1、

? sults show that the hearing loss in group 1 caused by low frequency noise was slight and the audibility of the ani-mals recovered in 24~ 48h after exposure, whereas the hearing loss caused by narrow band noise was more marked-ly than the above;

结果表明,第1组动物由低频噪声引起的听力损失轻,暴露后24~48h听力恢复正常,窄带噪声引起的听力损失较前者重;

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2、

Acoustics& Reference zero for the calibration of audiometric equipment Part 4: Reference levels for narrow-band masking noise

GB/T4854.4-1999声学校准测听设备的基准零级第4部分:窄带掩蔽噪声的基准级

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3、

Acoustics Audiometric test methods Part 2: Sound field audiometry with pure tone and narrow-band test signals

GB/T16296-1996声学测听方法第2部分:用纯音及窄带测试信号的声场测听

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4、

Nothing can embellish a beautiful face more than a narrow band drawn over the brow.

除了一条横束额上的细带而外,没有别的东西能把美丽的面庞衬托得更好的了.

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5、

The two ultra-high frequency outer antenna sensors are made with wide band and narrow band respectively. The gain of two sensors is both greater than 1 and VSWR of the sensors is less than 2 in effective bandwidth range.

研制了宽带和窄带两种超高频外置天线传感器,两种传感器增益均大于1,驻波比在其有效带宽范围内均小于2,均能用于GIS局部放电超高频检测。

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