A method and system for measuring the sound power level of a sound source in a reverberant tank

Abstract

The application provides a kind of measurement method and system of sound source radiation sound power level in reverberation pool, comprising: according to the preset standard, construct reverberation test system, water microphone array and the sound source to be measured are arranged in reverberation pool, wherein the element spacing of water microphone array is less than or equal to minimum half wavelength;Make the sound source to be measured emit the signal to be measured, collect the complete time domain sound pressure data of signal to be measured;Based on the steady-state time domain sound pressure data of sound signal, the mean square sound pressure level of measuring point in reverberation control area is calculated;Based on fourier transform, the complete time domain sound pressure data of all elements is calculated, the sound energy density variation curve is obtained, the sound energy density variation curve is fitted to obtain reverberation time;The sound field correction amount is calculated by using reverberation time, and the radiation sound power level of the sound source to be measured is obtained according to the sound field correction amount.The application simplifies the experimental process, significantly improves the measurement efficiency, reduces the experimental cost, and provides a new technical approach for the pool quick measurement of sound source radiation sound power level.

Description

Technical Field

[0001] This invention relates to the field of underwater acoustic measurement technology, and in particular to a method and system for measuring the radiated sound power level of a sound source in a reverberant water tank. Background Technology

[0002] Reverberation tanks are crucial experimental measurement devices in underwater acoustics, offering unique advantages in acoustic measurements. Compared to the limitations of anechoic tanks in low-frequency performance and the significant signal fluctuations and high costs commonly encountered in open water measurements, acoustic measurements in reverberation tanks offer advantages such as low background noise and high robustness. In recent years, with the development of underwater acoustic technology, the application of reverberation tanks has become a research hotspot in underwater acoustic engineering. Currently, the method for measuring steady-state radiated sound power of a sound source using the reverberation method in a reverberation tank is mature and has been implemented in engineering. In measuring the steady-state and transient radiated sound energy of underwater sound sources, the reverberation method, as a relatively mature measurement technique, can now achieve accurate measurements within the 100Hz-100kHz frequency band; the specific measurement range is mainly limited by the geometric dimensions of the reverberation tank.

[0003] Current research on measuring the radiated sound power of a sound source in a reverberant water tank is primarily exploratory, based on steady-state reverberant water tank theory. This method requires pre-emitting a steady-state sound signal from a known sound source, using a steady-state noise interruption method, and spatially averaging the data by moving a hydrophone array within the reverberation control zone to calculate the sound field correction. Based on the principle that the correction remains constant within the same water tank, the radiated sound power level of the sound source under test is calculated by measuring the attenuation of the sound energy density within the tank. While reliable, this method suffers from drawbacks such as complex operation procedures, long experimental cycles, and demanding equipment requirements. Summary of the Invention

[0004] This invention provides a method and system for measuring the radiated sound power level of a sound source in a reverberant water tank, which addresses the deficiencies in the prior art, enables the calibration of the sound field in the water tank using the sound source under test, and measures the radiated sound power level of the sound source under test using the reverberation method.

[0005] In a first aspect, the present invention provides a method for measuring the radiated sound power level of a sound source in a reverberant water tank, comprising: A reverberation test system is constructed according to a preset standard. A hydrophone array and the sound source to be tested are arranged in a reverberation pool, wherein the element spacing of the hydrophone array is less than or equal to the minimum half wavelength. The sound source under test emits the signal to be tested, and the complete time-domain sound pressure data of the signal to be tested are collected. Calculate the mean square sound pressure level at measuring points within the reverberation control zone based on steady-state time-domain sound pressure data of the acoustic signal; The complete time-domain sound pressure data of all array elements is calculated based on Fourier transform to obtain the sound energy density change curve, and the reverberation time is obtained by fitting the sound energy density change curve. The sound field correction is calculated using the reverberation time, and the radiated sound power level of the sound source under test is obtained based on the sound field correction.

[0006] According to the present invention, a method for measuring the radiated sound power level of a sound source in a reverberation tank is provided, comprising constructing a reverberation test system based on a preset standard, and arranging a hydrophone array and the sound source to be tested in the reverberation tank, including: The transient sound source to be tested is placed at a distance from the wall of the reverberation pool that is greater than the wavelength of the lowest analysis frequency. Hydrophones are arranged in a linear array and individually on supports throughout the entire space of the reverberation pool, with the spacing between each hydrophone being less than or equal to the minimum half wavelength.

[0007] According to the present invention, a method for measuring the radiated sound power level of a sound source in a reverberant water tank is provided. Based on Fourier transform, the complete time-domain sound pressure data of all array elements are calculated to obtain the sound energy density variation curve, including: Perform a Fourier transform on the time-domain sound pressure data:

[0008] in, It is the first n A hydrophone in time t and f The complex spectrum, It is a window function. For time delay; based on Calculate sound energy density:

[0009] in, It is the first n Time-frequency acoustic energy density of a hydrophone It is the density of water. c It is the speed of sound; right N Spatial averaging of individual hydrophones:

[0010] According to spatial average Plot the curve of sound energy density changing over time in the reverberant water tank.

[0011] According to the present invention, a method for measuring the radiated sound power level of a sound source in a reverberation tank includes fitting the sound energy density variation curve to obtain the reverberation time, comprising: Obtain the initial steady-state sound pressure level of the sound energy density versus time curve, and perform linear fitting between the first sound pressure attenuation range and the second sound pressure attenuation range near the initial steady-state sound pressure level; Calculate the slope of a straight line The reverberation time is obtained as follows:

[0012] in This represents the fitted straight line.

[0013] According to the present invention, a method for measuring the radiated sound power level of a sound source in a reverberation tank, wherein the sound field correction is calculated using the reverberation time, includes: Calculate the sound field correction of the reverberation tank based on the reverberation time. :

[0014] in, The surface area of ​​the pool. The volume of the pool is... For the speed of sound, This refers to the reverberation time.

[0015] According to the present invention, a method for measuring the radiated sound power level of a sound source in a reverberant water tank, wherein the radiated sound power level of the sound source under test is obtained based on the sound field correction, includes: The radiated sound power level can be obtained by adjusting the water tank level.

[0016] in, The mean square sound pressure level is given at all hydrophone measurement points.

[0017] Secondly, the present invention also provides a system for measuring the radiated sound power level of a sound source in a reverberant water tank, comprising: The deployment module is used to construct a reverberation test system according to a preset standard, and to deploy a hydrophone array and the sound source to be tested in a reverberation pool, wherein the element spacing of the hydrophone array is less than or equal to the minimum half wavelength. The acquisition module is used to enable the sound source under test to emit the signal to be tested and to acquire the complete time-domain sound pressure data of the signal to be tested; The calculation module is used to calculate the mean square sound pressure level at the measuring points in the reverberation control area based on the steady-state time-domain sound pressure data of the acoustic signal. The fitting module is used to calculate the complete time-domain sound pressure data of all array elements based on Fourier transform, obtain the sound energy density change curve, and fit the sound energy density change curve to obtain the reverberation time. The measurement module is used to calculate the sound field correction amount using the reverberation time, and to obtain the radiated sound power level of the sound source under test based on the sound field correction amount.

[0018] Thirdly, the present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the method for measuring the radiated sound power level of a sound source in a reverberant water tank as described above.

[0019] Fourthly, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method for measuring the radiated sound power level of a sound source in a reverberant water tank as described in any of the above embodiments.

[0020] The present invention provides a method and system for measuring the radiated sound power level of a sound source in a reverberant water tank. This method uses the sound source under test to calibrate the sound field of the water tank, and then uses the reverberation method to measure the radiated sound power level of the sound source. Compared to the traditional reverberant water tank method, which requires prior calibration of the water tank sound field using a known sound source, this method does not require prior calibration. Instead, it directly measures the sound source under test in the water tank. Using the time-domain sound pressure data of the measured sound signal, the reverberation time of the water tank sound field and the radiated sound power level of the sound source under test are calculated, significantly improving the efficiency of the water tank experiment. This measurement method has advantages such as low cost and high efficiency, achieving integrated measurement and calibration, and simplifying the experimental process. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a flowchart illustrating the method for measuring the radiated sound power level of a sound source in a reverberant water tank provided by the present invention. Figure 2 This is a schematic diagram of the measurement principle of unknown sound sources provided by the present invention; Figure 3 This is a schematic diagram of the reverberation tank testing system provided by the present invention; Figure 4 This is a simulation diagram of the reverberation tank provided by the present invention; Figure 5 This is a schematic diagram of the layout of simulation measuring points in the reverberation pool provided by the present invention; Figure 6 This is a waveform diagram of an unknown sound source in the free field time domain provided by the present invention; Figure 7 This invention provides time-domain waveform diagrams of unknown sound sources at various measuring points in a reverberation tank. Figure 8 This is the average sound energy attenuation curve in a non-anechoic water tank provided by the present invention; Figure 9 This is a schematic diagram of calculating the reverberation time based on the sound energy attenuation curve in a non-anechoic water tank provided by the present invention; Figure 10 This is a schematic diagram of the structure of the measurement system for the radiated sound power level of a sound source in a reverberant water tank provided by the present invention; Figure 11 This is a schematic diagram of the structure of the electronic device provided by the present invention. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0024] To address the shortcomings of existing technologies, this invention proposes a method for measuring the radiated sound power level of a sound source in a reverberant water tank. This method, which uses the signal emitted by the unknown sound source itself to measure the reverberation time for sound field calibration in the reverberant water tank, offers advantages in speed and efficiency, and has significant engineering application value. This method not only simplifies the experimental procedure and significantly improves measurement efficiency but also reduces experimental costs, providing a new technical approach for the rapid measurement of the radiated sound power level of a sound source in a water tank.

[0025] Figure 1 This is a flowchart illustrating the method for measuring the radiated sound power level of a sound source in a reverberant water tank, as provided in an embodiment of the present invention. Figure 1 As shown, it includes: Step 100: Construct a reverberation test system according to preset standards, and set up a hydrophone array and the sound source to be tested in a reverberation pool, wherein the element spacing of the hydrophone array is less than or equal to the minimum half wavelength. Step 200: Make the sound source under test emit the signal to be tested, and collect the complete time-domain sound pressure data of the signal to be tested; Step 300: Calculate the mean square sound pressure level at the measuring points within the reverberation control zone based on the steady-state time-domain sound pressure data of the acoustic signal; Step 400: Calculate the complete time-domain sound pressure data of all array elements based on Fourier transform to obtain the sound energy density change curve, and fit the sound energy density change curve to obtain the reverberation time; Step 500: Calculate the sound field correction amount using the reverberation time, and obtain the radiated sound power level of the sound source under test based on the sound field correction amount.

[0026] Specifically, such as Figure 2 The basic principle diagram shown illustrates that this embodiment of the invention constructs a reverberation testing system based on the group standard for measuring the radiated sound power of underwater sound sources in a reverberant sound field. The sound source under test is placed in a specific location, and a hydrophone array is deployed in a reverberation tank, with the spacing between array elements not exceeding the minimum half-wavelength. The sound source under test emits the signal to be measured, and the complete time-domain sound pressure data of this signal is collected. Based on the steady-state time-domain sound pressure data of the sound signal, the mean square sound pressure level at the measuring points within the reverberation control zone is calculated. The sound energy density variation curve is calculated based on the time-domain sound pressure data of all array elements using Fourier transform (FFT), and the reverberation time is obtained by fitting the attenuation portion of the sound energy density curve. The radiated sound power level of the sound source is calculated by combining the mean square sound pressure level with the sound field correction.

[0027] It should be noted that the method for measuring the radiation characteristics of sound sources in enclosed spaces was initially based on air reverberation chambers. Studies have found that when liquids and solids couple, the low-frequency reverberation time in a reverberation tank is significantly shorter than in an air reverberation chamber, and the average sound pressure level fluctuation in the water tank is greater, indicating poor uniformity of the low-frequency sound field in water. Professor Li Qi was the first to apply the reverberation method to the measurement of radiated sound power in complex underwater structures. The core of this method is to calculate the frequency domain correction by measuring the reverberation time for water tank calibration.

[0028] Underwater acoustic signals are characterized by short duration, concentrated energy, and non-stationarity, and mainly originate from active sonar, objects entering the water, underwater vehicle maneuvers, explosions, natural phenomena, and biological activities. These signals have become important indicators for the detection of acoustic characteristics of submersibles, and their accurate measurement has significant engineering value for target identification and sound field research. Existing research methods mainly focus on signal detection, and commonly used algorithms include: (1) Hilbert-Huang transform; (2) Fourier transform; (3) Power-Low noise discrimination technology. Traditional measurement uses the free-field measurement method, which can infer the characteristics of the sound source through single-point sound pressure under ideal conditions. However, there are two limitations in practical applications: (1) the low-frequency performance of anechoic pools is limited (the sound absorption effect decreases when the frequency is below the lower limit of operation); (2) large-volume sound sources will reduce the accuracy of the free field of the pool. When the radiation state of the sound source in a non-anechoic pool is close to that of free space, it can still serve as an effective acoustic signal research environment. Measurement under this condition provides a practical solution for the study of acoustic characteristics in complex environments.

[0029] Reverberation time is a key indicator for measuring the rate of acoustic energy decay in a non-anechoic water tank. It is defined as the time required for the acoustic energy density to decay by 60 dB. In practical measurements, Fourier transform (FFT) is typically used to plot the acoustic energy density decay curve, and the slope of this curve is used to calculate the T60 value. This is because the signal-to-noise ratio is often insufficient to directly measure the complete 60 dB decay. During STFT processing, the window function length is set to 20 ms, and the overlap rate is 95% to balance time resolution and spectral stability.

[0030] Among them, such as Figure 3 As shown, an array of hydrophones is placed in a reverberation tank to simulate the reverberation tank. Figure 4 As shown; the sound source to be tested is placed at a distance from the pool wall greater than the wavelength of the lowest analysis frequency; hydrophones are arranged in a linear array and individually on supports throughout the entire space of the pool, with the maximum spacing equal to the minimum half wavelength. The arrangement of each simulated measurement point is as follows. Figure 5 As shown.

[0031] Based on this, the sound source under test emits a sound signal, and the sound field correction of the reverberation tank is calculated, including: Fourier transform was performed on the time-domain sound pressure data of all collected hydrophones:

[0032] in, It is the first n A hydrophone in time t and f The complex spectrum, It is a window function. For time delay; use Calculate sound energy density:

[0033] in, It is the first n Time-frequency acoustic energy density of a hydrophone It is the density of water. c It is the speed of sound; right N Spatial averaging of individual hydrophones:

[0034] According to spatial average Plot the curve of sound energy density changing over time in the reverberant water tank.

[0035] Find the initial steady-state sound pressure level B1 in the attenuation portion of the curve, fit a straight line between B1-5dB and B1-25dB, and calculate the slope of the straight line. p(1) The reverberation time is ,in This represents the fitted straight line.

[0036] Once the reverberation time is obtained, it can be used to calculate the sound field correction amount for the reverberation tank. :

[0037] in, The surface area of ​​the pool. The volume of the pool is... For the speed of sound, This refers to the reverberation time.

[0038] The radiated sound power level can be corrected by adjusting the water tank level.

[0039] in, The mean square sound pressure level is given at all hydrophone measurement points.

[0040] The following uses a specific signal as an example to illustrate the implementation scheme of the present invention.

[0041] In this embodiment, an unknown sound source emits a 200Hz sound signal, with a window function length of 20ms and an overlap rate of 95%. All hydrophone signals are simultaneously acquired in a reverberation tank. A 3-second data segment containing the complete pulse and decay process is included, where the free-field time-domain waveform of the unknown sound source is shown below. Figure 6 As shown, the time-domain waveforms of the unknown sound source at various measuring points in the reverberation tank are as follows: Figure 7 As shown, Fourier transform is performed on the signals collected by each hydrophone to obtain the instantaneous sound energy density. The instantaneous sound energy density of all hydrophones in the reverberation pool is spatially averaged, which significantly improves the smoothness of the sound energy attenuation curve and thus improves the accuracy of reverberation time estimation.

[0042] Plot the curve of sound energy density decaying over time for a single hydrophone in a water tank, such as... Figure 8 As shown in the attenuation curve L(t) Find the initial steady-state sound pressure level B1 on the attenuation curve (the initial steady-state sound pressure level after the pulse ends); extract the attenuation range: from B1-5dB to B1-65dB, i.e., the attenuation range of 60dB, where B1 is... Figure 8 The peak value of the curve; perform linear regression on the data in this interval to fit a straight line, such as... Figure 9 As shown, calculate Figure 9 slope of the middle line p(1) The reverberation time is =0.18s. In actual measurements, to ensure the stability of the experimental method and the accuracy of the data, the relative positions of the hydrophone and the sound source need to be moved and the above steps repeated, and the final average reverberation time is 0.18s. The water tank sound field correction amount is calculated using the reverberation time. The simulation result for the non-anechoic water tank is 147.72 dB, and the simulation result for the free field is 144.77 dB. This shows that the error between the measured value obtained by this method and the total sound level obtained from the anechoic water tank is less than 3 dB. Table 1 shows the calculated total sound level of the unknown sound source in the non-anechoic water tank.

[0043] Table 1

[0044] The following describes the measurement system for the radiated sound power level of a sound source in a reverberant water tank provided by the present invention. The measurement system for the radiated sound power level of a sound source in a reverberant water tank described below can be referred to in correspondence with the measurement method for the radiated sound power level of a sound source in a reverberant water tank described above.

[0045] Figure 10 This is a schematic diagram of the structure of the sound source radiated sound power level measurement system in a reverberant water tank provided in an embodiment of the present invention, as shown below. Figure 10 As shown, it includes: a deployment module 1001, a data acquisition module 1002, a calculation module 1003, a fitting module 1004, and a measurement module 1005, wherein: The deployment module 1001 is used to construct a reverberation test system according to a preset standard, and to deploy a hydrophone array and a sound source to be tested in a reverberation pool, wherein the element spacing of the hydrophone array is less than or equal to the minimum half wavelength; the acquisition module 1002 is used to make the sound source to be tested emit a signal to be tested, and to acquire the complete time-domain sound pressure data of the signal to be tested; the calculation module 1003 is used to calculate the mean square sound pressure level of the measuring points in the reverberation control area based on the steady-state time-domain sound pressure data of the sound signal; the fitting module 1004 is used to calculate the complete time-domain sound pressure data of all array elements based on Fourier transform, to obtain the sound energy density change curve, and to fit the sound energy density change curve to obtain the reverberation time; the measurement module 1005 is used to calculate the sound field correction amount using the reverberation time, and to obtain the radiated sound power level of the sound source to be tested based on the sound field correction amount.

[0046] Figure 11 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 11As shown, the electronic device may include: a processor 1110, a communications interface 1120, a memory 1130, and a communications bus 1140, wherein the processor 1110, the communications interface 1120, and the memory 1130 communicate with each other through the communications bus 1140. The processor 1110 can call logic instructions in the memory 1130 to execute a method for measuring the radiated sound power level of a sound source in a reverberation tank. This method includes: constructing a reverberation test system according to a preset standard; arranging a hydrophone array and a sound source to be tested in the reverberation tank, wherein the element spacing of the hydrophone array is less than or equal to the minimum half-wavelength; causing the sound source to emit a test signal and acquiring complete time-domain sound pressure data of the test signal; calculating the mean square sound pressure level at measurement points within the reverberation control zone based on the steady-state time-domain sound pressure data of the sound signal; calculating the complete time-domain sound pressure data of all array elements based on Fourier transform to obtain a sound energy density variation curve; fitting the sound energy density variation curve to obtain the reverberation time; calculating a sound field correction using the reverberation time; and obtaining the radiated sound power level of the sound source to be tested based on the sound field correction.

[0047] Furthermore, the logical instructions in the aforementioned memory 1130 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, essentially, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0048] On the other hand, the present invention also provides a computer program product, which includes a computer program that can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the measurement method for the radiated sound power level of a sound source in a reverberation tank provided by the above methods. The method includes: constructing a reverberation test system according to a preset standard; arranging a hydrophone array and a sound source to be tested in a reverberation tank, wherein the element spacing of the hydrophone array is less than or equal to the minimum half wavelength; causing the sound source to emit a signal to be tested; acquiring complete time-domain sound pressure data of the signal to be tested; calculating the mean square sound pressure level of the measuring points in the reverberation control zone based on the steady-state time-domain sound pressure data of the sound signal; calculating the complete time-domain sound pressure data of all array elements based on Fourier transform to obtain a sound energy density change curve; fitting the sound energy density change curve to obtain the reverberation time; calculating a sound field correction amount using the reverberation time; and obtaining the radiated sound power level of the sound source to be tested based on the sound field correction amount.

[0049] In another aspect, the present invention also provides a non-transitory computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements a method for measuring the radiated sound power level of a sound source in a reverberant pool provided by the methods described above. This method includes: constructing a reverberation test system according to a preset standard; arranging a hydrophone array and a sound source to be tested in a reverberant pool, wherein the element spacing of the hydrophone array is less than or equal to the minimum half-wavelength; causing the sound source to emit a test signal and acquiring complete time-domain sound pressure data of the test signal; calculating the mean square sound pressure level of the measuring points within the reverberation control zone based on the steady-state time-domain sound pressure data of the sound signal; calculating the complete time-domain sound pressure data of all array elements based on Fourier transform to obtain a sound energy density variation curve; fitting the sound energy density variation curve to obtain the reverberation time; calculating a sound field correction using the reverberation time; and obtaining the radiated sound power level of the sound source to be tested based on the sound field correction.

[0050] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0051] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for measuring the radiated sound power level of a sound source in a reverberant water tank, characterized in that, include: A reverberation test system is constructed according to a preset standard. A hydrophone array and the sound source to be tested are arranged in a reverberation pool, wherein the element spacing of the hydrophone array is less than or equal to the minimum half wavelength. The sound source under test emits the signal to be tested, and the complete time-domain sound pressure data of the signal to be tested are collected. Calculate the mean square sound pressure level at measuring points within the reverberation control zone based on steady-state time-domain sound pressure data of the acoustic signal; The complete time-domain sound pressure data of all array elements is calculated based on Fourier transform to obtain the sound energy density change curve, and the reverberation time is obtained by fitting the sound energy density change curve. The sound field correction is calculated using the reverberation time, and the radiated sound power level of the sound source under test is obtained based on the sound field correction.

2. The method for measuring the radiated sound power level of a sound source in a reverberant water tank according to claim 1, characterized in that, A reverberation testing system was constructed according to preset standards. A hydrophone array and the sound source to be tested were placed in a reverberation tank, including: The sound source to be tested is placed in the reverberation tank at a distance from the tank wall greater than the wavelength of the lowest analysis frequency. Hydrophones are arranged in a linear array and individually on supports throughout the entire space of the reverberation pool, with the spacing between each hydrophone being less than or equal to the minimum half wavelength.

3. The method for measuring the radiated sound power level of a sound source in a reverberant water tank according to claim 1, characterized in that, Based on the Fourier transform, the complete time-domain sound pressure data of all array elements were calculated, and the sound energy density variation curves were obtained, including: Perform a Fourier transform on the time-domain sound pressure data: in, It is the first n A hydrophone in time t and f The complex spectrum, It is a window function. For time delay; based on Calculate sound energy density: in, It is the first n Time-frequency acoustic energy density of a hydrophone It is the density of water. c It is the speed of sound; right N Spatial averaging of individual hydrophones: According to spatial average Plot the curve of sound energy density changing over time in the reverberant water tank.

4. The method for measuring the radiated sound power level of a sound source in a reverberant water tank according to claim 3, characterized in that, The reverberation time is obtained by fitting the sound energy density change curve, including: Obtain the initial steady-state sound pressure level of the sound energy density versus time curve, and perform linear fitting between the first sound pressure attenuation range and the second sound pressure attenuation range near the initial steady-state sound pressure level; Calculate the slope of a straight line The reverberation time is obtained as follows: in This represents the fitted straight line.

5. The method for measuring the radiated sound power level of a sound source in a reverberant water tank according to claim 4, characterized in that, The sound field correction is calculated using the reverberation time, including: Calculate the sound field correction of the reverberation tank based on the reverberation time. : in, The surface area of ​​the pool. The volume of the pool is... For the speed of sound, This refers to the reverberation time.

6. The method for measuring the radiated sound power level of a sound source in a reverberant water tank according to claim 5, characterized in that, Obtaining the radiated sound power level of the sound source under test based on the sound field correction includes: The radiated sound power level can be obtained by adjusting the water tank level. in, The mean square sound pressure level is given at all hydrophone measurement points.

7. A system for measuring the radiated sound power level of a sound source in a reverberant water tank, characterized in that, include: The deployment module is used to construct a reverberation test system according to a preset standard, and to deploy a hydrophone array and the sound source to be tested in a reverberation pool, wherein the element spacing of the hydrophone array is less than or equal to the minimum half wavelength. The acquisition module is used to enable the sound source under test to emit the signal to be tested and to acquire the complete time-domain sound pressure data of the signal to be tested; The calculation module is used to calculate the mean square sound pressure level at the measuring points in the reverberation control area based on the steady-state time-domain sound pressure data of the acoustic signal. The fitting module is used to calculate the complete time-domain sound pressure data of all array elements based on Fourier transform, obtain the sound energy density change curve, and fit the sound energy density change curve to obtain the reverberation time. The measurement module is used to calculate the sound field correction amount using the reverberation time, and to obtain the radiated sound power level of the sound source under test based on the sound field correction amount.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the method for measuring the radiated sound power level of a sound source in a reverberant water tank as described in any one of claims 1 to 6.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the method for measuring the radiated sound power level of a sound source in a reverberant water tank as described in any one of claims 1 to 6.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the method for measuring the radiated sound power level of a sound source in a reverberant water tank as described in any one of claims 1 to 6.

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