In this paper a microwave standardnoisesource which produces noise by healing a metal filament is described.
本文介绍了一种用加热金属丝来产生噪声的微波标准噪声源。
2
After a white noise signal has been taken as the input of a standard sound source, a static acoustic test is conducted for a prototype silencer without air flow and at the normal temperature.
采用白噪声信号作为标准声源的输入信号,在常温无气流条件下对消声器实物模型进行了静态放声试验。
3
A full band WR28 matched load immersed in the liquid nitrogen is served as the noise radiation source of the standard.