Method and device for measuring sound insulation

Abstract

Embodiments of this specification provide a method and apparatus for measuring sound insulation. In this method, a voltage measurement value is obtained when a volumetric sound source, located at a first position, emits sound. The voltage measurement value reflects the volumetric acceleration of the volumetric sound source during sound emission. The voltage measurement value is input into a voltage-to-sound conversion model to obtain a converted sound data reference value. The voltage-to-sound conversion model includes at least a voltage-to-sound power conversion process and a sound power-to-sound pressure level conversion process. A sound data reception value is obtained, where the sound data reception value is determined based on sound data collected by a microphone located at a second position when the volumetric sound source emits sound. The first and second positions are separated on either side of a target object to be measured. The sound insulation of the target object to be measured is determined based on the sound data reference value and the corresponding sound data reception value.

Description

Technical Field

[0001] The embodiments of this specification generally relate to the field of acoustic technology, and more particularly, to a method and apparatus for measuring sound insulation. Background Art

[0002] As technology advances, the demands for noise control are becoming increasingly stringent. For example, in home appliances like refrigerators and washing machines, industrial equipment like generators and fans, and the automotive industry, accurate sound insulation measurement is crucial for more detailed sound insulation design optimization.

[0003] In related technologies, sound insulation is typically calculated by comparing the reference sound value emitted by a standard sound source with the received test sound value. However, since the volume sound source typically used as the standard sound source is susceptible to fluctuations in test environment factors such as temperature, humidity, and air pressure, as well as changes in internal factors such as self-heating and component aging and wear over time, the sound characteristics of the volume sound source can be affected. This can lead to significant differences in key indicators such as loudness between each sound emitted by the volume sound source. In this case, since it is difficult to determine the actual sound intensity of each sound emitted by the volume sound source, if the nominal value is still used for calculation, the calculated sound insulation value will deviate significantly from the actual value, thus failing to accurately reflect the true sound insulation performance of the target object under test. Therefore, a method for more accurate sound insulation measurement is needed. Summary of the Invention

[0004] In view of the foregoing, embodiments of this specification provide a method and apparatus for measuring sound insulation. This sound insulation measurement scheme directly measures a voltage value reflecting the volumetric acceleration of a volumetric sound source during sound emission, and obtains a sound data reception value determined based on sound data received by a microphone positioned on the other side of a measured object (e.g., a vehicle). Using a pre-established voltage-to-sound conversion model, which includes at least voltage-to-sound power conversion and sound power-to-sound pressure level conversion, the voltage value is converted into a sound measurement value corresponding to the actual sound emission of the volumetric sound source. The sound insulation of the measured object (e.g., a vehicle) is then determined by comparing the sound measurement value with the sound data reception value. This method converts the direct measurement of the sound emission of a volumetric sound source into an indirect estimation of the actual sound emission characteristics through voltage. If the voltage-to-sound conversion model is effective, it can more accurately and quickly reflect the actual sound emission of the volumetric sound source, thereby improving the accuracy of sound insulation measurement.

[0005] According to one aspect of an embodiment of the present specification, a method for measuring sound insulation is provided, comprising: obtaining a voltage measurement value of a volume sound source arranged at a first position when emitting sound, wherein the voltage measurement value is used to reflect the volume acceleration of the volume sound source when emitting sound; inputting the voltage measurement value into a voltage-to-sound conversion model to obtain a converted sound data reference value, wherein the voltage-to-sound conversion model includes at least a voltage-to-sound power conversion process and a sound power-to-sound pressure level conversion process; obtaining a sound data reception value, wherein the sound data reception value is determined based on sound data collected by a microphone arranged at a second position when the volume sound source emits sound, the first position and the second position being separated on either side of an object to be measured; and determining the sound insulation of the object to be measured based on the sound data reference value and the corresponding sound data reception value.

[0006] According to another aspect of the embodiments of this specification, an apparatus for measuring sound insulation is provided, comprising: a voltage acquisition unit configured to obtain a voltage measurement value of a volume sound source arranged at a first position when emitting sound, wherein the voltage measurement value is used to reflect the volume acceleration of the volume sound source when emitting sound; a sound data acquisition unit configured to obtain a sound data reception value, wherein the sound data reception value is determined based on sound data collected by a microphone arranged at a second position when the volume sound source emits sound, wherein the first position and the second position are separated from each other on either side of an object to be measured; a voltage-to-sound conversion unit configured to input the voltage measurement value into a voltage-to-sound conversion model to obtain a converted sound data reference value, wherein the voltage-to-sound conversion model includes at least a voltage-to-sound power conversion process and a sound power-to-sound pressure level conversion process; and a sound insulation determination unit configured to determine the sound insulation of the object to be measured based on the sound data reference value and the corresponding sound data reception value.

[0007] According to another aspect of the embodiments of this specification, an electronic device is provided, comprising: at least one processor, a memory coupled to the at least one processor, and a computer program stored in the memory, wherein the at least one processor executes the computer program to implement the method for measuring sound insulation as described above.

[0008] According to another aspect of the embodiments of this specification, a computer program product is provided, including a computer program, which implements the method for measuring sound insulation as described above when executed by a processor.

[0009] According to another aspect of the embodiments of the present specification, a method for measuring vehicle sound insulation is provided, comprising: measuring a voltage value of a volume sound source disposed in an area of a human ear within a cockpit of a target vehicle when the volume sound source emits sound, wherein the voltage measurement value reflects the volume acceleration of the volume sound source when emitting sound; collecting sound data using a plurality of microphones disposed at different locations in an area where an onboard power unit is located; inputting at least the measured voltage value into a voltage-to-sound conversion model to obtain a converted sound data reference value, wherein the voltage-to-sound conversion model includes at least a voltage-to-sound power conversion process and a sound power-to-sound pressure level conversion process; converting the sound data into a sound data received value corresponding to the sound data reference value; and determining the sound insulation of the target vehicle based on the sound data reference value and the corresponding sound data received value.

[0010] According to another aspect of the embodiments of the present specification, a system for measuring vehicle sound insulation is provided, comprising: a volume sound source; a voltage meter; multiple microphones; and a processor configured to control the volume sound source to emit sound; control the voltage meter to measure a voltage value of the volume sound source when emitting sound, wherein the voltage measurement value is used to reflect the volume acceleration of the volume sound source when emitting sound; obtain sound data collected by the multiple microphones when the volume sound source emits sound; input at least the voltage value into a voltage-to-sound conversion model to obtain a converted sound data reference value, wherein the voltage-to-sound conversion model includes at least a voltage-to-sound power conversion process and a sound power-to-sound pressure level conversion process; convert the sound data into a sound data received value corresponding to the sound data reference value; and determine the sound insulation of the vehicle to be measured based on the sound data reference value and the corresponding sound data received value. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] A further understanding of the nature and advantages of the present disclosure may be achieved by referring to the following drawings, in which similar components or features may have the same reference numerals.

[0012] Figure 1 An exemplary scenario of a method and apparatus for measuring sound insulation according to an embodiment of this specification is shown.

[0013] Figure 2 A flowchart illustrating an example of a method for measuring sound insulation according to an embodiment of the present specification.

[0014] Figure 3A and Figure 3B A schematic diagram illustrating an example of a first position and a second position according to an embodiment of the present specification.

[0015] Figure 4A flowchart showing an example of a conversion process of a sound data reference value according to an embodiment of the present specification.

[0016] Figure 5 A flowchart illustrating another example of a method for measuring sound insulation according to an embodiment of this specification is shown.

[0017] Figure 6 A flowchart showing an example of a method for measuring vehicle sound insulation according to an embodiment of the present specification.

[0018] Figure 7 A flowchart illustrating yet another example of a method for measuring vehicle sound insulation according to an embodiment of the present specification.

[0019] Figure 8 A block diagram showing an example of a device for measuring sound insulation according to an embodiment of this specification.

[0020] Figure 9 A block diagram illustrating an example of a system for measuring vehicle sound insulation according to an embodiment of the present specification.

[0021] Figure 10 A block diagram showing one example of an electronic device according to an embodiment of this specification. DETAILED DESCRIPTION

[0022] The subject matter described herein will be discussed below with reference to example embodiments. It should be understood that the discussion of these embodiments is intended only to enable those skilled in the art to better understand and implement the subject matter described herein, and is not intended to limit the scope of protection, applicability, or examples set forth in the claims. The functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the embodiments of this specification. Various processes or components may be omitted, substituted, or added to the various examples as needed. In addition, features described in some examples may also be combined in other examples.

[0023] As used herein, the term "including" and its variations are open terms meaning "including but not limited to". The term "based on" means "based at least in part on". The terms "one embodiment" and "an embodiment" mean "at least one embodiment". The term "another embodiment" means "at least one other embodiment". The terms "first", "second", etc. may refer to different or the same objects. Other definitions may be included below, whether explicit or implicit. Unless the context clearly indicates otherwise, the definition of a term is consistent throughout the specification.

[0024] Currently, some methods incorporate a pre-test mechanism. Prior to each test, the noise level of the free-flowing volumetric sound source is monitored. The measured noise level is then compared with a pre-set standard value, serving as a basis for adjusting or judging the effectiveness of subsequent tests. However, these methods only partially account for the instability of the volumetric sound source. Even if the noise level of the free-flowing volumetric sound source is measured, it is difficult to accurately estimate the actual error when the actual test scenario does not meet uniform field conditions. Moreover, when each test cycle includes multiple tests (e.g., at least 20), the pre-determined adjustment value does not reflect the impact of the dynamic performance degradation of the volumetric sound source under continuous testing conditions. If the adjustment value needs to be determined before each test, the workload and testing costs will be significantly increased. Other methods directly detect the actual sound emission of the volumetric sound source. However, these methods are not suitable for scenarios where the target object has good sound insulation performance. For example, to meet the signal-to-noise ratio requirement (at least 15dB) based on the background sound level in a semi-anechoic chamber (20dB), the microphone outside the vehicle must receive a volume of at least 35dB. Since the sound insulation of ordinary vehicles is at least 40dB, the volume of the volumetric sound source in the cockpit must reach at least 75dB. However, it is currently difficult to accurately measure such a large volume directly using a microphone.

[0025] In light of this, embodiments of this specification propose a method for measuring sound insulation. This method directly measures the voltage of a volumetric sound source during sound emission and obtains a sound data reception value determined based on sound data received by a microphone located on the other side of the measured object (e.g., a vehicle). Using a pre-established voltage-to-sound conversion model, the voltage value is converted into a sound measurement value of the volumetric sound source during actual sound emission. The sound insulation of the measured object (e.g., a vehicle) is then determined by comparing the sound measurement value with the sound data reception value. This method converts the direct measurement of the sound emission of the volumetric sound source into an indirect estimation of the actual sound emission characteristics through voltage. If the voltage-to-sound conversion model is effective, it can more accurately and quickly reflect the actual sound emission of the volumetric sound source, thereby improving the accuracy of sound insulation measurement.

[0026] The flowcharts used in this specification illustrate operations implemented by systems according to some embodiments of the present specification. It should be clearly understood that the operations of the flowcharts may not be implemented in sequence. Rather, the operations may be implemented in reverse order or simultaneously. Furthermore, one or more additional operations may be added to the flowcharts. One or more operations may be removed from the flowcharts.

[0027] The method and device for measuring sound insulation according to the embodiments of this specification will be described in detail below with reference to the accompanying drawings.

[0028] Figure 1An exemplary scenario 100 of a method and apparatus for measuring sound insulation according to an embodiment of this specification is shown.

[0029] like Figure 1 As shown, the method and apparatus for measuring sound insulation according to the embodiments of this specification can be applied to automobile sound insulation measurement. For example, in a test site (e.g., a semi-anechoic chamber), a volume sound source and a microphone can be placed at a first location and a second location, respectively. In some examples, the first location and the second location can be located inside and outside the vehicle's cockpit, respectively. For example, the first location can be between the front seats; the second location can be near the engine. Another example is the first location can be near the front wheels; the second location can be at the human ear's position determined by the driver's seat. After the volume sound source and microphone are arranged, a voltage measurement of the volume sound source during sound emission can be obtained. This voltage measurement can then be input into a voltage-to-sound conversion model to obtain a converted sound data reference value. The sound insulation of the vehicle's cockpit can then be determined by comparing the sound data reference value with the corresponding sound data received from the microphone.

[0030] It should be understood that the embodiments of this specification are not limited to the exemplary scenarios described above, but can also be applied to any variations of these exemplary scenarios and any other applicable scenarios.

[0031] Figure 2 FIG. 1 is a flowchart illustrating an example of a method 200 for measuring sound insulation according to an embodiment of the present specification.

[0032] like Figure 2 As shown, in step S210, a voltage measurement value of a volumetric sound source placed at a first position when emitting sound can be obtained. In some examples, depending on the target object to be measured, the first position can be set inside or outside the target object to be measured. For example, the target object to be measured can be a refrigerator, a washing machine, a generator, a fan, a vehicle, etc. Accordingly, the first position can be set outside a refrigerator, a washing machine, a generator, a fan, inside a vehicle cockpit, etc. In this embodiment, the voltage measurement value can be used to reflect the volumetric acceleration of the volumetric sound source when emitting sound. In some examples, the output voltage of the volumetric acceleration sensor built into the volumetric sound source when emitting sound can be directly read as the voltage measurement value. In this embodiment, the volumetric acceleration sensor can refer to a non-microphone device that can directly convert the volumetric acceleration of the volumetric sound source when emitting sound into a voltage signal for output. In some examples, a high-precision voltage measuring instrument can be used to directly measure the output voltage of the volumetric acceleration sensor built into the volumetric sound source when emitting sound as the voltage measurement value. In some examples, the unit of volumetric acceleration can be cubic meters per second squared.

[0033] In step S220, the voltage measurement value can be input into a voltage-to-sound conversion model to obtain a converted sound data reference value. In some examples, the voltage-to-sound conversion model can be used to indicate the correspondence between the output voltage of a built-in volume accelerometer of a volume sound source and the sound characteristics (e.g., frequency, sound pressure, sound intensity, loudness, etc.) actually emitted by the volume sound source. In some examples, the voltage-to-sound conversion model can be an empirical model established by analyzing a large amount of experimental data. The voltage-to-sound conversion model can include at least a voltage-to-sound power conversion process and a sound power-to-sound pressure level conversion process. The voltage-to-sound conversion model can include corresponding model parameters. In some examples, the model parameters involved in the voltage-to-sound power conversion process can include coefficients and a base a, and the model parameters involved in the sound power-to-sound pressure level conversion process can include a compensation parameter gap. A detailed description is provided below. In some examples, the values of these model parameters can be calculated after analyzing a large amount of experimental data.

[0034] In step S230, a sound data reception value can be obtained. In some examples, the sound data reception value can be determined based on sound data collected by a microphone positioned at a second position when a volumetric sound source emits sound. In some examples, the first and second positions can be separated on either side of the target object to be measured. In the aforementioned example, the second position can be located at the noise source, such as at the compressor of a refrigerator, the drum of a washing machine, the motor of a washing machine, inside a generator housing, inside a fan housing, or at a vehicle's internal combustion engine and / or motor. In some examples, the first and second positions can be interchangeable. For example, the first position can be located outside the vehicle cabin, such as at a wheel, the internal combustion engine, and / or motor. Accordingly, the second position can also be located inside the vehicle cabin, such as in the human ear region determined by reference to the seat position. In some examples, the microphone can record the collected audio data. The collected audio data can be analyzed using various methods, such as Fourier transform and spectral analysis, to obtain the sound data reception value expressed in various formats (e.g., frequency, sound pressure, sound intensity, loudness, etc.).

[0035] In step S240, the sound insulation level of the target object under test can be determined based on the sound data reference value and the corresponding received sound data value. In some examples, the sound insulation level of the target object under test can be determined based on the difference between the sound data reference value and the corresponding received sound data value. For example, when the sound data reference value and the corresponding received sound data value are expressed as sound pressure levels, the sound insulation level of the target object under test can be determined based on the difference between the sound data reference value and the corresponding received sound data value. For another example, when the sound data reference value and the corresponding received sound data value are expressed as sound intensity, the sound insulation level of the target object under test can be determined based on the ratio between the sound data reference value and the corresponding received sound data value. It will be appreciated that a greater sound insulation level indicates better sound insulation performance.

[0036] It should be understood that all steps and their order in process 200 are exemplary, and embodiments of the present disclosure also encompass any modifications to process 200. For example, in some implementations, step S230 may be performed first, followed by step S220.

[0037] Figure 3A and Figure 3B A schematic diagram showing an example of the first position and the second position according to an embodiment of the present specification. When the target object to be detected is a vehicle, the first position may include the area where the human ear is located in the cockpit, and the second position may include the area where the vehicle power device is located. Figure 3A As shown, the first position may be the area where the driver's ear is located in the cockpit, such as the area where the driver's outer ear is located. The second position may be the area where the internal combustion engine and / or electric motor is located. Figure 3B As shown, the first location may be the area where the passenger's ears are located in the cockpit, such as the outer ear of the co-pilot. The second location may be the area where the internal combustion engine and / or electric motor is located. In some examples, there may be multiple microphones. In some examples, the multiple microphones may be arranged in an array around the internal combustion engine and / or electric motor. In some examples, the multiple microphones may be evenly distributed around the center of the internal combustion engine and / or electric motor.

[0038] It should be understood that the first position and the second position of the embodiments of this specification are not limited to the examples described above, but any variations of these examples may also exist.

[0039] Figure 4 A flowchart illustrating an example of a sound data reference value conversion process 400 according to an embodiment of the present specification. Figure 4 The conversion process 400 shown in FIG. Figure 2 Another exemplary implementation of step S220 in

[0066] In this embodiment, the received sound data value can be expressed in the form of sound pressure level. The reference sound data value can be expressed in the form of sound pressure level.

[0040] In some implementations, when the target object to be measured is a vehicle, the values of the model parameters of the voltage-to-sound conversion model can be adjusted based on the test environment and / or vehicle model. For example, if factors such as the temperature, humidity, air pressure, altitude, etc. of the test environment change, and / or the vehicle model changes, one or more of the model parameters can be fine-tuned based on the fitting results of historical test data.

[0041] like Figure 4 As shown, in step S410, a sound power reference value corresponding to the first position can be obtained by converting the voltage measurement value and the volumetric acceleration sensitivity of the volumetric sound source using a voltage-to-sound power conversion model. In this embodiment, the voltage-to-sound power conversion process can be used to indicate a corresponding relationship between the product of the volumetric acceleration sensitivity of the volumetric sound source and the voltage measurement value and the sound power. In some examples, the voltage-to-sound power conversion process can be used to indicate that the sound power has a positive correlation with the logarithm of the product of the volumetric acceleration sensitivity of the volumetric sound source and the voltage measurement value.

[0042] In some examples, the voltage-to-acoustic power conversion process can be expressed as: .in, can be the sound power, Can be a positive coefficient, a can be a positive base, The volume acceleration sensitivity of the volume sound source can be used to reflect the ability of the volume sound source to convert electrical energy into sound energy. The value range of can be (16,25), and the value range of a can be (6,12). In some examples, The value of can be 20, and the value of a can be 10.

[0043] In step S420, the sound power reference value corresponding to the first location can be converted into a sound data reference value expressed in sound pressure level corresponding to the first location through a sound power-to-sound pressure level conversion process. In some examples, the sound power-to-sound pressure level conversion process can be used to indicate a positive correlation between sound power and sound pressure level. Thus, the sound insulation level of the target object to be measured can be determined based on the sound data reference value expressed in sound pressure level corresponding to the first location and the corresponding received sound data value expressed in sound pressure level.

[0044] In some examples, the sound power to sound pressure level conversion process can be expressed as: .in, It can be a sound pressure level, and gap can be a compensation parameter. In some examples, the value range of gap can be [80,95]. In some examples, the value range of gap can be (82,85). In some examples, the value range of gap can be (88,92).

[0045] In some implementations, the voltage-to-sound conversion model may further include a distance correction process. The distance correction process may further convert the sound data reference value represented by the sound pressure level corresponding to the first location into the sound data reference value represented by the sound pressure level corresponding to the second location based on the distance between the first location and the second location. In these implementations, the distance correction process may be used to indicate a correspondence between the distance between the first location and the second location and the sound pressure level value to be corrected. In some examples, the distance correction process may be expressed as: .in, It can be a sound data reference value corresponding to the second position expressed in sound pressure level, may be a sound data reference value corresponding to the first position expressed in sound pressure level, r may be the distance between the first position and the second position, Can be a reference area (1m 2 ).

[0046] use Figure 4 The method shown in provides a specific method for converting voltage to sound pressure level using the volume acceleration sensitivity and voltage measurement value of the volume sound source as inputs to the voltage-sound conversion model, which can more accurately reflect the actual acoustic conversion relationship.

[0047] Figure 5 A flowchart illustrating another example of a method 500 for measuring sound insulation according to an embodiment of this specification is shown. Figure 5 Steps S510 to S550 shown in FIG. Figure 2 and Figure 4 The corresponding steps in the Figure 5 To avoid duplication, only the differences are described here.

[0048] like Figure 5 As shown, in step S510, a voltage measurement value of a volume sound source arranged at a first position when emitting sound may be obtained.

[0049] In step S520, a sound power reference value corresponding to the first position may be obtained by converting the voltage measurement value and the volume acceleration sensitivity of the volume sound source through a voltage-to-sound power conversion process.

[0050] In step S530 , the sound power reference value corresponding to the first position may be converted into a sound data reference value represented by a sound pressure level corresponding to the first position through a sound power-to-sound pressure level conversion process.

[0051] In step S540 , the sound data reference value expressed in sound pressure level corresponding to the first position may be converted into a sound data reference value expressed in sound pressure level corresponding to the second position according to the distance between the first position and the second position through a distance correction process.

[0052] At step S550, a received sound data value expressed as a sound pressure level may be obtained. The received sound data value may be determined based on sound data collected by a microphone positioned at a second position when a volumetric sound source emits sound. The first position and the second position may be located on opposite sides of the target object.

[0053] At step S560, the sound insulation level of the target object to be measured can be determined based on the reference sound data value represented by the sound pressure level corresponding to the second position and the corresponding received sound data value represented by the sound pressure level. In some examples, the sound insulation level of the target object to be measured can be determined as the difference between the reference sound data value represented by the sound pressure level corresponding to the second position and the corresponding received sound data value represented by the sound pressure level.

[0054] use Figure 5 The method shown in can correct the sound reduction caused by the distance between the microphone and the volume sound source, thereby further improving the accuracy of the sound insulation measurement.

[0055] Figure 6 A flowchart illustrating an example of a method 600 for measuring vehicle sound insulation according to an embodiment of the present specification is shown.

[0056] like Figure 6 As shown, in step S610, when a volumetric sound source located in the target vehicle's cockpit, near the human ear, emits sound, a voltage value of the volumetric sound source can be measured, and sound data can be collected using multiple microphones located at different locations in the area where the vehicle's power unit is located. In some examples, the collected sound data can be raw audio data.

[0057] At step S620, the measured voltage value can be input into a voltage-to-sound conversion model to obtain a converted sound data reference value. In some examples, the sound data reference value can be represented in various forms (e.g., frequency, sound pressure, sound intensity, loudness, etc.). The voltage-to-sound conversion model may include at least a voltage-to-sound power conversion process and a sound power-to-sound pressure level conversion process.

[0058] At step S630, the sound data may be converted into received sound data values corresponding to the sound data reference values. In some examples, the sound data may be analyzed in various ways to convert the received sound data values into values consistent with the representation of the sound data reference values. For example, when the sound data reference values are represented in the form of sound intensity, the sound data may be converted into received sound data values represented in the form of sound intensity. For another example, when the sound data reference values are represented in the form of sound pressure levels, the sound data may be converted into received sound data values represented in the form of sound pressure levels.

[0059] In step S640 , the sound insulation level of the target vehicle may be determined based on the sound data reference value and the corresponding sound data reception value.

[0060] It should be noted that the specific operations of the above steps S610 to S640 can be referred to respectively. Figure 2-Figure 5 The corresponding descriptions of the steps with similar operations are not repeated here.

[0061] Figure 7 A flowchart illustrating another example of a method 700 for measuring vehicle sound insulation according to an embodiment of the present specification is shown.

[0062] like Figure 7 As shown, in step S710, the volume sound source is placed in the cockpit at the location of the driver's and passenger's ears, and multiple sounds are emitted at different sound frequencies at each location. In some examples, the volume sound source can be placed at the location of the driver's outer ear (for example, the left ear) in the cockpit, and the sound frequencies can be used to emit multiple sounds at different frequencies. (low frequency), (IF), (High frequency) 、 、 In some examples, the volume sound source can be placed at the position of the passenger's ear (such as the co-pilot's right ear) in the cockpit, with the sound frequency (low frequency), (IF), (High frequency) 、 、 In some examples, ~ They may all be the same, all different, or partially the same. In some examples, and can be the same or different; similarly, and It can be the same or different; and It can be the same or different.

[0063] At step S720, each time a sound is emitted, the voltage value of the volume sound source is measured, and sound data is collected by multiple microphones arranged at different locations in the area where the vehicle power unit is located. In some examples, the volume sound source is detected at the location of the driver's outer ear (e.g., left ear) in the cockpit at the sound frequency. Low frequency) Each microphone can collect Group of sound data, each group of sound data corresponds to It can be seen that each microphone can collect the same number of sound data as the total number of sound utterances.

[0064] In step S730, the measured voltage value can be input into a voltage-to-sound conversion model to obtain a converted sound data reference value. In some examples, the voltage value corresponding to each sound emission of the volumetric sound source can be converted into a corresponding sound data reference value. In some examples, the sound data reference value is expressed in sound pressure level. The voltage-to-sound conversion model may include at least a voltage-to-sound power conversion process and a sound power-to-sound pressure level conversion process.

[0065] At step S740, the sound data can be converted into a received sound data value corresponding to the sound data reference value. In some examples, the sound data corresponding to each sound emission of the volumetric sound source can be converted into a corresponding received sound data value. It will be appreciated that each time the volumetric sound source emits a sound, there is a corresponding set of sound data reference values and received sound data values. In some examples, the received sound data values are also expressed in sound pressure levels.

[0066] In step S750, the sound data received values corresponding to the multiple microphones arranged at different positions can be summarized and analyzed to obtain the sound data analysis results corresponding to different areas and different frequencies in the cabin. In this embodiment, different summary analysis methods can be used according to different test purposes. In some examples, referring to the previous example, if the sound insulation effect of the main driver's seat is to be tested, the sound data received by each microphone can be combined with the sound data received by each microphone. The sound data received values expressed in sound pressure level are averaged among multiple microphones and averaged among multiple times, so that the sound pressure corresponding to the position of the driver's outer ear (for example, the left ear) in the cockpit and the sound frequency can be obtained. Similarly, the position of the driver's outer ear (for example, left ear) and the sound frequency in the cockpit can be obtained. 、 and the position and frequency of the sound corresponding to the passenger's ear in the cockpit (such as the co-pilot's right ear) ~ In some examples, referring to the previous example, if you want to test the sound insulation effect of the front seats, you usually use = and = and = The sound data analysis results at the pilot's outer ear (for example, left ear) and the co-pilot's right ear corresponding to the same sound frequency can be averaged between the two ear positions, so as to obtain the sound data corresponding to the middle position of the front seat in the cockpit and the corresponding sound frequency. 、 、 The results of radio data analysis.

[0067] In step S760, the sound data reference values for different sound frequencies are aggregated and analyzed to obtain a sound data analysis result corresponding to the sound reception data analysis result. In some examples, the sound data reference values for each sound transmission can be averaged with reference to the sound reception data analysis result to obtain a sound data analysis result corresponding to the sound reception data analysis result.

[0068] In step S770, the sound insulation level of the target vehicle is determined based on the difference between the sound data analysis results and the corresponding sound reception data analysis results. In some examples, at each sound frequency, the difference between the sound data analysis results and the corresponding sound reception data analysis results can be used to determine the sound insulation level of the target vehicle at that sound frequency. It will be appreciated that the sound insulation levels at multiple sound frequencies can be formed into a sound insulation level curve. The horizontal axis of the sound insulation level curve can represent different sound frequencies, and the vertical axis can represent the corresponding sound insulation level at each sound frequency.

[0069] use Figure 1-Figure 7 The methods for measuring sound insulation and vehicle sound insulation disclosed in [2] can directly measure a voltage value reflecting the volumetric acceleration of a volumetric sound source during sound emission, and obtain a received sound data value determined based on sound data received by a microphone positioned on the other side of a target object (e.g., a vehicle) to be measured. Using a pre-established voltage-to-sound conversion model that includes at least voltage-to-sound power conversion and sound power-to-sound pressure level conversion, the voltage value is converted into a sound measurement value of the volumetric sound source during actual sound emission. The sound insulation of the target object (e.g., a vehicle) is then determined by comparing the sound measurement value with the received sound data value. This allows the direct measurement of the sound emission of a volumetric sound source to be converted to an indirect estimation of the actual sound emission characteristics through voltage. If the voltage-to-sound conversion model is effective, the actual sound emission of the volumetric sound source can be more accurately and quickly reflected, thereby improving the accuracy of sound insulation measurement.

[0070] Figure 8 FIG1 shows a block diagram of an example of a device 800 for measuring sound insulation according to an embodiment of the present specification. Figure 2-Figure 5 Corresponding to the method embodiment shown, the device can be implemented using software, hardware, or a combination of software and hardware, and can be specifically applied to various electronic devices.

[0071] like Figure 8 As shown, the apparatus 800 for measuring sound insulation may include a voltage acquiring unit 810 , a sound data acquiring unit 820 , a voltage-to-sound converting unit 830 , and a sound insulation determining unit 840 .

[0072] The voltage acquisition unit 810 is configured to obtain a voltage measurement value of a volume sound source arranged at a first position when emitting sound, wherein the voltage measurement value is used to reflect the volume acceleration of the volume sound source when emitting sound.

[0073] The sound data acquisition unit 820 is configured to obtain a sound data reception value, wherein the sound data reception value is determined based on sound data collected by a microphone arranged at a second position when the volume sound source emits sound, the first position and the second position being separated on either side of the target object to be measured.

[0074] In some examples, the sound data reception value is expressed as a sound pressure level.

[0075] In some examples, the target object to be measured is a vehicle, the first position includes the area where a human ear is located in the cockpit, the second position includes the area where a vehicle-mounted power device is located, and there are multiple microphones.

[0076] The voltage-to-sound conversion unit 830 is configured to input the voltage measurement value into a voltage-to-sound conversion model to obtain a converted sound data reference value.

[0077] In some examples, the voltage-to-sound conversion model includes at least a voltage-to-sound power conversion process and a sound power-to-sound pressure level conversion process, and the sound data reference value is expressed in sound pressure level. The voltage-to-sound conversion unit 830 is further configured to: obtain a sound power reference value corresponding to the first position based on the voltage measurement value and the volume acceleration sensitivity of the volume sound source through the voltage-to-sound power conversion process, wherein the voltage-to-sound power conversion process is used to indicate the corresponding relationship between the product of the volume acceleration sensitivity of the volume sound source and the voltage measurement value and the sound power; and convert the sound power reference value corresponding to the first position into a sound data reference value corresponding to the first position expressed in sound pressure level through the sound power-to-sound pressure level conversion process.

[0078] In some examples, the voltage-to-acoustic power conversion process includes: ,in, is the sound power, is a positive coefficient, a is a positive base, is the volume acceleration sensitivity of the volume sound source, and V is the voltage measurement value.

[0079] In some examples, the sound power to sound pressure level conversion process includes: ,in, is the sound pressure level, and gap is the compensation parameter.

[0080] In some examples, the voltage-to-sound conversion model also includes a distance correction process, and the voltage-to-sound conversion unit 830 is further configured to: convert the sound data reference value expressed in sound pressure level corresponding to the first position into the sound data reference value expressed in sound pressure level corresponding to the second position according to the distance between the first position and the second position through the distance correction process, wherein the distance correction process is used to indicate the correspondence between the distance between the first position and the second position and the sound pressure level value that needs to be corrected.

[0081] In some examples, parameter values of model parameters of the voltage-to-sound conversion model are adjusted according to a test environment in which the vehicle is located and / or a model of the vehicle.

[0082] The sound insulation level determining unit 840 is configured to determine the sound insulation level of the target object to be measured according to the sound data reference value and the corresponding sound data received value.

[0083] In some examples, the sound insulation level determining unit 840 is further configured to determine the sound insulation level of the target object to be measured based on the sound data reference value represented by the sound pressure level corresponding to the first position and the corresponding sound data received value represented by the sound pressure level.

[0084] In some examples, the sound insulation level determination unit 840 is further configured to determine the sound insulation level of the target object to be measured based on the sound data reference value represented by the sound pressure level corresponding to the second position and the corresponding sound data received value represented by the sound pressure level.

[0085] The operations of the voltage acquisition unit 810, the sound data acquisition unit 820, the voltage-sound conversion unit 830, and the sound insulation determination unit 840 can refer to the above. Figure 2 Steps S210 to S240 described and Figure 3A 、 Figure 3B 、 Figure 4 and Figure 5 The corresponding description in .

[0086] Figure 9 A block diagram illustrating an example of a system 900 for measuring vehicle sound insulation according to an embodiment of this specification.

[0087] like Figure 9 As shown, a system 900 for measuring vehicle sound insulation may include: a volume sound source 910, a voltage meter 920, multiple microphones 930, and a processor 940. The processor 940 may be configured to control the volume sound source 910 to emit sound; control the voltage meter 920 to measure a voltage value when the volume sound source emits sound, wherein the voltage value reflects the volume acceleration of the volume sound source when emitting sound; obtain sound data collected by the multiple microphones 930 when the volume sound source 910 emits sound; input the voltage value into a voltage-to-sound conversion model to obtain a converted sound data reference value, wherein the voltage-to-sound conversion model includes at least a voltage-to-sound power conversion process and a sound power-to-sound pressure level conversion process; convert the sound data into a sound data received value corresponding to the sound data reference value; and determine the sound insulation of the vehicle under test based on the sound data reference value and the corresponding sound data received value.

[0088] It is understood that the detailed description of the volume sound source 910, the voltage meter 920, the plurality of microphones 930 and the processor 940 can refer to the aforementioned Figure 2-Figure 8 The specific description in the embodiments will not be repeated here.

[0089] Reference above Figures 1 to 9 , embodiments of a method and apparatus for measuring sound insulation and a method and system for measuring vehicle sound insulation according to embodiments of this specification are described.

[0090] The apparatus for measuring sound insulation in the embodiments of this specification can be implemented using hardware, software, or a combination of hardware and software. For example, software implementation, as a logically defined device, is implemented by the processor of the device in which it resides, reading corresponding computer program instructions from memory into internal memory and executing them. In the embodiments of this specification, the apparatus for measuring sound insulation can be implemented, for example, using an electronic device.

[0091] Figure 10 A schematic diagram illustrating an example of an electronic device 1000 according to an embodiment of this specification.

[0092] like Figure 10As shown, the electronic device 1000 may include at least one processor 1010, a memory (e.g., a non-volatile memory) 1020, a storage 1030, and a communication interface 1040, and the at least one processor 1010, the storage 1020, the storage 1030, and the communication interface 1040 are connected together via a bus 1050. The at least one processor 1010 executes at least one computer-readable instruction stored or encoded in the memory (i.e., the above-mentioned elements implemented in the form of software).

[0093] In one embodiment, computer-executable instructions are stored in a memory, which, when executed, cause at least one processor 1010 to: obtain a voltage measurement value of a volume sound source arranged at a first position when emitting sound, wherein the voltage measurement value is used to reflect the volume acceleration of the volume sound source when emitting sound; input the voltage measurement value into a voltage-sound conversion model to obtain a converted sound data reference value, wherein the voltage-sound conversion model at least includes a voltage-sound power conversion process and a sound power-sound pressure level conversion process; obtain a sound data reception value, wherein the sound data reception value is determined based on sound data collected by a microphone arranged at a second position when the volume sound source emits sound, the first position and the second position being separated on both sides of the target object to be measured; and determine the sound insulation of the target object to be measured based on the sound data reference value and the corresponding sound data reception value.

[0094] It should be understood that the computer executable instructions stored in the memory, when executed, cause at least one processor 1010 to perform the above combined operations in various embodiments of this specification. Figure 1-Figure 7 Describes the various operations and functions.

[0095] According to one embodiment, a computer program product is provided. The computer program product may include a computer program (i.e., the above elements implemented in software form), which, when executed by a processor, causes the processor to perform the above combined operations in various embodiments of this specification. Figure 1-Figure 7 Describes the various operations and functions.

[0096] Specifically, a system or device equipped with a readable storage medium can be provided, on which software program codes that implement the functions of any of the above-mentioned embodiments are stored, and a computer or processor of the system or device can read and execute instructions stored in the readable storage medium.

[0097] In this case, the program code itself read from the machine-readable medium can realize the function of any one of the above embodiments, and thus the machine-readable code and the machine-readable storage medium storing the machine-readable code constitute part of the present invention.

[0098] The computer program code required for the operation of various portions of this specification can be written in any one or more programming languages, including object-oriented programming languages such as Java, Scala, Smalltalk, Eiffel, JADE, Emerald, C++, C#, VB, .NET, and Python, conventional procedural programming languages such as C, Visual Basic 2003, Perl, COBOL 2002, PHP, and ABAP, dynamic programming languages such as Python, Ruby, and Groovy, or other programming languages. The program code can be executed on the user's computer, or as a standalone software package on the user's computer, or partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the latter case, the remote computer can be connected to the user's computer via any network, such as a local area network (LAN) or wide area network (WAN), or connected to an external computer (e.g., via the Internet), or in a cloud computing environment, or as a service, such as software as a service (SaaS).

[0099] Examples of readable storage media include floppy disks, hard disks, magneto-optical disks, optical disks (e.g., CD-ROMs, CD-Rs, CD-RWs, DVD-ROMs, DVD-RAMs, DVD-RWs, DVD-RWs), magnetic tapes, non-volatile memory cards, and ROMs. Alternatively, the program code may be downloaded from a server computer or a cloud via a communication network.

[0100] The foregoing description of this specification describes specific embodiments. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims can be performed in an order different from that described in the embodiments and still achieve the desired results. Furthermore, the processes depicted in the accompanying drawings do not necessarily require the specific order shown or the sequential order to achieve the desired results. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0101] Not all steps and units in the above processes and system structure diagrams are required, and some steps or units can be omitted according to actual needs. The execution order of each step is not fixed and can be determined as needed. The device structure described in the above embodiments can be a physical structure or a logical structure, that is, some units may be implemented by the same physical entity, or some units may be implemented by multiple physical entities, or may be implemented by certain components in multiple independent devices.

[0102] The term "exemplary" is used throughout this specification to mean "serving as an example, instance, or illustration" and does not imply "preferred" or "advantageous" over other embodiments. The detailed description includes specific details for the purpose of providing an understanding of the described techniques. However, these techniques can be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described embodiments.

[0103] The above describes in detail the optional implementation methods of the embodiments of this specification in conjunction with the accompanying drawings. However, the embodiments of this specification are not limited to the specific details of the above implementation methods. Within the technical concept of the embodiments of this specification, various simple modifications can be made to the technical solutions of the embodiments of this specification, and these simple modifications all fall within the scope of protection of the embodiments of this specification.

[0104] The foregoing description of this specification is provided to enable any person skilled in the art to implement or use the present disclosure. Various modifications to this disclosure will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other variations without departing from the scope of this disclosure. Therefore, this disclosure is not limited to the examples and designs described herein, but is intended to be consistent with the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for measuring sound insulation, comprising: Obtaining a voltage measurement value of a volume sound source arranged at a first position when emitting sound, wherein the voltage measurement value is used to reflect a volume acceleration of the volume sound source when emitting sound; Inputting the voltage measurement value into a voltage-to-sound conversion model to obtain a converted sound data reference value, wherein the voltage-to-sound conversion model includes at least a voltage-to-sound power conversion process and a sound power-to-sound pressure level conversion process, wherein the voltage-to-sound power conversion process is used to convert the magnitude of the output voltage of the built-in volume acceleration sensor of the volume sound source reflected by the voltage measurement value into the magnitude of the sound power of the sound actually emitted by the volume sound source; Obtaining a sound data reception value, wherein the sound data reception value is determined based on sound data collected by a microphone arranged at a second position when the volume sound source emits sound, the first position and the second position being separated on either side of the target object to be measured; and The sound insulation value of the target object to be measured is determined according to the sound data reference value and the corresponding sound data received value.

2. The method according to claim 1, wherein The received sound data value is expressed in sound pressure level, and the reference sound data value is expressed in sound pressure level.

3. The method according to claim 2, wherein: Inputting the voltage measurement value into a voltage-sound conversion model to obtain a converted sound data reference value includes: Obtaining a sound power reference value corresponding to the first position by converting the voltage measurement value and the volume acceleration sensitivity of the volume sound source through the voltage-to-sound power conversion process, wherein the voltage-to-sound power conversion process is used to indicate a corresponding relationship between a product of the volume acceleration sensitivity of the volume sound source and the voltage measurement value and the sound power; and converting the sound power reference value corresponding to the first position into a sound data reference value represented by a sound pressure level corresponding to the first position through the sound power-sound pressure level conversion process; The determining the sound insulation value of the target object to be measured according to the sound data reference value and the corresponding sound data received value includes: The sound insulation value of the target object to be measured is determined according to the sound data reference value represented by the sound pressure level corresponding to the first position and the corresponding sound data received value represented by the sound pressure level.

4. The method according to claim 3, wherein: The voltage-to-acoustic power conversion process includes: L w =K1×log a (S vs × V), where L w is the sound power, K1 is a positive coefficient, a is a positive base, S va is the volume acceleration sensitivity of the volume sound source, and V is the voltage measurement value.

5. The method according to claim 4, wherein: The sound power-sound pressure level conversion process includes: L p =L w +gap, where L p is the sound pressure level, and gap is the compensation parameter.

6. The method of claim 3, wherein: The voltage-to-sound conversion model also includes a distance correction process, Inputting the voltage measurement value into a voltage-sound conversion model to obtain a converted sound data reference value further includes: The distance correction process converts the sound data reference value represented by the sound pressure level corresponding to the first position into the sound data reference value represented by the sound pressure level corresponding to the second position according to the distance between the first position and the second position, wherein the distance correction process is used to indicate the corresponding relationship between the distance between the first position and the second position and the sound pressure level value to be corrected, The determining the sound insulation value of the target object to be measured according to the sound data reference value and the corresponding sound data received value includes: The sound insulation value of the target object to be measured is determined according to the sound data reference value represented by the sound pressure level corresponding to the second position and the corresponding sound data received value represented by the sound pressure level.

7. The method according to any one of claims 1 to 6, wherein: The target object to be measured is a vehicle, the first position includes the area where the human ear is located in the cockpit, the second position includes the area where the vehicle-mounted power device is located, and there are multiple microphones.

8. The method of claim 7, wherein: The parameter values of the model parameters of the voltage-to-sound conversion model are adjusted according to the test environment in which the vehicle is located and / or the model of the vehicle.

9. A device for measuring sound insulation, comprising: a voltage acquisition unit configured to obtain a voltage measurement value of a volume sound source arranged at a first position when emitting sound, wherein the voltage measurement value is used to reflect a volume acceleration of the volume sound source when emitting sound; a sound data acquisition unit configured to obtain a sound data reception value, wherein the sound data reception value is determined based on sound data collected by a microphone arranged at a second position when the volume sound source emits sound, the first position and the second position being separated on either side of the target object to be measured; a voltage-to-sound conversion unit configured to input the voltage measurement value into a voltage-to-sound conversion model to obtain a converted sound data reference value, wherein the voltage-to-sound conversion model includes at least a voltage-to-sound power conversion process and a sound power-to-sound pressure level conversion process, wherein the voltage-to-sound power conversion process is used to convert the magnitude of the output voltage of the built-in volume acceleration sensor of the volume sound source reflected by the voltage measurement value into the magnitude of the sound power of the sound actually emitted by the volume sound source; and The sound insulation level determining unit is configured to determine the sound insulation level of the target object to be measured according to the sound data reference value and the corresponding sound data received value.

10. An electronic device comprising: At least one processor, a memory coupled to the at least one processor, and a computer program stored in the memory, wherein the at least one processor executes the computer program to implement the method for measuring sound insulation according to any one of claims 1 to 8.

11. A computer program product, comprising a computer program, wherein the computer program is executed by a processor to implement the method for measuring sound insulation according to any one of claims 1 to 8.

12. A method for measuring vehicle sound insulation, comprising: When the volume sound source placed in the target vehicle's cockpit, where the human ear is located, measuring a voltage value of the volume sound source, wherein the voltage value is used to reflect the volume acceleration of the volume sound source when emitting sound; Acquiring sound data through a plurality of microphones arranged at different locations in the area where the vehicle power unit is located; Inputting the measured voltage value into a voltage-to-sound conversion model to obtain a converted sound data reference value, wherein the voltage-to-sound conversion model includes at least a voltage-to-sound power conversion process and a sound power-to-sound pressure level conversion process, wherein the voltage-to-sound power conversion process is used to convert the magnitude of the output voltage of the built-in volume acceleration sensor of the volume sound source reflected by the voltage measurement value into the magnitude of the sound power of the sound actually emitted by the volume sound source; converting the sound data into a sound data reception value corresponding to the sound data reference value; and The sound insulation level of the target vehicle is determined according to the sound data reference value and the corresponding sound data reception value.

13. The method of claim 12, wherein: The method further comprises: The volume sound source is placed in the driver and passenger ear areas in the cockpit, and multiple sounds are emitted at different frequencies at each location. The determining the sound insulation level of the target vehicle according to the sound data reference value and the corresponding sound data received value includes: Summarizing and analyzing the sound data reception values corresponding to the plurality of microphones arranged at different positions to obtain sound data analysis results corresponding to different areas and different frequencies in the cabin; Performing corresponding summary analysis on the sound data reference values of different sound frequencies to obtain a sound data analysis result corresponding to the sound reception data analysis result; and The sound insulation level of the target vehicle is determined based on a difference between the sound emission data analysis result and the corresponding sound reception data analysis result.

14. A system for measuring vehicle sound insulation, comprising: Volumetric sound source; Voltage measuring instrument; Multiple microphones; as well as a processor configured to control the volume sound source to emit sound; Control the voltage measuring instrument to measure the voltage value of the volume sound source when making a sound, wherein the voltage value is used to reflect the volume acceleration of the volume sound source when making a sound; obtain the sound data collected by the multiple microphones when the volume sound source makes a sound; input at least the voltage value into a voltage-sound conversion model to obtain a converted sound data reference value, wherein the voltage-sound conversion model at least includes a voltage-sound power conversion process and a sound power-sound pressure level conversion process, and the voltage-sound power conversion process is used to convert the output voltage of the built-in volume acceleration sensor of the volume sound source reflected by the voltage measurement value into the sound power of the sound actually emitted by the volume sound source; convert the sound data into a sound data reception value corresponding to the sound data reference value; and determine the sound insulation of the vehicle to be tested based on the sound data reference value and the corresponding sound data reception value.

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