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In alternating current, the zero crossing is the instantaneous point at which there is no voltage present. This normally occurs twice during each cycle, and is the time at which there is the least electrical noise.

The zero crossing is important for systems which send digital data over AC circuits, such as X.10 home automation control systems, and Digital Command Control type systems for Lionel and other AC model trains. This low noise period, occurring 100 or 120 times per second, allows the signal to be sent with the least chance of being corrupted.

Zero crossing is also a method used in speech processing to estimate formants of speech.

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Topics: Zero Crossing, Zero sum, Zeroth, Zero bit Insertion, Zero DBm...

Zero-sumZero-sum describes a situation in which a participant's gain (or loss) is exactly balanced by the losses (or gains) of the other participant(s). It is so named because when you add up the total gains of the participants and subtract the total losses then	ZerothThe zeroth item is the initial item of a sequence, if that sequence is numbered beginning from zero rather than one. In that case, when using the word "first", it should be made clear whether the common meaning "initial" is meant, or the special meaning "	Zero-bit insertionZero-bit insertion is a bit-stuffing technique used in data transmission protocols to ensure that six consecutive "1" bits never appear between the two flags that define the beginning and the ending of a transmission frame. When five consecutive "1" bits
Zero dBm transmission level pointZero dBm transmission level point (0 dBm TLP): In a communication system, a point at which the reference level is 1 mW, i. Note: The actual power level of the communications traffic is not necessarily 0 dBm. It is usually below the reference level. The re	Zero-dispersion slopeZero-dispersion slope In a single-mode optical fiber, the rate of change of dispersion, with respect to wavelength, at the fiber's zero-dispersion wavelength. Note 1: In silica-based optical fibers, the zero-dispersion wavelength occurs at approximately 1	Zero-dispersion wavelengthIn telecommunication, the term zero-dispersion wavelength has the following meanings: 1. In a single-mode optical fiber, the wavelength or wavelengths at which material dispersion and waveguide dispersion cancel one another. Note: In all silica-based opti
Zero Wing	Zero divisor	Zero-coupon bond
Zero-point energy	Zéro de Conduite	Zero-ists
Zero-player game	Zero sharp	Zeroth law of thermodynamics

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