- voice frequency system
- 话频制
English-Chinese electricity dictionary (电气专业词典). 2013.
voice frequency system
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Voice frequency — A voice frequency (VF) or voice band is one of the frequencies, within part of the audio range, that is used for the transmission of speech. In telephony, the usable voice frequency band ranges from approximately 300 Hz to 3400 Hz. It is for this … Wikipedia
voice-frequency signal system — garso dažnių signalų sistema statusas T sritis radioelektronika atitikmenys: angl. voice frequency signal system vok. Tonfrequenzsystem, n rus. система сигналов звуковых частот, f pranc. système à signaux tonals, m … Radioelektronikos terminų žodynas
Frequency-division multiplexing — (FDM) is a form of signal multiplexing where multiple baseband signals are modulated on different frequency carrier waves and added together to create a composite signal. Non telephoneFDM can also be used to combine multiple signals before final… … Wikipedia
Voice procedure — includes various techniques used to clarify, simplify and standardize spoken communications over two way radios, in use by the military, in civil aviation, police and fire dispatching systems, citizens band radio (CB), etc. Voice procedure… … Wikipedia
Voice stress analysis — (VSA) technology is said to record psychophysiological stress responses that are present in human voice, when a person suffers psychological stress in response to a stimulus (question) and where the consequences may be dire for the subject being… … Wikipedia
Voice inversion — scrambling is an analog method of obscuring the content of a transmission. It sometimes used in public service radio, automobile racing, cordless telephones and the Family Radio Service. Without a descrambler, the transmission makes the speaker… … Wikipedia
System of Cooperation Among the American Air Forces — SICOFAA emblem Active 1961 Current Country Argentina, Belize … Wikipedia
Human voice — Voice redirects here. For other uses, see Voice (disambiguation). The spectrogram of the human voice reveals its rich harmonic content. The human voice consists of sound made by a human being using the vocal folds for talking, singing, laughing … Wikipedia
Voice coil — A voice coil (consisting of a bobbin, collar and winding) is the coil of wire attached to the apex of the cone of a loudspeaker. It provides the motive force to the cone by the reaction of a magnetic field to the current passing through it. The… … Wikipedia
Frequency modulation — See also: Amplitude modulation In telecommunications, frequency modulation (FM) conveys information over a carrier wave by varying its frequency (contrast this with amplitude modulation, in which the amplitude of the carrier is varied while its… … Wikipedia
Frequency management challenges in military forces — Every military force has a goal to ensure and have permanent access in the spectrum of radio frequencies to meet its vital military tasks. This is based on strategies, doctrines and different policies that military forces adhere to.The nature of… … Wikipedia
