| 单词 | VLF |
| 释义 |
VLF
英汉-汉英词典
abbr. 超低频（Very Low Frequency）
词组 | 习惯用语
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VLF dual trace oscilloscope 甚低频二踪示波器 网络短语:VLF communication 特低频通信；甚低频通信 VLF receiver 甚低频接收机; 甚低频接受器; VLF radio wave 甚低频电磁波 multiple frequency VLF technique 多频甚低频技术 VLF radio wave propagation 甚低频无线电波传输 vlf radiation 甚低频辐射 VLF Station 空气层流立式工作台 Magnus VLF 柯达超胜 VLF VeryLargeDataBase 极大型数据库 vlf emission 甚低频发射
中文百科
甚低频 Very low frequency（重定向自VLF）
甚低频（VLF, Very low frequency）是指频带由3KHz到30 KHz的无线电波。 VLF多数用作潜艇通信、无线心跳频率检测器及地球物理学研究等。另外对于雪崩时的人命及财产搜索，VLF亦起了一定的作用。 无线电波名 极低频 超低频 特低频 甚低频
英语百科
Very low frequency 甚低频（重定向自VLF）
    Very low frequency or VLF is the ITU designation for radio frequencies (RF) in the range of 3 kHz to 30 kHz and wavelengths from 10 to 100 kilometres. Due to its limited bandwidth, audio (voice) transmission is highly impractical, and therefore, only low data rate coded signals are used. The VLF band is used for a few radio navigation services, government time radio stations (broadcasting time signals to set radio clocks) and for secure military communication. Since VLF waves penetrate about 40 meters into saltwater, they are used for military communication with submarines. The band is also known as the myriametre band or myriametre wave as the wavelengths range from one to ten myriametres (an obsolete metric unit equal to 10 kilometres).
近义、反义、联想词
近义词n.radio frequency 联想词
英英词典
vlf n.
synonymous： very low frequency |
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