I am trying to find the name for the value at the center of a sine wave $$ y(t) = A\sin (kx \pm \omega t+\varphi) + D $$ i.e. the offset $D$ of the wave in the $y$-direction. Wikipedia calls it Center Amplitude, but further googling this name is difficult and does not provide any further sources. I also found the expression Center Frequency, but I'm not sure that it refers to the same thing. Is there a commonly used name for the $y$-direction-offset of a sine wave?
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Googling "center amplitude" reveals page after page of articles that use the term in precisely the sense defined by Wikipedia. – TonyK Jun 01 '20 at 10:38
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1This looks like a duplicate of Name for the centre position of a sine wave. – TonyK Jun 01 '20 at 17:03
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In signal processing (more precisely in relation with Fourier analysis), it may be called average or mean value. In relationship with oscilloscopes, the steady component is called (DC) offset.
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