- spectral frequency
- 谱频率
English-Chinese dictionary of mechanical engineering (英汉机械工程大词典). 2013.
spectral frequency
Look at other dictionaries:
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 band — noun a band of adjacent radio frequencies (e.g., assigned for transmitting radio or television signals) • Syn: ↑waveband • Topics: ↑television, ↑telecasting, ↑TV, ↑video • Hypernyms: ↑ … Useful english dictionary
Spectral efficiency — Spectral efficiency, spectrum efficiency or bandwidth efficiency refers to the information rate that can be transmitted over a given bandwidth in a specific communication system. It is a measure of how efficiently a limited frequency spectrum is… … Wikipedia
Spectral leakage — is an effect in the frequency analysis of signals where small amounts of signal energy are observed in frequency components that do not exist in the original waveform. The term leakage refers to the fact that it appears as if some energy has… … Wikipedia
Spectral band replication — (SBR) is a technology to enhance audio or speech codecs, especially at low bit rates and is based on harmonic redundancy in the frequency domain.It can be combined with any audio compression codec: the codec itself transmits the lower and… … Wikipedia
Spectral method — Spectral methods are a class of techniques used in applied mathematics and scientific computing to numerically solve certain Dynamical Systems, often involving the use of the Fast Fourier Transform. Where applicable, spectral methods have… … Wikipedia
Spectral sensitivity — is the relative efficiency of detection, of light or other signal, as a function of the frequency or wavelength of the signal.In visual neuroscience, spectral sensitivity is used to describe the different characteristics of the photopigments in… … Wikipedia
Spectral modelling synthesis — Spectral Modeling Synthesis or simply SMS is an Acousic modeling approach for speech and other signals.SMS considers sounds as a combination of harmonic content and noise content. Harmonic components are identified based on peaks in the frequency … Wikipedia
Spectral Induced Polarisation — (SIP) is an extension of Induced Polarisation (IP), being itself an extension of DC geoelectric. SIP measures the frequency dependent (i.e. spectral) complex impedance, equivalent to the amount of resistance and phase shift between electrical… … Wikipedia
Spectral analysis — may refer to:* Spectrum analysis, in physics, a method of analyzing the chemical properties of matter from bands in their optical spectrum * Spectral theory, in mathematics, a theory that extends eigenvalues and eigenvectors to linear operators… … Wikipedia
Spectral mutability — is a desired capabilityClarifyme|date=August 2008 where RF systems have the appropriate mix of both manual and automatic flexibility and agility to affect all aspects of their operating parameters (e.g. waveform, bandwidth, power, frequency,… … Wikipedia
