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- This paper discussed the double sideband noise figures and single side band noise figures of the superheterodyne receivers in a ideal hypothesis and the practical case respectively. 分别讨论了在理想假设和实际情况下超外差接收机的双边带噪声系数和单边带噪声系数，给出了单边带接收机的某些设计方案。
- Reflected wide band noise current 反灌相对宽频杂音电流
- FM-PERCEPTION THRESHOLD OP NARROW BAND NOISE 窄带噪声的调频感受阈
- A Power Spectrum of Discontinuous Narrow Band Noise 间断窄带噪声的功率谱
- narrow band noise stimulus generator 窄带噪声刺激发生器
- partial band noise jamming (PBNJ) 部分频带噪声干扰
- Without a RF filter, B should be more than 9dB so that the out of band noises near the central frequency can achieve the DAB transmitting signal criterion. 在不加滤波器的情况下 ,离中心频率较近的带外噪声欲满足DAB发射信号频谱标准 ,B至少要在 9d B以上。
- He left when the band began to beat out pop music. 乐队一奏起流行音乐他就走了。
- The band played a military march. 乐队吹奏军队进行曲。
- A loud noise from the street diverted my attention. 街上一阵喧闹声转移了我的注意力。
- The out of band noises of Eureka 147 DAB (digital audio broadcasting) signals produced by HPA (high power amplifier) nonlinearities were analyzed to reduce the interference to adjacent channels. 为更好地抑制带外噪声 ,减小信道间的干扰 ,在对Eureka 147DAB(数字音频广播 )信号调制过程进行介绍后 ,从频谱扩展的角度分析了 HPA (高功率放大器 )对 DAB信号的影响。
- The noise awoke her from her revery. 这声音把我她从沉思中惊醒。
- That noise is driving me frantic. 那种噪音真要把我弄疯了。
- A live band is always a good draw at a party. 现场演奏的乐队在聚会上总是很吸引人的。
- He was waylaid by a band of guerrillas. 他遭到游击队的狙击。
- The thick walls deadened the noise from the street. 这道厚墙隔绝了街上的噪音。
- Radio2 can be heard on the long wave band. 第二广播电台可在长波段收听到。
- A noise abatement notice is served on the club. 向俱乐部发停止大声喧哗的通知。
- The noise of traffic grows louder and louder. 交通的噪音变得愈来愈大。
- The noise struck terror into their hearts. 那声音使他们心里产生恐惧。
