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首页> 外文期刊>Canadian acoustics >Nose conedevice and built-in calibration check as essenti al features of a standalone instrument for unattended mid- And long-term noise measurements
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Nose conedevice and built-in calibration check as essenti al features of a standalone instrument for unattended mid- And long-term noise measurements

机译：鼻锥装置和内置校准检查是独立仪器的基本功能，可用于无人值守的中长期噪声测量

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The article examines how the nose cone device and built-in calibration check are essential features of a stand alone instrument for unattended mid- and long-term noise measurements. Environmental noise generated by ground transportation, construction sites or recreational activities, is coming from all directions, and such multiple sources are usually located at random positions with respect to the measurement point. JEC 61672-1 gives directional response requirements for the configuration of a sound level meter as stated in the instruction manual for the normal mode of operation or for those components of a sound level meter that are intended to be located in a sound field. In unattended noise measurement situations, the direction from the source is generally unknown. Apart from aircraft noise, the sources are located on the ground. Taking into account the acoustic front end design at the early stage of the development allowed determining and optimizing the constraints: position of the microphone, shape of the body of the sound level meter, cone and wind screens characteristics.
机译：本文探讨了鼻锥设备和内置校准检查如何成为独立仪器用于无人值守的中长期噪声测量的基本功能。地面交通，建筑工地或娱乐活动所产生的环境噪声来自各个方向，并且这种多个源通常位于相对于测量点的随机位置。 JEC 61672-1给出了声压计的配置的方向响应要求，如正常操作模式或使用说明书中规定的声压计的配置，或旨在放置在声场中的那些组件。在无人值守的噪声测量情况下，从声源指向的方向通常未知。除飞机噪音外，声源都位于地面上。考虑到开发初期的声学前端设计，可以确定和优化约束条件：麦克风的位置，声级计的主体形状，锥体和挡风玻璃的特性。

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