Lavalier microphone audio amplification system

Abstract

The present application relates to the field of audio technology, especially to a hanging microphone audio amplification system, comprising: a hanging microphone for converting sound waves into electrical signals; an audio detection module for obtaining a first-level audio feature parameter, comprising a vibration sensor; an audio data processing module for outputting a second-level audio feature parameter by analyzing and calculating the first-level audio feature parameter; a central control module for initially adjusting the rotation speed of the hanging microphone according to the signal-to-noise ratio of the audio, or initially adjusting the maximum rotation angle of the hanging microphone according to the vibration frequency of the hanging microphone, and secondarily adjusting the rotation speed of the hanging microphone according to the variance of the fluctuation amplitude of the audio, and secondarily adjusting the maximum rotation angle of the hanging microphone according to the difference amount of the volume; the present application realizes the improvement of the collection effectiveness of the hanging microphone audio.

Description

Technical Field

[0001] This invention relates to the field of audio technology, and more particularly to a suspended microphone audio amplification system. Background Technology

[0002] Hanging microphone audio amplification equipment is used in educational settings, conference broadcasting, karaoke, and other venues. Users of this equipment can process and amplify audio sources, ensuring optimized sound quality while amplifying the sound through speaker equipment. Currently, the equipment picks up audio sources through microphones and linear stereo input, and the amplified sound is connected to speakers via binding posts.

[0003] Chinese Patent Publication No. CN218788837U discloses a hanging microphone and audio processing system, including a housing, a microphone pickup module, and a circuit board. The microphone pickup module and the circuit board are both housed within the housing. The microphone pickup module includes at least one microphone, which is communicatively connected to the circuit board. The circuit board has a communication interface and a cascading interface. The communication interface is used to connect to an external mobile device, and the cascading interface is used to connect in series with other hanging microphones. It is evident that the hanging microphone and audio processing system suffers from the following problem: the inaccurate determination of the accuracy of sound pickup, reflected by the signal-to-noise ratio of the audio captured by the hanging microphone, leads to a reduction in audio effectiveness. Summary of the Invention

[0004] To address this issue, the present invention provides a suspended microphone audio amplification system to overcome the problem in the prior art where the inaccurate determination of the accuracy of sound reception reflected by the signal-to-noise ratio of the audio collected by the suspended microphone leads to a reduction in audio effectiveness.

[0005] To achieve the above objectives, the present invention provides a suspended microphone audio amplification system, comprising: a suspended microphone for converting sound waves into electrical signals; an audio detection module connected to the suspended microphone for acquiring primary audio characteristic parameters, including a vibration sensor connected to the suspended microphone for detecting the vibration frequency of the suspended microphone, wherein the primary audio characteristic parameters include: the signal-to-noise ratio of the audio, the amplitude of audio fluctuation, the volume, and the vibration frequency of the suspended microphone; and an audio data processing module connected to the audio detection module for analyzing and calculating the primary audio characteristic parameters to output secondary audio characteristic parameters. The secondary audio characteristic parameters include: the variance of the audio fluctuation amplitude and the difference in volume; the central control module, which is connected to the suspended microphone, the audio detection module and the audio data processing module respectively, is used to initially adjust the rotation speed of the suspended microphone when the accuracy of the sound reception is below the allowable range based on the signal-to-noise ratio of the audio, or to initially adjust the maximum rotation angle of the suspended microphone based on the vibration frequency of the suspended microphone, and to further adjust the rotation speed of the suspended microphone based on the variance of the audio fluctuation amplitude, and to further adjust the maximum rotation angle of the suspended microphone based on the difference in volume.

[0006] Furthermore, the central control module determines whether the accuracy of the sound reception is within the allowable range based on the signal-to-noise ratio of the audio using three methods, among which...

[0007] The first determination method is that the central control module determines that the accuracy of the sound reception is lower than the allowable range under the preset first signal-to-noise ratio condition, initially determines that the stability of the hanging microphone position is lower than the allowable range, and makes a second determination on whether the stability of the hanging microphone position is within the allowable range based on the vibration frequency of the hanging microphone.

[0008] The second determination method is that the central control module determines that the accuracy of the sound reception is lower than the allowable range under the preset second signal-to-noise ratio condition, and adjusts the rotation speed of the hanging microphone to the first corresponding speed by calculating the difference between the signal-to-noise ratio of the audio and the preset first signal-to-noise ratio.

[0009] The third determination method is that the central control module determines that the accuracy of the sound reception is within the allowable range under the preset third signal-to-noise ratio condition;

[0010] Wherein, the preset first signal-to-noise ratio condition is that the signal-to-noise ratio of the audio is less than or equal to the preset first signal-to-noise ratio; the preset second signal-to-noise ratio condition is that the signal-to-noise ratio of the audio is greater than the preset first signal-to-noise ratio and less than or equal to the preset second signal-to-noise ratio; the preset third signal-to-noise ratio condition is that the signal-to-noise ratio of the audio is greater than the preset second signal-to-noise ratio; and the preset first signal-to-noise ratio is less than the preset second signal-to-noise ratio.

[0011] Furthermore, the central control module determines two adjustment methods for the rotation speed of the suspended microphone based on the difference between the audio signal-to-noise ratio and the preset first signal-to-noise ratio under the preset second signal-to-noise ratio condition.

[0012] The first adjustment method is that the central control module adjusts the rotation speed of the suspended microphone to the first speed using a preset first speed adjustment coefficient under a preset first signal-to-noise ratio difference condition.

[0013] The second adjustment method is that the central control module adjusts the rotation speed of the suspended microphone to the second speed under the condition of a preset second signal-to-noise ratio difference;

[0014] The first preset signal-to-noise ratio difference condition is that the difference between the audio signal-to-noise ratio and the preset first signal-to-noise ratio is less than or equal to the preset signal-to-noise ratio difference; the second preset signal-to-noise ratio difference condition is that the difference between the audio signal-to-noise ratio and the preset first signal-to-noise ratio is greater than the preset signal-to-noise ratio difference; and the first preset speed adjustment coefficient is less than the second preset speed adjustment coefficient.

[0015] Furthermore, the central control module employs two secondary determination methods to assess whether the stability of the suspended microphone's position is within the allowable range based on the vibration frequency of the suspended microphone under the preset first signal-to-noise ratio condition. Among these methods,

[0016] The first secondary determination method is that the central control module determines the stability of the hanging microphone position within an allowable range under a preset first frequency condition;

[0017] The second secondary determination method is that the central control module determines that the stability of the hanging microphone position is lower than the allowable range under the preset second frequency condition, and adjusts the maximum rotation angle of the hanging microphone to the first corresponding angle by calculating the difference between the vibration frequency of the hanging microphone and the preset vibration frequency.

[0018] The first preset frequency condition is that the vibration frequency of the suspended microphone is less than or equal to a preset vibration frequency; the second preset frequency condition is that the vibration frequency of the suspended microphone is greater than a preset vibration frequency.

[0019] Furthermore, the central control module, under the preset second frequency condition, determines two adjustment methods for the maximum rotation angle of the suspended microphone based on the difference between the vibration frequency of the suspended microphone and the preset vibration frequency.

[0020] The first angle adjustment method is that the central control module adjusts the maximum rotation angle of the suspended microphone to the first angle using a preset second angle adjustment coefficient under a preset first frequency difference condition.

[0021] The second angle adjustment method is that the central control module adjusts the maximum rotation angle of the suspended microphone to the second angle using a preset first angle adjustment coefficient under the preset second frequency difference condition.

[0022] The first preset frequency difference condition is that the difference between the vibration frequency of the suspended microphone and the preset vibration frequency is less than or equal to the preset vibration frequency difference; the second preset frequency difference condition is that the difference between the vibration frequency of the suspended microphone and the preset vibration frequency is greater than the preset vibration frequency difference; and the first preset angle adjustment coefficient is less than the second preset angle adjustment coefficient.

[0023] Furthermore, the central control module determines whether the sound reception stability is within the allowable range based on the variance of the audio fluctuation amplitude under the first condition using two methods, wherein...

[0024] The first stability determination method is that the central control module determines that the sound reception stability is within the allowable range under a preset first variance condition;

[0025] The second stability determination method is that the central control module determines that the sound reception stability is lower than the allowable range under the preset second variance condition, and adjusts the rotation speed of the hanging microphone to the corresponding speed by calculating the difference between the variance of the audio fluctuation amplitude and the preset variance.

[0026] The first condition is that the central control module completes the initial adjustment of the rotation speed of the hanging microphone; the preset first variance condition is that the variance of the audio fluctuation amplitude is less than or equal to the preset variance; and the preset second variance condition is that the variance of the audio fluctuation amplitude is greater than the preset variance.

[0027] Furthermore, the central control module, under the preset second variance condition, determines two secondary adjustment methods for the rotation speed of the suspended microphone based on the difference between the variance of the audio fluctuation amplitude and the preset variance.

[0028] The first secondary adjustment method is that the central control module adjusts the rotation speed of the suspended machine to the third speed using a preset third speed adjustment coefficient under the condition of a preset first variance difference.

[0029] The second secondary adjustment method is that the central control module adjusts the rotation speed of the hanging machine to the fourth speed using a preset fourth speed adjustment coefficient under the preset second variance difference condition;

[0030] The first preset variance difference condition is that the difference between the variance of the audio fluctuation amplitude and the preset variance is less than or equal to the preset variance difference; the second preset variance difference condition is that the difference between the variance of the audio fluctuation amplitude and the preset variance is greater than the preset variance difference; and the third preset speed adjustment coefficient is less than the fourth preset speed adjustment coefficient.

[0031] Furthermore, the central control module uses two methods to determine whether the comprehensiveness of the radio reception is within the allowable range based on the volume difference under the second condition.

[0032] The first method for determining comprehensiveness is that the central control module determines that the comprehensiveness of the sound reception is within the allowable range under a preset first difference condition;

[0033] The second comprehensiveness determination method is that the central control module determines that the comprehensiveness of the sound reception is lower than the allowable range under the preset second difference amount condition, and adjusts the maximum rotation angle of the hanging microphone to the second corresponding angle by calculating the difference between the volume difference amount and the preset difference amount.

[0034] The second condition is that the central control module completes the initial adjustment of the maximum rotation angle of the hanging microphone; the preset first difference condition is that the volume difference is less than or equal to the preset difference; and the preset second difference condition is that the volume difference is greater than the preset difference.

[0035] Furthermore, the central control module, under the preset two-difference condition, determines two secondary adjustment methods for the maximum rotation angle of the suspended microphone based on the difference between the volume difference and the preset difference.

[0036] The first method of secondary angle adjustment is that the central control module uses a preset third angle adjustment coefficient to adjust the maximum rotation angle of the suspended boom to the third angle under the condition of a preset first difference value.

[0037] The second method of secondary angle adjustment is that the central control module uses a preset fourth angle adjustment coefficient to adjust the maximum rotation angle of the suspended boom to the fourth angle under the condition of a preset second difference value.

[0038] The first preset difference condition is that the difference between the volume difference and the preset difference is less than or equal to the preset difference; the second preset difference condition is that the difference between the volume difference and the preset difference is greater than the preset difference; and the third preset angle adjustment coefficient is less than the fourth preset angle adjustment coefficient.

[0039] Compared with the prior art, the beneficial effects of the present invention are as follows: The system of the present invention, by setting up a suspended microphone, an audio detection module, an audio data processing module, and a central control module, detects audio parameters during the suspended microphone audio amplification process and makes corresponding adjustments to the suspended microphone. The central control module adjusts the rotation speed of the suspended microphone to a first corresponding speed according to the signal-to-noise ratio of the audio, thereby increasing the rotation speed of the suspended microphone and thus improving the reception efficiency of audio emitted by the moving sound source and improving the integrity of the audio signal. Alternatively, it adjusts the maximum rotation angle of the suspended microphone to a first corresponding angle according to the vibration frequency of the suspended microphone, thereby reducing the vibration amplitude of the suspended microphone by decreasing the rotation angle, thereby reducing the noise reception ratio in the audio recorded by the suspended microphone and improving the signal-to-noise ratio of the audio. Furthermore, after increasing the rotation speed of the suspended microphone, the reduced sound reception stability will manifest as increased audio fluctuation amplitude. By further reducing the rotation speed of the suspended microphone, the sound reception stability is improved, thereby improving the effectiveness of suspended microphone audio acquisition.

[0040] Furthermore, the system of the present invention sets a preset first signal-to-noise ratio and a preset second signal-to-noise ratio. The central control module determines whether the accuracy of the audio reception is within the allowable range based on the audio signal-to-noise ratio. Since the audio source is a mobile device, if the moving speed of the suspended microphone and the audio source differs significantly, it will lead to a decrease in the integrity of the audio reception and an increase in the noise ratio. Under the preset second signal-to-noise ratio condition, by setting a preset signal-to-noise ratio difference, a preset first speed adjustment coefficient, and a preset second speed adjustment coefficient, the central control module increases the rotation speed of the suspended microphone, thereby improving the audio reception efficiency and thus increasing the audio signal-to-noise ratio, further improving the effectiveness of the suspended microphone audio acquisition.

[0041] Furthermore, the system of the present invention sets a preset vibration frequency under the preset first signal-to-noise ratio condition. The central control module determines whether the stability of the suspended microphone position is within the allowable range based on the vibration frequency of the suspended microphone. A portion of the noise in the audio originates from the vibration of the suspended microphone. Due to excessive rotation amplitude of the suspended microphone, the vibration frequency of the suspended microphone increases, thereby increasing the proportion of noise in the audio. By setting the vibration frequency difference, a preset first angle adjustment coefficient, and a preset second angle adjustment coefficient, the central control module reduces the maximum rotation angle of the suspended microphone, thereby reducing the frequency of noise generation during the rotation of the suspended microphone, further improving the effectiveness of the suspended microphone audio acquisition. Attached Figure Description

[0042] Figure 1 This is a block diagram of the overall structure of the suspended microphone audio amplification system according to an embodiment of the present invention;

[0043] Figure 2 This is a detailed structural block diagram of the audio detection module of the suspended microphone audio amplification system according to an embodiment of the present invention;

[0044] Figure 3This is a block diagram showing the connection structure between the audio detection module and the central control module of the suspended microphone audio amplification system according to an embodiment of the present invention.

[0045] Figure 4 This is a block diagram showing the connection structure of the audio detection module, the central control module, and the hanging microphone in the suspended microphone audio amplification system according to an embodiment of the present invention. Detailed Implementation

[0046] To make the objectives and advantages of the present invention clearer, the present invention will be further described below with reference to embodiments; it should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention.

[0047] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0048] Please see Figure 1 , Figure 2 , Figure 3 as well as Figure 4 The diagrams shown are, respectively, an overall structural block diagram of the suspended microphone audio amplification system according to an embodiment of the present invention, a specific structural block diagram of the audio detection module, a connection structural block diagram of the audio detection module and the central control module, and a connection structural block diagram of the audio detection module connected to the central control module and the suspended microphone respectively. The present invention provides a suspended microphone audio amplification system, comprising:

[0049] A microphone is used to convert sound waves into electrical signals.

[0050] An audio detection module, connected to the suspended microphone, is used to acquire primary audio characteristic parameters, including a vibration sensor connected to the suspended microphone for detecting the vibration frequency of the suspended microphone. The primary audio characteristic parameters include: the signal-to-noise ratio of the audio, the amplitude of audio fluctuation, the volume, and the vibration frequency of the suspended microphone.

[0051] An audio data processing module, which is connected to the audio detection module, analyzes and calculates the primary audio feature parameters to output secondary audio feature parameters, which include: the variance of the audio fluctuation amplitude and the difference in volume.

[0052] The central control module, which is connected to the suspended microphone, the audio detection module, and the audio data processing module respectively, is used to initially adjust the rotation speed of the suspended microphone when the accuracy of the sound reception is below the allowable range based on the signal-to-noise ratio of the audio; or, to initially adjust the maximum rotation angle of the suspended microphone based on the vibration frequency of the suspended microphone; and to further adjust the rotation speed of the suspended microphone based on the variance of the audio fluctuation amplitude; and to further adjust the maximum rotation angle of the suspended microphone based on the difference in volume.

[0053] Specifically, the suspended microphone audio amplification system also includes:

[0054] A support rod, which is connected to the suspended man and used to support the suspended man;

[0055] A motion motor, connected to the support rod, is used to provide power for the rotation of the suspended machine.

[0056] Specifically, the variance of audio fluctuation amplitude is the variance of the change in audio amplitude. As those skilled in the art will understand, the calculation method of the variance of audio fluctuation amplitude is a conventional technique well known to those skilled in the art, and the specific calculation process of the variance of audio fluctuation amplitude will not be elaborated here.

[0057] The method described in this invention, by setting up a suspended microphone, an audio detection module, an audio data processing module, and a central control module, detects audio parameters during the suspended microphone audio amplification process and makes corresponding adjustments to the suspended microphone. The central control module adjusts the rotation speed of the suspended microphone to a first corresponding speed based on the signal-to-noise ratio of the audio, thereby increasing the reception efficiency of audio emitted by the moving sound source and improving the integrity of the audio signal. Alternatively, it adjusts the maximum rotation angle of the suspended microphone to a first corresponding angle based on the vibration frequency of the suspended microphone, thereby reducing the vibration amplitude of the suspended microphone by decreasing the rotation angle, thus reducing the noise content in the audio recorded by the suspended microphone and improving the signal-to-noise ratio of the audio. Furthermore, after increasing the rotation speed of the suspended microphone, the reduced sound reception stability manifests as increased audio fluctuation amplitude. By further reducing the rotation speed of the suspended microphone, the sound reception stability is improved, thereby enhancing the effectiveness of suspended microphone audio acquisition.

[0058] Please continue reading. Figure 1 As shown, the central control module uses three methods to determine whether the accuracy of the sound reception is within the allowable range based on the signal-to-noise ratio of the audio.

[0059] The first determination method is that the central control module determines that the accuracy of the sound reception is lower than the allowable range under the preset first signal-to-noise ratio condition, initially determines that the stability of the hanging microphone position is lower than the allowable range, and makes a second determination on whether the stability of the hanging microphone position is within the allowable range based on the vibration frequency of the hanging microphone.

[0060] The second determination method is that the central control module determines that the accuracy of the sound reception is lower than the allowable range under the preset second signal-to-noise ratio condition, and adjusts the rotation speed of the hanging microphone to the first corresponding speed by calculating the difference between the signal-to-noise ratio of the audio and the preset first signal-to-noise ratio.

[0061] The third determination method is that the central control module determines that the accuracy of the sound reception is within the allowable range under the preset third signal-to-noise ratio condition;

[0062] The first preset signal-to-noise ratio condition is that the signal-to-noise ratio of the audio is less than or equal to the first preset signal-to-noise ratio; the second preset signal-to-noise ratio condition is that the signal-to-noise ratio of the audio is greater than the first preset signal-to-noise ratio and less than or equal to the second preset signal-to-noise ratio; and the third preset signal-to-noise ratio condition is that the signal-to-noise ratio of the audio is greater than the second preset signal-to-noise ratio.

[0063] Specifically, the signal-to-noise ratio of the audio is denoted as P, the preset first signal-to-noise ratio is denoted as P1, the preset second signal-to-noise ratio is denoted as P2, the difference between the audio signal-to-noise ratio and the preset first signal-to-noise ratio is denoted as ΔP, and ΔP is set to P - P1.

[0064] Please continue reading. Figure 1 As shown, the central control module determines two adjustment methods for the rotation speed of the suspended microphone based on the difference between the audio signal-to-noise ratio and the preset first signal-to-noise ratio under the preset second signal-to-noise ratio condition.

[0065] The first adjustment method is that the central control module adjusts the rotation speed of the suspended microphone to the first speed using a preset first speed adjustment coefficient under a preset first signal-to-noise ratio difference condition.

[0066] The second adjustment method is that the central control module adjusts the rotation speed of the suspended microphone to the second speed under the condition of a preset second signal-to-noise ratio difference;

[0067] The first preset signal-to-noise ratio difference condition is that the difference between the audio signal-to-noise ratio and the preset first signal-to-noise ratio is less than or equal to the preset signal-to-noise ratio difference; the second preset signal-to-noise ratio difference condition is that the difference between the audio signal-to-noise ratio and the preset first signal-to-noise ratio is greater than the preset signal-to-noise ratio difference; and the first preset speed adjustment coefficient is less than the second preset speed adjustment coefficient.

[0068] Specifically, the preset signal-to-noise ratio difference is denoted as ΔP0, the preset first speed adjustment coefficient is denoted as α1, the preset second speed adjustment coefficient is denoted as α2, where 1 < α1 < α2, the rotation speed of the suspended microphone is denoted as V, the adjusted rotation speed of the suspended microphone is denoted as V', and V' is set to V × αi, where αi is the preset i-th speed adjustment coefficient, and i = 1, 2.

[0069] The system described in this invention sets a preset first signal-to-noise ratio (SNR) and a preset second SNR. The central control module determines whether the accuracy of audio reception is within the allowable range based on the audio SNR. Since the audio source is a mobile device, a large difference in the moving speed between the suspended microphone and the audio source will lead to a decrease in the integrity of audio reception and an increase in the noise ratio. Under the preset second SNR condition, by setting a preset SNR difference, a preset first speed adjustment coefficient, and a preset second speed adjustment coefficient, the central control module increases the rotation speed of the suspended microphone, thereby improving the audio reception efficiency and thus increasing the audio SNR, further enhancing the effectiveness of suspended microphone audio acquisition.

[0070] Please continue reading. Figure 1 As shown, the central control module uses two methods to determine whether the stability of the suspended microphone's position is within the allowable range based on the vibration frequency of the suspended microphone under the preset first signal-to-noise ratio condition. Among these methods...

[0071] The first stability determination method is that the central control module determines that the stability of the suspended microphone position is within the allowable range under a preset first frequency condition;

[0072] The second stability determination method is that the central control module determines that the stability of the hanging microphone position is lower than the allowable range under the preset second frequency condition, and adjusts the maximum rotation angle of the hanging microphone to the first corresponding angle by calculating the difference between the vibration frequency of the hanging microphone and the preset vibration frequency.

[0073] The first preset frequency condition is that the vibration frequency of the suspended microphone is less than or equal to a preset vibration frequency; the second preset frequency condition is that the vibration frequency of the suspended microphone is greater than a preset vibration frequency.

[0074] Specifically, the vibration frequency of the suspended microphone is denoted as H, the preset vibration frequency is denoted as H0, the difference between the vibration frequency of the suspended microphone and the preset vibration frequency is denoted as ΔH, and ΔH is set to H-H0.

[0075] Please continue reading. Figure 1 As shown, the central control module determines two adjustment methods for the maximum rotation angle of the suspended microphone based on the difference between the vibration frequency of the suspended microphone and the preset vibration frequency under the preset second frequency condition.

[0076] The first angle adjustment method is that the central control module adjusts the maximum rotation angle of the suspended microphone to the first angle using a preset second angle adjustment coefficient under a preset first frequency difference condition.

[0077] The second angle adjustment method is that the central control module adjusts the maximum rotation angle of the suspended microphone to the second angle using a preset first angle adjustment coefficient under the preset second frequency difference condition.

[0078] The first preset frequency difference condition is that the difference between the vibration frequency of the suspended microphone and the preset vibration frequency is less than or equal to the preset vibration frequency difference; the second preset frequency difference condition is that the difference between the vibration frequency of the suspended microphone and the preset vibration frequency is greater than the preset vibration frequency difference; and the first preset angle adjustment coefficient is less than the second preset angle adjustment coefficient.

[0079] Specifically, the preset vibration frequency difference is denoted as △H0, the preset first angle adjustment coefficient is denoted as β1, the preset second angle adjustment coefficient is denoted as β2, where 0 < β1 < β2 < 1, the maximum rotation angle of the suspended microphone is denoted as A, the maximum rotation angle of the adjusted suspended microphone is denoted as A', and A' is set to A × βj, where βj is the preset j-th angle adjustment coefficient, and j = 1, 2.

[0080] The system of this invention sets a preset vibration frequency under the preset first signal-to-noise ratio condition. The central control module determines whether the stability of the suspended microphone position is within the allowable range based on the vibration frequency of the suspended microphone. A portion of the noise in the audio comes from the vibration of the suspended microphone. Due to excessive rotation amplitude of the suspended microphone, the vibration frequency of the suspended microphone increases, thereby increasing the proportion of noise in the audio. By setting the vibration frequency difference, a preset first angle adjustment coefficient, and a preset second angle adjustment coefficient, the central control module reduces the maximum rotation angle of the suspended microphone, thereby reducing the frequency of noise generation during the rotation of the suspended microphone, and further improving the effectiveness of the suspended microphone audio acquisition.

[0081] Please continue reading. Figure 1 As shown, the central control module uses two secondary determination methods to determine whether the sound reception stability is within the allowable range based on the variance of the audio fluctuation amplitude under the first condition.

[0082] The first secondary determination method is that the central control module determines that the stability of the sound reception is within the allowable range under the preset first variance condition;

[0083] The second secondary determination method is that the central control module determines that the stability of the sound reception is lower than the allowable range under the preset second variance condition, and adjusts the rotation speed of the hanging microphone to the corresponding speed by calculating the difference between the variance of the audio fluctuation amplitude and the preset variance.

[0084] The first condition is that the central control module completes the initial adjustment of the rotation speed of the hanging microphone; the preset first variance condition is that the variance of the audio fluctuation amplitude is less than or equal to the preset variance; and the preset second variance condition is that the variance of the audio fluctuation amplitude is greater than the preset variance.

[0085] Specifically, the variance of the audio fluctuation amplitude is denoted as X, the preset variance is denoted as X0, the difference between the variance of the audio fluctuation amplitude and the preset variance is denoted as ΔX, and ΔX is set to X-X0.

[0086] Please continue reading. Figure 1 As shown, the central control module determines two secondary adjustment methods for the rotation speed of the suspended microphone based on the difference between the variance of the audio fluctuation amplitude and the preset variance under the preset second variance condition.

[0087] The first secondary adjustment method is that the central control module adjusts the rotation speed of the suspended machine to the third speed using a preset third speed adjustment coefficient under the condition of a preset first variance difference.

[0088] The second secondary adjustment method is that the central control module adjusts the rotation speed of the hanging machine to the fourth speed using a preset fourth speed adjustment coefficient under the preset second variance difference condition;

[0089] The first preset variance difference condition is that the difference between the variance of the audio fluctuation amplitude and the preset variance is less than or equal to the preset variance difference; the second preset variance difference condition is that the difference between the variance of the audio fluctuation amplitude and the preset variance is greater than the preset variance difference; and the third preset speed adjustment coefficient is less than the fourth preset speed adjustment coefficient.

[0090] Specifically, the preset variance difference is denoted as △X0, the preset third speed adjustment coefficient is denoted as α3, and the preset fourth speed adjustment coefficient is denoted as α4, where 0 < α3 < α4 < 1. The rotation speed of the suspended machine after the second adjustment is denoted as V”, and V” = V' × (1 - αg) is set, where αg is the preset g-th speed adjustment coefficient, and g = 3, 4 is set.

[0091] Please continue reading. Figure 1 As shown, the central control module uses two methods to determine whether the comprehensiveness of the radio reception is within the allowable range based on the difference in volume under the second condition.

[0092] The first method for determining comprehensiveness is that the central control module determines that the comprehensiveness of the sound reception is within the allowable range under a preset first difference condition;

[0093] The second comprehensiveness determination method is that the central control module determines that the comprehensiveness of the sound reception is lower than the allowable range under the preset second difference amount condition, and adjusts the maximum rotation angle of the hanging microphone to the second corresponding angle by calculating the difference between the volume difference amount and the preset difference amount.

[0094] The second condition is that the central control module completes the initial adjustment of the maximum rotation angle of the hanging microphone; the preset first difference condition is that the volume difference is less than or equal to the preset difference; and the preset second difference condition is that the volume difference is greater than the preset difference.

[0095] Specifically, the volume difference is denoted as C, the preset difference is denoted as C0, the difference between the volume difference and the preset difference is denoted as △C, and △C is set to C-C0.

[0096] Please continue reading. Figure 1 As shown, the central control module determines two secondary adjustment methods for the maximum rotation angle of the microphone based on the difference between the volume difference and the preset difference under the condition of two preset differences.

[0097] The first method of secondary angle adjustment is that the central control module uses a preset third angle adjustment coefficient to adjust the maximum rotation angle of the suspended boom to the third angle under the condition of a preset first difference value.

[0098] The second method of secondary angle adjustment is that the central control module uses a preset fourth angle adjustment coefficient to adjust the maximum rotation angle of the suspended microphone to the fourth angle under the condition of a preset second difference value.

[0099] The first preset difference condition is that the difference between the volume difference and the preset difference is less than or equal to the preset difference; the second preset difference condition is that the difference between the volume difference and the preset difference is greater than the preset difference; and the third preset angle adjustment coefficient is less than the fourth preset angle adjustment coefficient.

[0100] Specifically, the preset difference value is denoted as △C0, the preset third angle adjustment coefficient is denoted as β3, and the preset fourth angle adjustment coefficient is denoted as β4, where 1 < β3 < β4 < e. The maximum rotation angle of the suspended microphone after the second adjustment is denoted as A”, and A” is set to A” = A’ × (1 + l nβk), where βk is the preset k-th angle adjustment coefficient, and k = 3, 4.

[0101] Example 1

[0102] In this embodiment 1, the preset signal-to-noise ratio difference ΔP0 = 0.3, the preset first speed adjustment coefficient α1 = 1.1, the preset second speed adjustment coefficient α2 = 1.2, and the rotational speed of the suspended microphone V = 0.26 rad / s.

[0103] In this embodiment, ΔP = 0.2 is obtained. The central control module determines that ΔP ≤ ΔP0 and uses α1 to adjust the rotation speed of the hanging machine. The adjusted rotation speed of the hanging machine is recorded as V' = 0.26 rad / s × 1.1 = 0.29 rad / s.

[0104] In this embodiment 1, after obtaining ΔP, the central control module uses the corresponding adjustment coefficient to increase the rotation speed of the suspended microphone, thereby improving the efficiency of the suspended microphone in collecting audio and further improving the effectiveness of the suspended microphone audio acquisition.

[0105] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

[0106] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A suspended microphone audio amplification system, characterized in that, include: A microphone is used to convert sound waves into electrical signals. An audio detection module, connected to the suspended microphone, is used to acquire primary audio characteristic parameters, including a vibration sensor connected to the suspended microphone for detecting the vibration frequency of the suspended microphone. The primary audio characteristic parameters include: the signal-to-noise ratio of the audio, the amplitude of audio fluctuation, the volume, and the vibration frequency of the suspended microphone. An audio data processing module, which is connected to the audio detection module, analyzes and calculates the primary audio feature parameters to output secondary audio feature parameters, which include: the variance of the audio fluctuation amplitude and the difference in volume. The central control module, which is connected to the suspended microphone, the audio detection module, and the audio data processing module respectively, is used to initially adjust the rotation speed of the suspended microphone when the accuracy of the sound reception is lower than the allowable range based on the signal-to-noise ratio of the audio; to adjust the rotation speed of the suspended microphone a second time based on the variance of the audio fluctuation amplitude; to adjust the maximum rotation angle of the suspended microphone a first time based on the vibration frequency of the suspended microphone; and to adjust the maximum rotation angle of the suspended microphone a second time based on the difference in volume. The central control module determines that the accuracy of the sound reception is below the allowable range under the preset first signal-to-noise ratio condition, initially determines that the stability of the hanging microphone position is below the allowable range, and makes a secondary determination on whether the stability of the hanging microphone position is within the allowable range based on the vibration frequency of the hanging microphone. The central control module determines that the accuracy of the sound reception is below the allowable range under the preset second signal-to-noise ratio condition, and adjusts the rotation speed of the hanging microphone to the first corresponding speed by calculating the difference between the audio signal-to-noise ratio and the preset first signal-to-noise ratio. The central control module determines that the accuracy of the sound reception is within the allowable range under the preset third signal-to-noise ratio condition; The central control module makes a second determination, under a preset first frequency condition, whether the stability of the suspended microphone position is within the allowable range; The central control module determines for the second time that the stability of the hanging microphone position is below the allowable range under the preset second frequency condition, and adjusts the maximum rotation angle of the hanging microphone to the first corresponding angle by calculating the difference between the vibration frequency of the hanging microphone and the preset vibration frequency. The first preset frequency condition is that the vibration frequency of the hanging microphone is less than or equal to the preset vibration frequency; the second preset frequency condition is that the vibration frequency of the hanging microphone is greater than the preset vibration frequency. The central control module determines whether the sound reception stability is within the allowable range based on the variance of the audio fluctuation amplitude under the first condition. The central control module determines that the stability of the sound reception is within the allowable range under a preset first variance condition; The central control module determines that the stability of the sound reception is lower than the allowable range under the preset second variance condition, and adjusts the rotation speed of the hanging microphone to the second corresponding speed by calculating the difference between the variance of the audio fluctuation amplitude and the preset variance. The first condition is that the central control module completes the initial adjustment of the rotation speed of the hanging microphone; the preset first variance condition is that the variance of the audio fluctuation amplitude is less than or equal to the preset variance; the preset second variance condition is that the variance of the audio fluctuation amplitude is greater than the preset variance. The central control module, under the second condition, determines whether the comprehensiveness of the radio reception is within the allowable range based on the difference in volume. The central control module determines that the comprehensiveness of the sound reception is within the allowable range under the preset first difference condition; The central control module determines that the comprehensiveness of the sound reception is below the allowable range under the preset second difference condition, and adjusts the maximum rotation angle of the hanging microphone to the second corresponding angle by calculating the difference between the volume difference and the preset difference. The second condition is that the central control module completes the initial adjustment of the maximum rotation angle of the hanging microphone; the preset first difference condition is that the volume difference is less than or equal to the preset difference; the preset second difference condition is that the volume difference is greater than the preset difference. The first preset signal-to-noise ratio condition is that the signal-to-noise ratio of the audio is less than or equal to the first preset signal-to-noise ratio; the second preset signal-to-noise ratio condition is that the signal-to-noise ratio of the audio is greater than the first preset signal-to-noise ratio and less than or equal to the second preset signal-to-noise ratio; the third preset signal-to-noise ratio condition is that the signal-to-noise ratio of the audio is greater than the second preset signal-to-noise ratio; and the first preset signal-to-noise ratio is less than the second preset signal-to-noise ratio.

2. The suspended microphone audio amplification system according to claim 1, characterized in that, The central control module determines the rotation speed of the suspended microphone based on the difference between the audio signal-to-noise ratio and the preset first signal-to-noise ratio under the preset second signal-to-noise ratio condition. The first adjustment method is that the central control module adjusts the rotation speed of the suspended microphone to the first speed using a preset first speed adjustment coefficient under a preset first signal-to-noise ratio difference condition. The central control module adjusts the rotation speed of the suspended microphone to the second speed using a preset second speed adjustment coefficient under the condition of a preset second signal-to-noise ratio difference. The first preset signal-to-noise ratio difference condition is that the difference between the audio signal-to-noise ratio and the preset first signal-to-noise ratio is less than or equal to the preset signal-to-noise ratio difference; the second preset signal-to-noise ratio difference condition is that the difference between the audio signal-to-noise ratio and the preset first signal-to-noise ratio is greater than the preset signal-to-noise ratio difference; and the first preset speed adjustment coefficient is less than the second preset speed adjustment coefficient.

3. The suspended microphone audio amplification system according to claim 2, characterized in that, The central control module adjusts the maximum rotation angle of the suspended microphone to the first angle using a preset second angle adjustment coefficient under a preset first frequency difference condition. The central control module adjusts the maximum rotation angle of the suspended microphone to the second angle using a preset first angle adjustment coefficient under a preset second frequency difference condition. The first preset frequency difference condition is that the difference between the vibration frequency of the suspended microphone and the preset vibration frequency is less than or equal to the preset vibration frequency difference; the second preset frequency difference condition is that the difference between the vibration frequency of the suspended microphone and the preset vibration frequency is greater than the preset vibration frequency difference; and the first preset angle adjustment coefficient is less than the second preset angle adjustment coefficient.

4. The suspended microphone audio amplification system according to claim 3, characterized in that, The central control module determines the rotation speed of the suspended microphone based on the difference between the variance of the audio fluctuation amplitude and the preset variance under the preset second variance condition. The central control module adjusts the rotation speed of the suspended machine to the third speed using a preset third speed adjustment coefficient under the preset first variance difference condition; The central control module adjusts the rotation speed of the suspended boom to the fourth speed using a preset fourth speed adjustment coefficient under the preset second variance difference condition. The first preset variance difference condition is that the difference between the variance of the audio fluctuation amplitude and the preset variance is less than or equal to the preset variance difference; the second preset variance difference condition is that the difference between the variance of the audio fluctuation amplitude and the preset variance is greater than the preset variance difference; and the third preset speed adjustment coefficient is less than the fourth preset speed adjustment coefficient.

5. The suspended microphone audio amplification system according to claim 4, characterized in that, The central control module uses a preset third angle adjustment coefficient to adjust the maximum rotation angle of the suspended boom to the third angle a second time under the preset first difference value condition. The central control module uses a preset fourth angle adjustment coefficient to adjust the maximum rotation angle of the suspended microphone to the fourth angle a second time under the preset second difference value condition.

6. The suspended microphone audio amplification system according to claim 5, characterized in that, The first preset difference condition is that the difference between the volume difference and the preset difference is less than or equal to the preset difference; the second preset difference condition is that the difference between the volume difference and the preset difference is greater than the preset difference; and the third preset angle adjustment coefficient is less than the fourth preset angle adjustment coefficient.

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