technologies, when selecting car amplifiers, most people manually listen to the sound and music by wearing headphones. However, selecting each channel of the amplifier by human ears can lead to errors in the master switch judgment and the lack of judgment on the volume. In addition, car amplifiers have many channels, with 12-20 being common. The human ear can only hear the sound of a single channel at a time, which is also inefficient. Utility Model Content

[0004] The present application provides a listening detection device to solve the problem of low detection efficiency of power amplifier devices in the prior art.

[0005] To solve the above technical problems, the present application provides a listening detection device, comprising: a communication circuit, the communication circuit comprising at least a first interface and at least one second interface; the first interface is used to connect to a sound source device; the second interface is used to connect to an amplifier channel of a power amplifier device to be tested; a comparison circuit, respectively connected to the first interface and the at least one second interface; the comparison circuit is configured to compare the sound source signals received corresponding to the first interface and the second interface to detect whether each power amplifier channel of the power amplifier device to be tested is normal.

[0006] Among them, the first interface is configured to receive a first sound source signal of the sound source device playing test music, and the second interface is configured to receive a second sound source signal of the test music transmitted by the power amplifier device to be tested; the listening detection device also includes: a control switch, the control switch is respectively connected to the first interface, the second interface, and the comparison circuit; the control circuit is connected to the control switch, the second interface and the comparison circuit; the control switch is configured to be turned on when the control circuit detects the input of the second sound source signal, and the first sound source signal and the second sound source signal are waveform-aligned and input into the comparison circuit, and the comparison circuit is configured to compare the first sound source signal and the second sound source signal.

[0007] The listening detection device further includes: an attenuation circuit, which is connected to the second interface and the control circuit and is configured to attenuate and sample the second sound source signal, and input the sampled attenuated signal into the control circuit to turn on the control switch.

[0008] The attenuation circuit is connected to an interrupt pin of the control circuit. The control circuit receives an interrupt signal generated by the attenuation circuit and controls the control switch to be turned on.

[0009] The listening detection device further includes a display unit connected to the control circuit and configured to display a comparison result of the comparison circuit.

[0010] The listening detection device further includes a third interface, which is connected to the control circuit and configured to be connected to an external processor.

[0011] Among them, the control switch is an analog switch

[0012] Wherein, the comparison circuit includes a Schmitt comparator.

[0013] The first interface and the second interface include aviation plugs.

[0014] The first audio source signal received by the first interface and the second audio source signal received by the second interface may be from different or the same audio source device.

[0015] The beneficial effect of the present application is: different from the existing technology, the present application connects the audio source device to the first interface of the communication circuit and connects the power amplifier device to be tested to the second interface. When the power amplifier device to be tested is tested, the first interface receives the audio source signal of the test music played by the audio source device and transmits it to the comparison circuit, and the second interface receives the audio source signal of the test music played by the audio source device transmitted by the power amplifier device to be tested and transmits it to the comparison circuit. The first interface and the second interface respectively receive the audio source signals received to determine whether the power amplifier device to be tested has an abnormality, thereby effectively improving the efficiency of detecting the power amplifier device to be tested and improving the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural block diagram of an embodiment of the listening detection device of the present application;

[0017] Figure 2 This is a structural block diagram of the connection between the listening detection device of the present application, the sound source device, and the detection device to be tested;

[0018] Figure 3 This is a structural block diagram of another embodiment of the listening detection device of the present application;

[0019] Figure 4 It is a structural diagram of the listening detection device of this application. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0021] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0022] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their 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 at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0023] See also Figure 1 , Figure 1 This is a structural block diagram of an embodiment of the listening detection device provided by this application.

[0024] This application provides a listening detection device, such as Figure 1 As shown, a listening detection device of this embodiment includes: a communication circuit 10 and a comparison circuit 40. The communication circuit 10 includes at least a first interface 101 and at least a second interface 102. Figure 2As shown, a first interface 101 is used to connect to the audio source device 20, and a second interface 102 is used to connect to the power amplifier channel of the power amplifier device 30 under test. A comparison circuit 40 is connected to the first interface 101 and at least one second interface 102. Specifically, the listening detection device communicates with the audio source device 20 and the power amplifier device 30 under test via the communication circuit 10, thereby transmitting signals from the audio source device 20 and the power amplifier device 30 under test to the comparison circuit 40 via the communication circuit 10. The comparison circuit 40 is configured to compare the audio source signals received by the first interface 101 and the second interface 102 to detect whether each power amplifier channel of the power amplifier device 30 under test is functioning properly. Specifically, the first interface 101 receives the audio source signal played by the audio source device 20, and the second interface 102 receives the audio source signal played by the power amplifier device 30 under test, which is then transmitted to the comparison circuit via the first interface 101 and the second interface 102. The audio source signals transmitted by the first interface 101 and the second interface 102 are compared by a comparison circuit, thereby detecting whether the power amplifier channel of the power amplifier device 30 to be tested is normal.

[0025] In this embodiment, the first interface 101 and the second interface 102 are each provided with multiple signal channels, for example, 15 signal channels. Preferably, the first interface 101 and the second interface 102 are provided with 12-20 signal channels, thereby coping with different power amplifier devices 30 to be tested, effectively ensuring that when the power amplifier device 30 to be tested is tested, each power amplifier channel can correspond to the signal channel of the second interface 102, thereby avoiding the situation where the power amplifier channel of the power amplifier device 30 to be tested is incompletely tested. The number of signal channels provided for the first interface 101 and the second interface 102 can be specifically set according to the process or test requirements, and this application does not make any specific restrictions here.

[0026] In an optional embodiment, when testing the power amplifier device 30 to be tested, the power amplifier device 30 to be tested and the sound source device 20 are communicatively connected to the communication circuit 10. Specifically, the sound source device 20 is connected to the first interface 101 of the communication circuit 10, and the power amplifier device 30 to be tested is connected to the second interface 102 of the communication circuit 10. The sound source signal of the power amplifier device 30 to be tested originates from the sound source device 20. That is, after the sound source device 20 is started, the sound source signal is transmitted to the first interface 101 of the communication circuit 10 and the power amplifier device 30 to be tested, respectively, so that the sound source device 20 provides a sound source for the power amplifier device to be tested. When testing the power amplifier device 30 to be tested, the sound source device 20 is communicatively connected to the first interface 101 of the communication circuit 10 and the power amplifier device 30 to be tested, and the power amplifier device 30 to be tested is communicatively connected to the second interface 102 of the communication circuit 10. At this time, the sound source device 20 continues to provide a sound source signal, and the first interface 101 of the communication circuit 10 receives the sound source signal of the test music played by the sound source device 20. After the power amplifier device 30 under test receives the sound source signal from the sound source device 20, the second interface 102 of the communication circuit 10 receives the sound source signal of the test music played by the sound source device 20 transmitted by the power amplifier device 30 under test. After the first interface 101 and the second interface 102 receive the corresponding sound source signals, the sound source signals are transmitted to the comparison circuit 40 through the first interface 101 and the second interface 102. The comparison circuit 40 then compares the sound source signal of the test music played by the sound source device 20 with the sound source signal of the test music played by the sound source device 20 transmitted by the power amplifier device 30 under test to determine whether the channel signals of the sound source signals transmitted through the first interface 101 and the second interface 102 are consistent, thereby determining whether each amplifier channel of the power amplifier device 30 under test is normal. That is, the comparison circuit compares the audio source signal transmitted by the audio source device 20 with the audio source signal played by the power amplifier device 30 to be tested, thereby effectively improving the test efficiency of the power amplifier device 30 to be tested and preventing inaccurate test results from occurring.

[0027] In this embodiment, when testing the power amplifier device 30 under test, the audio source device 20 plays test music and transmits it to the comparison circuit 40 via the first interface 101. The power amplifier device 30 under test then transmits the music to the comparison circuit 40 via the second interface 102. The comparison circuit 40 can compare the audio source signal received by the power amplifier device 30 under test from the audio source device 20 with the audio source signal transmitted by the audio source device 20. Since the audio source signal received by the second interface 102 is transmitted to the comparison circuit 40 by the audio source device 20 via the power amplifier device 30 under test, if some channels in the power amplifier device 30 under test have an abnormality, some channels of the test music played by the audio source device 20 will be without signal after being played by the power amplifier device 30 under test, resulting in some channels of the test music transmitted by the audio source device 20 being without signal when played by the power amplifier device 30 under test. That is, after the power amplifier device 30 under test transmits a sound source signal with no signal in some channels to the comparison circuit 40, the comparison circuit 40 compares the sound source signals received by the first interface 101 and the second interface 102, and determines that some channels of the sound source signal transmitted by the power amplifier device 30 under test are missing signals, thereby determining that an abnormality exists in the power amplifier device 30 under test. Conversely, when all channels of the power amplifier device 30 under test are normal, the sound source signal transmitted by the power amplifier device 30 under test and the sound source signal transmitted by the sound source device 20 do not differ in transmission channels, thereby determining that there is no abnormality in the power amplifier device 30 under test. Specifically, when the comparison circuit 40 compares the sound source signals received by the first interface 101 and the second interface 102, it not only detects each power amplifier channel of the power amplifier device 30 under test, but also detects the volume of the sound source signal transmitted by the power amplifier device 30 under test, thereby determining whether there is an abnormality in the volume transmitted by the power amplifier device 30 under test.

[0028] The first interface 101 and the second interface 102 can be set to multiple, so that when detecting the power amplifier device 30 to be tested, multiple devices can be detected at the same time, thereby improving the detection efficiency. This application does not make specific limitations here.

[0029] In a specific application scenario, a listening detection device is used to test a vehicle-mounted power amplifier device. The first interface 101 of the communication circuit 10 is connected to the sound source device 20, and the vehicle-mounted power amplifier device is connected to the sound source device 20 and the second interface 102 of the communication circuit 10. The sound source device 20 is started to play test music, so that the sound source signal of the test music played by the sound source device 20 is transmitted to the comparison circuit 40. The comparison circuit 40 receives the sound source signal of the test music played by the sound source device 20 transmitted by the vehicle-mounted power amplifier device. The comparison circuit 40 compares the sound source signals received by the first interface 101 and the second interface 102 respectively to determine whether there is any abnormality in the vehicle-mounted power amplifier device.

[0030] In the above embodiment, by connecting the audio source device 20 to the first interface 101 of the communication circuit 10 and connecting the power amplifier device 30 to be tested to the second interface 102, when the power amplifier device 30 to be tested is tested, the first interface 101 receives the audio source signal of the test music played by the audio source device 20 and transmits it to the comparison circuit 40, and the second interface 102 receives the audio source signal of the test music played by the audio source device 20 transmitted by the power amplifier device 30 to be tested and transmits it to the comparison circuit 40. The first interface 101 and the second interface 102 respectively receive the received audio source signals to determine whether the power amplifier device 30 to be tested has an abnormality, thereby effectively improving the efficiency of detecting the power amplifier device 30 to be tested and improving the accuracy of the test results.

[0031] In an optional embodiment, if Figure 2 As shown, the first interface 101 is configured to receive a first audio source signal of test music played by the audio source device 20, the second interface 102 is configured to receive a second audio source signal of test music transmitted by the power amplifier device 30 to be tested, and the comparison circuit 40 is configured to compare the first audio source signal and the second audio source signal. In this embodiment, the listening detection device further includes a control switch 50 and a control circuit 60. The control switch 50 is connected to the first interface 101, the second interface 102, and the comparison circuit 40, respectively. The control circuit 60 is connected to the control switch 50, the second interface 102, and the comparison circuit 40. The control switch 50 is configured to be turned on when the control circuit 60 detects the input of the second audio source signal, and the first audio source signal and the second audio source signal are waveform-aligned and input to the comparison circuit 40. That is, when testing the power amplifier device 30 to be tested, the first sound source signal transmitted by the sound source device 20 is transmitted to the control switch 50 via the first interface 101, and the second sound source signal transmitted by the power amplifier device 30 to be tested is transmitted to the control switch 50 via the second interface 102. After the control switch 50 receives the first sound source signal and the second sound source signal, the first sound source signal and the second sound source signal, after waveform alignment, are transmitted to the comparison circuit 40 for comparison by the comparison circuit 40. The control circuit 60 is connected to the control switch 50, the second interface 102, and the comparison circuit 40. That is, after the power amplifier device 30 to be tested receives the test music played by the sound source device 20, the music is transmitted to the control circuit 60 via the second interface 102. After the control circuit 60 detects the second sound source signal, the interrupt pin of the control circuit 60 is turned on, allowing the second sound source signal to be transmitted to the control switch 50, and then transmitted to the comparison circuit 40 via the control switch 50, thereby comparing the first sound source signal with the second sound source signal. The control circuit 60 is also connected to the comparison circuit 40. After the comparison circuit 40 completes the comparison, the comparison result is transmitted to the control circuit 60. The control circuit 60 determines the channel difference between the second sound source signal and the first sound source signal, thereby determining whether there is an abnormality in the power amplifier device 30 to be tested.

[0032] In some optional embodiments, the control switch 50 may be an analog switch. That is, when the listening detection device is in use, the analog switch can be used to connect or disconnect the audio source signals transmitted between the first interface 101 and the second interface 102. Furthermore, when processing the first and second audio source signals, the analog switch can be used to filter and perform signal gain on the first and second audio source signals. This means that configuring the control switch 50 as an analog switch can effectively reduce the power consumption of the listening detection device and increase the speed of signal processing. Furthermore, because the analog switch has no mechanical contacts, it can prevent accidental touches, which could result in poor waveform alignment between the first and second audio source signals when transmitted to the comparison circuit 40. In other embodiments, the control switch may also be another type of switch, such as a digital switch, which is not specifically limited in this application.

[0033] In this embodiment, the first interface 101 and the second interface 102 include aviation plugs. That is, the first interface 101 and the second interface 102 of the communication circuit 10 are connected to the audio source device 20 and the power amplifier device under test 30, respectively, via aviation plugs, thereby ensuring the reliability and accuracy of the first audio source signal transmitted by the audio source device 20 and the second audio source signal transmitted by the power amplifier device under test 30. In other embodiments, the first interface 101 and the second interface 102 may also use other interfaces, such as a USB interface, to ensure the accuracy and reliability of the audio source signal transmission between the first interface 101 and the second interface 102.

[0034] In this embodiment, when the power amplifier device 30 to be tested is detected, since there is no delay in the first sound source signal transmitted from the sound source device 20 to the comparison circuit 40 through the first interface 101, that is, the first sound source signal played by the sound source device 20 is transmitted to the control switch 50 through the first interface 101 and waits. Since there is a certain delay when the sound source device 20 passes through the power amplifier device 30 to be tested and then transmitted to the control switch 50, when the control switch 50 receives the first sound source signal and waits, the power amplifier device 30 to be tested receives the test music played by the sound source device 20, and the second sound source signal played by the power amplifier device 30 to be tested is transmitted to the control circuit 60. After the control circuit 60 receives the second sound source signal, the control circuit 60 turns on and transmits it to the control switch 50. That is, at this time, the waveform of the second sound source signal transmitted to the control switch 50 by the control circuit 60 is aligned with the waveform of the first sound source signal. After receiving the first sound source signal and the second sound source signal with aligned waveforms, the control switch 50 transmits them to the comparison circuit 40, so that the comparison circuit 40 compares the first sound source signal and the second sound source signal with aligned waveforms to determine whether the second sound source signal has an abnormality in the power amplifier channel or volume, and transmits the comparison result to the control circuit 60, so that the control circuit 60 determines whether there is an abnormality in the power amplifier device 30 to be tested.

[0035] In an optional embodiment, the comparison circuit 40 includes a Schmidt comparator, and the test music played by the sound source device 20 is transmitted to the positive electrode of the Schmidt comparator through the first interface 101. The positive electrode of the Schmidt comparator is used to receive the first sound source signal transmitted by the sound source device 20, and the power amplifier device 30 to be tested is transmitted to the negative electrode of the Schmidt comparator through the second interface 102. That is, when the Schmidt comparator compares the first sound source signal and the second sound source signal, if the second sound source signal exceeds the hysteresis range of the Schmidt comparator, the Schmidt comparator reports an error, and it is determined that an abnormality occurs in a certain channel of the second sound source signal transmitted by the power amplifier device 30 to be tested. When there is no abnormality in the second sound source signal channel transmitted by the power amplifier device 30 to be tested, the control circuit 60 detects that there is no signal, then there is no abnormality in the second sound source signal transmitted by the power amplifier device 30 to be tested, and there is no abnormality in the power amplifier device 30 to be tested.

[0036] In other embodiments, the comparison circuit 40 may also use other hysteresis comparators, which can effectively avoid small fluctuations in the input signal that lead to frequent switching of the output signal, thereby improving the reliability and stability of the comparison circuit 40. This application does not make specific limitations here.

[0037] In an optional embodiment, if Figure 2 As shown, the listening test device further includes an attenuation circuit 70, which is connected to the second interface 102 and the control circuit 60 and is configured to attenuate and sample the second sound source signal, and input the sampled attenuated signal to the control circuit 60 to turn on the control switch 50. Specifically, the sound source plays a test sound source and transmits it to the power amplifier device 30 under test. The power amplifier device 30 under test receives the played music and transmits the second sound source signal. The attenuation circuit 70 receives the second sound source signal of the test music played by the sound source device 20 and transmits it from the power amplifier device 30 under test, thereby adjusting the power and amplitude of the second sound source signal to prevent the control circuit 60 from being damaged by excessive power after the second sound source signal is transmitted to the control circuit 60. The attenuation circuit 70 can also filter the second sound source signal transmitted by the power amplifier device 30 under test. After the second sound source signal of the power amplifier device 30 to be tested is transmitted to the attenuation circuit 70, the attenuation circuit 70 samples the second sound source signal and transmits the attenuation signal of the sampled second sound source signal to the control circuit 60. After the control circuit 60 receives the attenuation signal of the second sound source signal, the control circuit 60 can control the control switch 50 to open, thereby transmitting the second sound source signal to the control switch 50, so that the second sound source signal is aligned with the first sound source signal in the control switch 50, and then transmitted to the comparison circuit 40 for comparison.

[0038] In other embodiments, since the test sound source played by the sound source device 20 may generate noise after passing through the power amplifier device 30 to be tested, a filtering circuit can be set between the attenuation circuit 70 and the second interface 102, so that when the second sound source signal is transmitted to the attenuation circuit 70 through the second interface 102, the second sound source signal is filtered, thereby reducing the interference of noise when the subsequent comparison circuit 40 compares the first sound source signal with the second sound source signal, thereby accelerating the comparison efficiency of the comparison circuit 40 and effectively ensuring the accuracy of subsequent detection results.

[0039] In this embodiment, the attenuation circuit 70 is connected to an interrupt pin of the control circuit 60. The control circuit 60 receives an interrupt signal generated by the attenuation circuit 70 via the interrupt pin, thereby controlling the control switch 50 to conduct. Specifically, the power amplifier device 30 under test transmits the second audio signal to the attenuation circuit 70 via the second interface 102. The attenuation circuit 70 transmits the second audio signal to the interrupt pin of the control circuit 60, causing the control circuit 60 to receive the interrupt signal generated by the attenuation circuit 70. The control circuit 60 controls the control switch 50 to conduct, allowing the second audio signal to be attenuated by the attenuation circuit 70 and then transmitted to the control switch 50. Because the first audio signal has no delay, the first audio signal waits for the second audio signal when it is transmitted to the control switch 50. The second audio signal is transmitted between the control switch 50 and the control circuit 60 by the control circuit 60. After the control circuit 60 receives the interrupt signal generated by the attenuation circuit 70, it controls the control switch 50 to be turned on, so that the first sound source signal and the second sound source signal are transmitted to the comparison circuit 40 through the control switch 50 in a waveform-aligned manner. That is, by setting an interrupt pin in the control circuit 60, after the second sound source signal is transmitted to the control circuit 60, an interrupt signal can be generated to control the control switch 50 to be turned on, thereby facilitating the alignment of the waveforms of the first sound source signal and the second sound source signal, effectively improving the efficiency of subsequent comparison of the second sound source signal.

[0040] In an optional embodiment, the listening test device further includes a display unit 80, which is connected to the control circuit 60 and is configured to display the comparison result of the comparison circuit 40. Specifically, the first and second audio source signals are transmitted to the comparison circuit 40 via the control switch 50 in a waveform-aligned manner. If the second audio source signal exceeds the hysteresis interval of the Schmidt comparator, it is determined that an abnormality exists in the second audio source signal transmitted by the power amplifier device 30 under test. This indicates that an abnormality exists in a power amplifier channel of the power amplifier device 30 under test. The comparison circuit 40 transmits the comparison result to the control circuit 60. After receiving and analyzing the comparison result, the control circuit 60 determines that an abnormality exists in certain channels of the power amplifier device 30 under test and transmits the abnormal channels to the display unit 80. Displaying the abnormal channels of the power amplifier device 30 under test on the display unit 80 facilitates subsequent maintenance of the power amplifier device 30 under test. Furthermore, the first and second audio source signals include at least multi-channel signals and volume parameters. The listening detection device also includes a third interface 601, which is connected to the control circuit 60 and configured to connect to an external processor 90. Specifically, by connecting to the external processor 90 via the third interface 601, the external processor 90 can detect parameters such as the volume of the second sound source signal, thereby determining whether the volume and other parameters of the second sound source signal are abnormal. Specifically, by providing a display unit 80, after the control circuit 60 analyzes the comparison results of the comparison circuit 40, the analysis results can be transmitted to the display unit 80 for display, facilitating real-time observation of the analysis results and effectively improving the detection efficiency of the listening detection device.

[0041] In a specific application scenario, such as Figure 4As shown, when testing the power amplifier device 30 under test, the power amplifier device 30 under test is connected to the audio source device 20 and the second interface 102 of the communication circuit 10. The audio source device 20 is connected to the communication circuit 10, and the audio source device 20 is started to play test music. The audio source device 20 transmits the test music to the control switch 50 via the first interface 101 and waits. The test music from the audio source device 20 is played by the power amplifier device 30 under test, and the power amplifier device 30 under test outputs a second audio source signal. The second audio source signal is transmitted to the attenuation circuit 70 via the second interface 102, thereby attenuating the second audio source signal. The attenuation circuit 70 attenuates the second audio source signal and inputs the attenuation signal to the interrupt pin of the control circuit 60. After receiving the attenuation signal transmitted by the attenuation circuit 70, the control circuit 60 controls the control switch 50 to open, thereby aligning the waveform of the second audio source signal with the first audio source signal. The second audio source signal is then transmitted to the comparison circuit 40 via the control switch 50, and the comparison circuit 40 compares the first audio source signal with the second audio source signal. The comparison result is fed back to the control circuit 60. After receiving the comparison result, the control circuit 60 analyzes the result to determine whether there is any abnormality in the second sound source signal, and transmits the analysis result to the display unit 80. The display unit 80 displays the analysis result, thereby facilitating the maintenance of the power amplifier device 30 to be tested.

[0042] In other embodiments, the first audio source signal received by the first interface 101 and the second audio source signal received by the second interface 102 originate from different audio source devices. Specifically, two audio source devices 20 may be configured, one of which provides the first audio source signal to the communication circuit 10 and the other provides the second audio source signal to the power amplifier device 30 under test. Specifically, when testing the power amplifier device 30 under test, both audio source devices 20 continuously play the same test music. Specifically, one audio source device 20 is connected to the first interface 101 of the communication circuit 10 and transmits the first audio source signal to the control switch 50 via the first interface 101. The other audio source device 20 is connected to the second interface 102 of the communication circuit 10 and transmits the second audio source signal to the control circuit 60 via the second interface 102. Upon receiving the second audio source signal, the control circuit 60 opens the control switch 50, aligning the waveforms of the first and second audio source signals. These signals are then transmitted through the control switch 50 to the comparison circuit 40 for comparison.

[0043] In the above manner, the present application connects the audio source device 20 to the first interface 101 of the communication circuit 10 and connects the power amplifier device 30 to be tested to the second interface 102. When testing the power amplifier device 30, the first audio source signal of the audio source device 20 is transmitted to the comparison circuit 40 via the first interface 101, and the second audio source signal of the power amplifier device to be tested is transmitted to the comparison circuit 40 via the second interface 102. This allows the second audio source signal transmitted from the power amplifier device 30 to be compared to determine whether the power amplifier device 30 to be tested has an abnormality, thereby effectively improving the efficiency of testing the power amplifier device 30 and the accuracy of the test results. By providing a control switch 50 connected to the first interface 101, the second interface 102, and the comparison circuit 40 within the listening detection device, and providing a control circuit 60 connected to the control switch 50, the second interface 102, and the comparison circuit 40, the control circuit 60 can be used to control the switch 50 to align the waveforms of the first audio source signal and the second audio source signal, and transmit them to the comparison circuit 40 for comparison. By configuring the comparison circuit 40 with a Schmidt comparator, when comparing the first and second sound source signals, it is determined whether the second sound source signal exceeds the hysteresis range of the Schmidt comparator, thereby determining whether any abnormalities exist in the power amplifier channels of the second sound source signal. By connecting an attenuation circuit 70 between the second interface 102 and the control circuit 60, the second sound source signal can be attenuated, thereby protecting the control circuit 60. By connecting a display unit 80 to the control circuit 60, the analysis results of the control circuit 60 can be displayed, making it easier to identify any abnormal channels of the power amplifier device 30 under test.

[0044] The above description is only an implementation method of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A listening detection device, characterized in that: The listening detection device comprises: A communication circuit, the communication circuit comprising at least a first interface and at least a second interface; the first interface is used to connect to an audio source device; the second interface is used to connect to an amplifier channel of a power amplifier device to be tested; A comparison circuit is connected to the first interface and at least one of the second interfaces respectively; the comparison circuit is configured to compare the audio source signals received by the first interface and the second interface respectively to detect whether each amplifier channel of the power amplifier device to be tested is normal.

2. The listening detection device according to claim 1, characterized in that The first interface is configured to receive a first sound source signal of the sound source device playing the test music, and the second interface is configured to receive a second sound source signal of the test music transmitted by the power amplifier device to be tested; The listening detection device further includes: a control switch, wherein the control switch is respectively connected to the first interface, the second interface, and the comparison circuit; a control circuit connected to the control switch, the second interface, and the comparison circuit; The control switch is configured to be turned on when the control circuit detects the input of the second sound source signal, align the waveforms of the first sound source signal and the second sound source signal and input them into the comparison circuit, and the comparison circuit is configured to compare the first sound source signal and the second sound source signal.

3. The listening detection device according to claim 2, characterized in that The listening detection device also includes: An attenuation circuit is connected to the second interface and the control circuit, and is configured to attenuate and sample the second sound source signal, and input the sampled attenuated signal to the control circuit to turn on the control switch.

4. The listening detection device according to claim 3, characterized in that The attenuation circuit is connected to an interrupt pin of the control circuit. The control circuit receives an interrupt signal generated by the attenuation circuit and controls the control switch to be turned on.

5. The listening detection device according to any one of claims 2 to 4, characterized in that: The listening detection device further includes a display unit connected to the control circuit and configured to display a comparison result of the comparison circuit.

6. The listening detection device according to any one of claims 2 to 4, characterized in that: The listening detection device further includes a third interface, which is connected to the control circuit and configured to be connected to an external processor.

7. The listening detection device according to any one of claims 2 to 4, characterized in that: The control switch is an analog switch.

8. The listening detection device according to any one of claims 1 to 4, characterized in that: The comparison circuit includes a Schmitt comparator.

9. The listening detection device according to any one of claims 1 to 4, characterized in that: The first interface and the second interface include aviation plugs.

10. The listening detection device according to claim 2, characterized in that The first audio source signal received by the first interface and the second audio source signal received by the second interface may come from different or the same audio source devices.

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