A suggested method to be used to measure scattering coefficients of full scale samples

机译：一种建议的用于测量满量程样品散射系数的方法

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In attempting to follow ISO 17497-11 as a method for measuring full-scale scattering coefficients, it was observed that many of the recommended steps needed to be modified for those full-scale measurements. Variations were tried to aid in these measurements. These variations are described, and suggested solutions to the problems observed are presented. It was observed that continuous rotation of the sample, rather than step action rotation, worked better for taking consistent data from the sample. Also, a stable chamber environment is necessary with humidity reaching at least 50% and temperature variations should not vary by more than 2 degrees Celsius throughout all four parts of the test. It was also observed that a less directional source than recommended was needed so two dodecahedron loudspeakers were chosen to reproduce a combined Weighted Noise stimulus source. Six data microphones were placed at random locations and varying heights to collect data. Data was compared between the suggested method and the ISO-17497-1 Standard.

机译：在尝试遵循ISO 17497-11作为测量满量程散射系数的方法时，发现对于那些满量程测量，许多建议的步骤都需要修改。尝试了各种变化以帮助进行这些测量。描述了这些变体，并提出了针对所观察到的问题的建议解决方案。可以观察到，样品的连续旋转比步进旋转更适合于从样品中获取一致的数据。同样，在整个测试的四个部分中，必须有一个稳定的腔室环境，湿度至少要达到50％，并且温度变化的变化不应超过2摄氏度。还观察到，所需方向性的信号比建议的要少，因此选择了两个十二面体扬声器来再现组合的加权噪声刺激源。将六个数据麦克风放置在随机位置和不同高度以收集数据。比较了建议方法和ISO-17497-1标准之间的数据。

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《Korean Society of Noise & Vibration Control;Institute of Noise Control Engineering;International congress and exposition on noise control engineering;ASME Noise Control & Acoustics Division 》|2015年|1-7|共7页
会议地点 San Francisco, CA(US)
作者
Ronald Sauro; Michael Vargas;
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NWAA Labs Inc 25132 Rye Canyon Loop Santa Clarita CA 91355 USA audio_ron@msn.com;

NWAA Labs Inc 25132 Rye Canyon Loop Santa Clarita CA 91355 USA michael.vargas@csun.edu;

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A suggested method to be used to measure scattering coefficients of full scale samples

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