The optimum design of the controller of compound active noise cancellation earmuff is discussed.
探讨了复合式有源消声耳罩的控制器的优化设计方法。
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Noise is another hazard. Working with noisy tools such as jackhammers requires proper, effective use of hearing protection. Ear plugs and earmuff type hearing protection is recommended.
L. f. noise can be better attenuated so as to obtain good attenuation characteristics over the entire audible frequency range by using active noise reduction technique in the closed-air type earmuff.