CN108507669B - Intermittent burst environment noise reduction method and device for sound level measurement of power equipment - Google Patents
Intermittent burst environment noise reduction method and device for sound level measurement of power equipment Download PDFInfo
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Abstract
本发明公开了一种电力设备声级测量的间歇性突发环境噪声降噪方法及装置，方法实施步骤包括：获取电力设备的声信号并多层时频分解，查找各分解频带中环境噪声的突发点，判断每个分解频带中第一个突发点之前是否具有足够长度的声信号，如果每个分解频带都满足条件，则利用计算功率谱差与反向傅里叶变换方法还原出各个分解频带的纯净的声信号、根据各个分解频带的纯净的声信号还原出电力设备的纯净的声信号；装置包括实施前述方法的计算机设备或者声级仪。本发明能够降低电力设备声级测量过程中间歇性突发环境噪声干扰，提高电力设备声级测量过程的抗干扰能力，具有操作方便、检测效率与精度高的优点。
The invention discloses a method and device for noise reduction of intermittent sudden environmental noise for sound level measurement of power equipment. The implementation steps of the method include: acquiring the sound signal of the power equipment, decomposing multi-layer time-frequency, and searching for the environmental noise in each decomposed frequency band. Burst point, determine whether there is a sound signal of sufficient length before the first burst point in each decomposition frequency band, if each decomposition frequency band satisfies the conditions, then use the calculation power spectrum difference and inverse Fourier transform method to restore The pure acoustic signal of each decomposed frequency band is restored to the pure acoustic signal of the electric equipment according to the pure acoustic signal of each decomposed frequency band; the apparatus includes a computer device or a sound level meter implementing the foregoing method. The invention can reduce the intermittent sudden environmental noise interference in the sound level measurement process of the power equipment, improve the anti-interference ability in the sound level measurement process of the power equipment, and has the advantages of convenient operation, high detection efficiency and high precision.
Description
技术领域technical field
本发明涉及电力设备声级测量技术，具体涉及一种电力设备声级测量的间歇性突发环境噪声降噪方法及装置。The invention relates to a sound level measurement technology of electrical equipment, in particular to a method and device for noise reduction of intermittent sudden environmental noise for sound level measurement of electrical equipment.
背景技术Background technique
电力设备声级测量是输变电工程建设环评与纠纷处理过程中需要开展的重要工作。实际声级检测过程中，电力设备声信号难免受到外界环境噪声的干扰，如汽车鸣笛、动物鸣叫等。现场检测工作人员通常需要等待漫长的时间，直至环境噪声干扰消失后才能继续测量，测量周期较长，测量效率低。对于持续出现的环境噪声，检测工作甚至无法开展。目前，通常的利用声级计检测电力设备声级的方法无法避免环境噪声的干扰，直接测量获得的结果与电力设备实际声级水平存在较大误差。Sound level measurement of power equipment is an important work that needs to be carried out in the process of environmental impact assessment and dispute resolution of power transmission and transformation projects. In the actual sound level detection process, the sound signal of electrical equipment is inevitably disturbed by external environmental noise, such as car whistle, animal chirping, etc. On-site inspection workers usually need to wait for a long time until the environmental noise interference disappears before continuing to measure. The measurement period is long and the measurement efficiency is low. Detection is not even possible with persistent ambient noise. At present, the usual method of detecting the sound level of electrical equipment with a sound level meter cannot avoid the interference of environmental noise, and there is a large error between the result obtained by direct measurement and the actual sound level of the electrical equipment.
发明内容SUMMARY OF THE INVENTION
本发明要解决的技术问题：针对现有技术的上述问题，提供一种电力设备声级测量的间歇性突发环境噪声降噪方法及装置，本发明能够降低电力设备声级测量过程中间歇性突发环境噪声干扰，提高电力设备声级测量过程的抗干扰能力，具有操作方便、检测效率与精度高的优点。The technical problem to be solved by the present invention: in view of the above problems of the prior art, a method and device for noise reduction of intermittent sudden environmental noise for sound level measurement of power equipment are provided. Sudden environmental noise interference improves the anti-interference ability of the sound level measurement process of power equipment, and has the advantages of convenient operation, high detection efficiency and high precision.
为了解决上述技术问题，本发明采用的技术方案为：In order to solve the above-mentioned technical problems, the technical scheme adopted in the present invention is:
本发明提供一种电力设备声级测量的间歇性突发环境噪声降噪方法，实施步骤包括：The invention provides a method for noise reduction of intermittent sudden environmental noise for sound level measurement of power equipment. The implementation steps include:
1）获取电力设备的声信号；1) Obtain the acoustic signal of the power equipment;
2）针对电力设备的声信号进行多层时频分解；2) Multi-layer time-frequency decomposition for the acoustic signal of power equipment;
3）查找多层时频分解得到的各个分解频带中环境噪声的突发点；3) Find the burst point of environmental noise in each decomposed frequency band obtained by multi-layer time-frequency decomposition;
4）针对多层时频分解得到的各个分解频带，判断每个分解频带中第一个突发点之前是否具有满足预设长度条件的声信号，如果每个分解频带中第一个突发点之前均具有满足预设长度条件的声信号，则跳转执行步骤5）；否则，结束并退出；4) For each decomposition frequency band obtained by multi-layer time-frequency decomposition, determine whether there is an acoustic signal that meets the preset length condition before the first burst point in each decomposition frequency band. If the first burst point in each decomposition frequency band If there is an acoustic signal that meets the preset length condition before, jump to step 5); otherwise, end and exit;
5）针对多层时频分解得到的各个分解频带，利用计算功率谱差与反向傅里叶变换方法还原出各个分解频带的纯净的声信号；5) For each decomposed frequency band obtained by multi-layer time-frequency decomposition, the pure acoustic signal of each decomposed frequency band is restored by calculating the power spectrum difference and the inverse Fourier transform method;
6）根据各个分解频带的纯净的声信号还原出电力设备的纯净的声信号。6) Restore the pure acoustic signal of the power equipment according to the pure acoustic signal of each decomposition frequency band.
优选地，步骤2）针对电力设备的声信号进行多层时频分解具体是指针对电力设备的声信号采用小波包分解算法进行多层时频分解；步骤3）查找多层时频分解得到的各个分解频带中环境噪声的突发点时，具体是指对小波分解的第1层细节系数查找该分解频带中环境噪声的突发点。Preferably, step 2) performing multi-layer time-frequency decomposition on the acoustic signal of the power equipment specifically refers to using the wavelet packet decomposition algorithm to perform multi-layer time-frequency decomposition on the acoustic signal of the power equipment; step 3) searching for the multi-layer time-frequency decomposition obtained by When decomposing the burst points of the environmental noise in each frequency band, it specifically refers to finding the burst points of the environmental noise in the decomposed frequency band from the first-level detail coefficients of the wavelet decomposition.
优选地，步骤4）中预设长度条件的声信号具体是指大于或等于0.5s时间长度的声信号。Preferably, the acoustic signal of the preset length condition in step 4) specifically refers to the acoustic signal with a time length greater than or equal to 0.5s.
优选地，步骤5）的详细步骤包括：Preferably, the detailed steps of step 5) include:
5.1）针对多层时频分解得到的各个分解频带遍历选择一个分解频带作为当前分解频带；5.1) For each decomposition frequency band obtained by multi-layer time-frequency decomposition, select a decomposition frequency band as the current decomposition frequency band;
5.2）计算当前分解频带第一个突发点之前声信号的功率谱P t(ω)、当前分解频带的功率谱P y(ω)，将当前分解频带的功率谱P y(ω)减去当前分解频带第一个突发点之前声信号的功率谱P t(ω)得到当前分解频带的功率谱差P s(ω)= P y (ω)-P t(ω)；5.2) Calculate the power spectrum P t ( ω ) of the acoustic signal before the first burst point of the current decomposition frequency band, and the power spectrum P y ( ω ) of the current decomposition frequency band, and subtract the power spectrum P y ( ω ) of the current decomposition frequency band. The power spectrum P t ( ω ) of the acoustic signal before the first burst point of the current decomposition frequency band obtains the power spectrum difference P s ( ω ) = P y ( ω ) - P t ( ω ) of the current decomposition frequency band;
5.3）根据当前分解频带的功率谱差P s(ω)计算当前分解频带的幅度谱Y s(ω)；5.3) Calculate the amplitude spectrum Y s ( ω ) of the current decomposition frequency band according to the power spectrum difference P s ( ω ) of the current decomposition frequency band;
5.4）对当前分解频带的幅度谱Y s(ω)进行反向傅里叶变换，还原出当前分解频带的环境噪声信号s(t)；5.4) Perform inverse Fourier transform on the amplitude spectrum Y s ( ω ) of the current decomposed frequency band, and restore the environmental noise signal s ( t ) of the current decomposed frequency band;
5.5）将当前分解频带的时域信号y(t)中减去s(t)，得出当前分解频带的纯净的声信号n(t)；5.5) Subtract s ( t ) from the time domain signal y (t) of the current decomposed frequency band to obtain the pure acoustic signal n ( t ) of the current decomposed frequency band;
5.6）判断分解频带是否遍历完毕，如果尚未遍历完毕，则遍历选择下一个分解频带作为当前分解频带，跳转执行步骤5.2）；否则，跳转执行步骤6）。5.6) Determine whether the traversal of the decomposed frequency band has been completed. If the traversal has not been completed, the traversal selects the next decomposed frequency band as the current decomposed frequency band, and jumps to step 5.2); otherwise, jumps to step 6).
优选地，步骤6）中根据各个分解频带的纯净的声信号还原出电力设备的纯净的声信号具体是指将各个分解频带的纯净的声信号相加得到电力设备的纯净的声信号。Preferably, in step 6), restoring the pure acoustic signal of the electric equipment according to the pure acoustic signal of each decomposed frequency band specifically refers to adding the pure acoustic signals of each decomposed frequency band to obtain the pure acoustic signal of the electric equipment.
此外，本发明还提供一种降低间歇性突发环境噪声的电力设备声级测量装置，包括计算机设备，所述计算机设备被编程以执行本发明降低间歇性突发环境噪声的电力设备声级测量方法的步骤。In addition, the present invention also provides a sound level measurement apparatus of electrical equipment for reducing intermittent sudden environmental noise, comprising a computer device programmed to perform the sound level measurement of electrical equipment for reducing intermittent sudden environmental noise of the present invention steps of the method.
此外，本发明还提供一种电力设备声级测量的间歇性突发环境噪声降噪装置，包括依次相连的传声器、前置放大器和声级计本体，所述声级计本体被编程以执行本发明电力设备声级测量的间歇性突发环境噪声降噪方法的步骤。In addition, the present invention also provides an intermittent sudden environmental noise reduction device for sound level measurement of electrical equipment, comprising a microphone, a preamplifier and a sound level meter body connected in sequence, the sound level meter body being programmed to perform this The steps of inventing a method for noise reduction of intermittent sudden environmental noise for sound level measurement of electrical equipment.
此外，本发明还提供一种电力设备声级测量装置，包括依次相连的传声器、前置放大器和声级计本体，所述前置放大器和声级计本体之间连接有前述电力设备声级测量的间歇性突发环境噪声降噪装置。In addition, the present invention also provides a sound level measurement device for electric equipment, comprising a microphone, a preamplifier and a sound level meter body connected in sequence, and the aforementioned electric equipment sound level measurement device is connected between the preamplifier and the sound level meter body. Intermittent burst ambient noise abatement device.
此外，本发明还提供一种电力设备声级测量装置，包括依次相连的传声器、前置放大器和声级计本体，所述声级计本体被编程以执行前述的电力设备声级测量的间歇性突发环境噪声降噪方法的步骤。In addition, the present invention also provides an electrical equipment sound level measurement device, comprising a microphone, a preamplifier and a sound level meter body connected in sequence, the sound level meter body being programmed to perform the aforementioned intermittent power equipment sound level measurement Steps of a burst ambient noise noise reduction method.
本发明电力设备声级测量的间歇性突发环境噪声降噪具有下述优点：The intermittent sudden environmental noise reduction of the sound level measurement of the power equipment of the present invention has the following advantages:
本发明方法获取电力设备的声信号后，针对电力设备的声信号进行多层时频分解、查找多层时频分解得到的各个分解频带中环境噪声的突发点；针对多层时频分解得到的各个分解频带，判断每个分解频带中第一个突发点之前是否具有满足预设长度条件的声信号，如果每个分解频带中第一个突发点之前均具有满足预设长度条件的声信号，则针对多层时频分解得到的各个分解频带，利用计算功率谱差与反向傅里叶变换方法还原出各个分解频带的纯净的声信号最终根据各个分解频带的纯净的声信号还原出电力设备的纯净的声信号，能够有效降低电力设备声级测量过程中间歇性突发环境噪声干扰，提高了电力设备声级测量过程中抗间歇性突发环境噪声干扰能力，具有操作方便、检测效率高、测试精度高的优点。After the method of the present invention acquires the acoustic signal of the power equipment, multi-layer time-frequency decomposition is performed on the acoustic signal of the power equipment, and the burst point of the environmental noise in each decomposed frequency band obtained by the multi-layer time-frequency decomposition is searched; each decomposed frequency band, determine whether there is an acoustic signal that meets the preset length condition before the first burst point in each decomposed frequency band, if there is an acoustic signal that meets the preset length condition before the first burst point in each decomposed frequency band For the acoustic signal, for each decomposed frequency band obtained by multi-layer time-frequency decomposition, the pure acoustic signal of each decomposed frequency band is restored by calculating the power spectrum difference and the inverse Fourier transform method. Finally, the pure acoustic signal of each decomposed frequency band is restored. The pure acoustic signal of the power equipment can effectively reduce the intermittent sudden environmental noise interference during the sound level measurement of the power equipment, and improve the ability to resist intermittent sudden environmental noise interference during the sound level measurement of the power equipment. It has the advantages of high detection efficiency and high test accuracy.
本发明电力设备声级测量的间歇性突发环境噪声降噪装置为本发明降低间歇性突发环境噪声的电力设备声级测量方法对应的装置，其同样也具有本发明降低间歇性突发环境噪声的电力设备声级测量方法的前述优点，在此不再赘述。本发明电力设备声级测量装置为包含本发明电力设备声级测量的间歇性突发环境噪声降噪装置的整机产品，同样也具有本发明降低间歇性突发环境噪声的电力设备声级测量方法的前述优点，在此不再赘述。The intermittent sudden environmental noise noise reduction device for measuring the sound level of electrical equipment according to the present invention is a device corresponding to the method for measuring the sound level of electrical equipment for reducing intermittent sudden environmental noise according to the present invention, and it also has the function of reducing the intermittent sudden environmental noise according to the present invention. The aforementioned advantages of the method for measuring the sound level of a noise electrical equipment are not repeated here. The power equipment sound level measuring device of the present invention is a complete product including the intermittent sudden environmental noise noise reduction device for the power equipment sound level measurement of the present invention, and also has the power equipment sound level measurement for reducing intermittent sudden environmental noise according to the present invention. The aforementioned advantages of the method are not repeated here.
附图说明Description of drawings
图1为本发明实施例一方法的基本流程示意图。FIG. 1 is a schematic diagram of a basic flow of a method according to
图2为本发明实施例一含有间歇性突发环境噪声的声信号的时域波形图。FIG. 2 is a time domain waveform diagram of an acoustic signal containing intermittent sudden environmental noise according to
图3为本发明实施例一含有间歇性突发环境噪声的声信号的时频分解图。FIG. 3 is a time-frequency decomposition diagram of an acoustic signal containing intermittent sudden environmental noise according to
图4为本发明实施例一实际声信号与还原出的纯净的声信号的时域波形对比图。FIG. 4 is a time-domain waveform comparison diagram of an actual acoustic signal and a restored pure acoustic signal according to
图5为本发明实施例一装置的结构示意图。FIG. 5 is a schematic structural diagram of an apparatus according to an embodiment of the present invention.
图6为本发明实施例二装置的结构示意图。FIG. 6 is a schematic structural diagram of a device according to
具体实施方式Detailed ways
实施例一：Example 1:
参见图1，本实施例电力设备声级测量的间歇性突发环境噪声降噪方法的实施步骤包括：Referring to FIG. 1 , the implementation steps of the intermittent sudden environmental noise reduction method for sound level measurement of power equipment in this embodiment include:
1）获取电力设备的声信号；1) Obtain the acoustic signal of the power equipment;
2）针对电力设备的声信号进行多层时频分解；2) Multi-layer time-frequency decomposition for the acoustic signal of power equipment;
3）查找多层时频分解得到的各个分解频带中环境噪声的突发点；3) Find the burst point of environmental noise in each decomposed frequency band obtained by multi-layer time-frequency decomposition;
4）针对多层时频分解得到的各个分解频带，判断每个分解频带中第一个突发点之前是否具有满足预设长度条件的声信号，如果每个分解频带中第一个突发点之前均具有满足预设长度条件的声信号，则跳转执行步骤5）；否则，结束并退出；4) For each decomposition frequency band obtained by multi-layer time-frequency decomposition, determine whether there is an acoustic signal that meets the preset length condition before the first burst point in each decomposition frequency band. If the first burst point in each decomposition frequency band If there is an acoustic signal that meets the preset length condition before, jump to step 5); otherwise, end and exit;
5）针对多层时频分解得到的各个分解频带，利用计算功率谱差与反向傅里叶变换方法还原出各个分解频带的纯净的声信号；5) For each decomposed frequency band obtained by multi-layer time-frequency decomposition, the pure acoustic signal of each decomposed frequency band is restored by calculating the power spectrum difference and the inverse Fourier transform method;
6）根据各个分解频带的纯净的声信号还原出电力设备的纯净的声信号。6) Restore the pure acoustic signal of the power equipment according to the pure acoustic signal of each decomposition frequency band.
在得到电力设备的纯净的声信号后，即可根据电力设备的纯净的声信号进行声级计算、并将计算得到的声级输出。After the pure sound signal of the power equipment is obtained, the sound level can be calculated according to the pure sound signal of the power equipment, and the calculated sound level can be output.
本实施例中，步骤2）针对电力设备的声信号进行多层时频分解具体是指针对电力设备的声信号采用小波包分解算法进行多层时频分解；步骤3）查找多层时频分解得到的各个分解频带中环境噪声的突发点时，具体是指对小波分解的第1层细节系数查找该分解频带中环境噪声的突发点。本实施例中，进行多层时频分解具体是指进行3层时频分解，分解层数根据电力设备声信号的采样频率确定，最终得到8个分解频带，电力设备声信号采样频率为22.05kHz，采样时间3s。含有间歇性突发环境噪声的电力设备声信号s m的时域波形图如图2所示。含有间歇性突发环境噪声的电力设备声信号的时频分解结果如图3所示。In this embodiment, step 2) performing multi-layer time-frequency decomposition on the acoustic signal of the power equipment specifically refers to using the wavelet packet decomposition algorithm to perform the multi-layer time-frequency decomposition on the acoustic signal of the power equipment; step 3) searching for the multi-layer time-frequency decomposition When obtaining the burst points of environmental noise in each decomposed frequency band, it specifically refers to finding the burst points of environmental noise in the decomposed frequency band from the first-level detail coefficients of the wavelet decomposition. In this embodiment, performing multi-layer time-frequency decomposition specifically refers to performing three-layer time-frequency decomposition, the number of decomposition layers is determined according to the sampling frequency of the acoustic signal of the power equipment, and finally 8 decomposition frequency bands are obtained, and the sampling frequency of the acoustic signal of the power equipment is 22.05 kHz , the sampling time is 3s. The time domain waveform diagram of the acoustic signal s m of the power equipment with intermittent sudden environmental noise is shown in Figure 2. The time-frequency decomposition result of the acoustic signal of the power equipment with intermittent sudden environmental noise is shown in Figure 3.
本实施例中，步骤4）中预设长度条件的声信号具体是指大于或等于0.5s时间长度的声信号。步骤3）中判断每个分解频带中第一个突发点之前是否具有0.5s时间长度的电力设备声信号，如果声信号长度不足0.5s，则退出重新测量声信号。In this embodiment, the acoustic signal of the preset length condition in step 4) specifically refers to an acoustic signal with a time length greater than or equal to 0.5s. In step 3), it is judged whether there is an electric equipment acoustic signal with a time length of 0.5s before the first burst point in each decomposed frequency band.
本实施例中，步骤5）的详细步骤包括：In this embodiment, the detailed steps of step 5) include:
5.1）针对多层时频分解得到的各个分解频带遍历选择一个分解频带作为当前分解频带；5.1) For each decomposition frequency band obtained by multi-layer time-frequency decomposition, select a decomposition frequency band as the current decomposition frequency band;
5.2）计算当前分解频带第一个突发点之前声信号的功率谱P t(ω)、当前分解频带的功率谱P y(ω)，将当前分解频带的功率谱P y(ω)减去当前分解频带第一个突发点之前声信号的功率谱P t(ω)得到当前分解频带的功率谱差P s(ω)= P y (ω)-P t(ω)；5.2) Calculate the power spectrum P t ( ω ) of the acoustic signal before the first burst point of the current decomposition frequency band, and the power spectrum P y ( ω ) of the current decomposition frequency band, and subtract the power spectrum P y ( ω ) of the current decomposition frequency band. The power spectrum P t ( ω ) of the acoustic signal before the first burst point of the current decomposition frequency band obtains the power spectrum difference P s ( ω ) = P y ( ω ) - P t ( ω ) of the current decomposition frequency band;
5.3）根据当前分解频带的功率谱差P s(ω)计算当前分解频带的幅度谱Y s(ω)；5.3) Calculate the amplitude spectrum Y s ( ω ) of the current decomposition frequency band according to the power spectrum difference P s ( ω ) of the current decomposition frequency band;
5.4）对当前分解频带的幅度谱Y s(ω)进行反向傅里叶变换，还原出当前分解频带的环境噪声信号s(t)；5.4) Perform inverse Fourier transform on the amplitude spectrum Y s ( ω ) of the current decomposed frequency band, and restore the environmental noise signal s ( t ) of the current decomposed frequency band;
5.5）将当前分解频带的时域信号y(t)中减去s(t)，得出当前分解频带的纯净的声信号n(t)；5.5) Subtract s ( t ) from the time domain signal y (t) of the current decomposed frequency band to obtain the pure acoustic signal n ( t ) of the current decomposed frequency band;
5.6）判断分解频带是否遍历完毕，如果尚未遍历完毕，则遍历选择下一个分解频带作为当前分解频带，跳转执行步骤5.2）；否则，跳转执行步骤6）。5.6) Determine whether the traversal of the decomposed frequency band has been completed. If the traversal has not been completed, the traversal selects the next decomposed frequency band as the current decomposed frequency band, and jumps to step 5.2); otherwise, jumps to step 6).
本实施例中，步骤6）中根据各个分解频带的纯净的声信号还原出电力设备的纯净的声信号具体是指将各个分解频带的纯净的声信号相加得到电力设备的纯净的声信号。In this embodiment, in step 6), restoring the pure acoustic signal of the electric equipment according to the pure acoustic signal of each decomposed frequency band specifically refers to adding the pure acoustic signals of each decomposed frequency band to obtain the pure acoustic signal of the electric equipment.
本实施例中，实际电力设备的声信号s 1与还原出的纯净电力设备声信号p t时域波形图如图4所示。二者时域波形具有很高的一致性，经分析，二者频谱相关系数约为1.0。经过声压级计算，含有间歇性突发环境噪声的电力设备声信号s m声级为63.1 dB(A)，实际电力设备声信号s 1声级为59.8 dB(A)，还原出的纯净电力设备声信号p t声压级为59.5 dB(A)，与实际电力设备声信号s 1声级仅相差0.3 dB(A)，若直接进行声级检测则误差为3.3 dB(A)。本发明显著提高了含有间歇性突发环境噪声时电力设备声级测量精度，降低了环境噪声对电力设备声级测量结果的干扰。In this embodiment , the time-domain waveform diagrams of the acoustic signal s 1 of the actual power equipment and the restored acoustic signal pt of the pure power equipment are shown in FIG. 4 . The time-domain waveforms of the two have high consistency. After analysis, the spectral correlation coefficient of the two is about 1.0. After the sound pressure level calculation, the sound level of the sound signal s m of the power equipment containing intermittent sudden environmental noise is 63.1 dB(A), and the sound level of the actual sound signal s 1 of the power equipment is 59.8 dB(A). The restored pure electric power The sound pressure level of the equipment sound signal pt is 59.5 dB(A), which is only 0.3 dB(A) different from the sound level of the actual power equipment sound signal s 1. If the sound level is detected directly, the error is 3.3 dB(A). The invention significantly improves the sound level measurement accuracy of the power equipment when the intermittent sudden environmental noise is contained, and reduces the interference of the environmental noise on the sound level measurement result of the power equipment.
本实施例还提供一种电力设备声级测量的间歇性突发环境噪声降噪装置，包括计算机设备，该计算机设备被编程以执行本实施例的电力设备声级测量的间歇性突发环境噪声降噪方法的步骤，该计算机设备可以是常规的计算机设备，也可以是嵌入式计算机设备。This embodiment also provides an intermittent sudden environmental noise noise reduction device for sound level measurement of electrical equipment, including a computer device programmed to perform the intermittent sudden environmental noise for electrical equipment sound level measurement of this embodiment In the steps of the noise reduction method, the computer device may be a conventional computer device or an embedded computer device.
如图5所示，本实施例还提供一种电力设备声级测量装置，包括依次相连的传声器1、前置放大器2和声级计本体3，前置放大器2和声级计本体3之间连接有前述的电力设备声级测量的间歇性突发环境噪声降噪装置（图5中的部件A）。声级计本体3在得到部件A）输出的电力设备的纯净的声信号后，可根据电力设备的纯净的声信号进行声级计算、并将计算得到的声级输出。本实施例实质上是在传统的前置放大器2和声级计本体3之间连接了一个嵌入式的降噪处理设备（间歇性突发环境噪声降噪装置），该降噪处理设备编程以执行本实施例降低间歇性突发环境噪声的电力设备声级测量方法的步骤，以降低间歇性突发环境噪声。本实施例是一种针对传统声级计的改造方案，能够适用于各种现有的声级计的设备改造，具有改造价格低廉、适用范围广泛的优点。As shown in FIG. 5 , the present embodiment also provides a sound level measuring device for electrical equipment, including a
实施例二：Embodiment 2:
本实施例与实施例一基本相同，其主要不同点为：本实施例电力设备声级测量装置的结构有所不同，本实施例中的电力设备声级测量装置为全新的集成式声级计。This embodiment is basically the same as the first embodiment, and the main difference is that the structure of the sound level measuring device of electric equipment in this embodiment is different, and the sound level measuring device of electric equipment in this embodiment is a brand-new integrated sound level meter .
如图6所示，本实施例的电力设备声级测量装置包括依次相连的传声器1、前置放大器2和声级计本体3，声级计本体3被编程以执行电力设备声级测量的间歇性突发环境噪声降噪方法（详见实施例一）的步骤，声级计本体3直接将原始的电力设备的声信号进行降噪获得电力设备的纯净的声信号，再根据电力设备的纯净的声信号进行声级计算、并将计算得到的声级输出，本实施例的方式能够通过提高集成度降低声级计整体价格，适用于新声级计。As shown in FIG. 6 , the apparatus for measuring the sound level of electrical equipment in this embodiment includes a
以上所述仅是本发明的优选实施方式，本发明的保护范围并不仅局限于上述实施例，凡属于本发明思路下的技术方案均属于本发明的保护范围。应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理前提下的若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。The above are only the preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions under the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.
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