antiphase

Waves perfectly opposed

Antiphase describes waves or oscillations that are exactly out of step—when one reaches its peak, the other hits its trough.

Two signals in antiphase cancel each other out when combined.

The term appears in physics, electronics, and signal processing: The noise-canceling headphones work by generating sound waves in antiphase with ambient noise.

wave

crest

Highest point or tuft

wavelength · frequency · sinusoidal · periodic · vibration · propagation · interference · superposition · harmonic · transverse

opposition

opposite

Reverse or contrary thing

reversal · polarity · offset · counter · mirror · complementary · reciprocal · antipodal · contrary · inverted

physics

destructive interference

Waves combining to diminish amplitude

node · antinode · standing wave · amplitude · frequency · resonance · harmonics · diffraction · dispersion · polarization

electronics

noise suppression

Eliminating unwanted audio signals

oscillator · filter · modulation · bandwidth · attenuation · coupling · feedback · inverter · clock signal · timing

Opposites
phase relationship

antiphasein phase

Temporally aligned together

synchronized · coordinated · coherent · constructive · matched

Family

phase, emphasis, anti, phases, antipathy, antithesis, phased, phasing, metaphase

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Used worldwide · Timeless · Abstract · Rated G