Amplitude: The strength or intensity of an AC signal applied by the amplifiers output to a speaker's input. Also, a measure of the relative power of any variable recurring phenomenon. Typically, measurements are made in Decibels.

 

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Amplitude: The strength or intensity of an AC signal applied by the amplifiers output to a speaker's input. Also, a measure of the relative power of any variable recurring phenomenon. Typically, measur . . . View Full Definition

Amplitude Contrast Ratio: For a weak phase, weak amplitude object, the ratio Qo between the contrast transferred by cos(gamma) and sin(gamma) is called amplitude contrast ratio. It is different for different atoms, a . . . View Full Definition

Amplitude Correction: correction of the 3D Fourier amplitudes of the EM density map after angular refinement. This correction can be based on an analytical formula, namely by application of a temperature factor w . . . View Full Definition

Amplitude Modulation (AM): In radio broadcasting, amethod of modulation in which the amplitude of the carrier voltage is varied in proportion to the changing frequency value of an applied (audio) voltage.

Quadrature Amplitude Modulation (QAM): A method of modulating digital signals using both amplitude and phase coding. Used for downstream and can be used for upstream.

Amplitude (H): One-half the range of a constituent tide. By analogy, it may be applied also to the maximum speed of a constituent current.

K2: Lunisolar semi diurnal constituent. This constituent modulates the amplitude and frequency of M2 and S2 for the declinational effect of the Moon and Sun, respectively. Speed = 2T + 2h = 30.0 . . . View Full Definition

Indian Spring Low Water: A datum originated by Professor G. H. Darwin when investigating the tides of India. It is an elevation depressed below mean sea level by an amount equal to the sum of the amplitudes of he ha . . . View Full Definition

L2: Smaller lunar elliptic semi diurnal constituent. This constituent, with N2, modulates the amplitude and frequency of M2 for the effect of variation in the Moon's orbital speed due to its ell . . . View Full Definition

Lambda (82): Smaller lunar evectional constituent. This constituent, with <2, :2, and (S2), modulates the amplitude and frequency of M2 for the effects of variation in solar attraction of the Moon. This . . . View Full Definition