Measurement of sound level manner null of suffering measurementPURPOSE: To measure the noise of the traveling motor, i.e., a brushless motor, for an inverter driven electric automobile through a simple constitution without driving through the inverter.金子 大蔵...
;CONSTITUTION: Regarding a noise measurement system to obtain a time average noise level of measured noise; connections of microphones 1 installed in a plurality of points in a measurement chamber 23 with measuring instruments 7 (a logarithmic amplifier, a sound level meter, an acoustic analyzer, ...
method for measurement of sound pressure level 青云英语翻译 请在下面的文本框内输入文字,然后点击开始翻译按钮进行翻译,如果您看不到结果,请重新翻译! 翻译结果1翻译结果2翻译结果3翻译结果4翻译结果5 翻译结果1复制译文编辑译文朗读译文返回顶部 声压级的测量方法...
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satisfactory level of support and backstopping through sound management of financial resources, normal [...] unesdoc.unesco.org 在本双年度期 间,尽管连续的零名义增长预算带来了预算与资金的严重拮据(包括人力),但支助服务机构依然提供了令人 满意的支助,这得助于如下工作:如财政资 源 的 合 理 管 理...
True Peak Level The true peak level shows the real peak value of the input signal in dB (decibel). Thesound pressure level (SPL)always contains a time weighting filter, which has an influence on the peak value. The sound pressure level does not reach that high value, no matter if we ...
ISO15186系列标准还包括其他部分,如ISO15186-2:2000ENAcoustics—Measurementofsoundtransmissioninbuildingsandbuildingelementsusingsoundpressure(使用声压测量建筑物和建筑元素的传声性能)和ISO15186-3:2000ENAcoustics—Measurementofsoundinsulationinbuildingsusingnoiselevel(使用噪声水平测量建筑物内的隔音性能)。这些标准提供了...
and by the inherent noise level of the measuring equipment shall be at least 10 dB below the A-weighted sound pressure levels of the vehicle noise. 7.5 The ambient air temperature, in which the vehicle is operating, shall be in the range −5 °C to +35 °C (23 °F to ...
Six months of continuous measurement of one-hour average sound levels, one mile sidewise from NAS Miramar, San Diego 来自 Semantic Scholar 喜欢 0 阅读量: 10 作者: RW Young 摘要: From 18 July 1994 to 17 December 1994, 1‐h average sound level was measured continuously by Computer ...
Ultrasoniclevel instruments measure the distance from the transmitter (located at some high point) to the surface of a process material located farther below using reflected sound waves. The frequency of these waves extend beyond the range of human hearing, which is why they are calledultrasonic. ...