A sine curve or
sine wave (
Sinusoid /
Sine wave ) is a curve derived from a sine ratio in a mathematical trigonometric function. It is also a representative of analog signals, as opposed to square waves, which represent digital signals.
The sine curve can be expressed as y = Asin (x + ) + k, which is defined as the function y = Asin (x + ) + k in
The shape of a sine curve is like a perfect sea wave, which is formed by changing the sine proportion of the trigonometric function.
(1) The sine function is a wavy line. When x R, it will intersect the x axis but not necessarily (0,0).
(2) in
The appearance and application of sine curves are very extensive and can often be seen in research and used in:
Signal processing for analog signals
Simple harmonic motion
Acoustic sound air vibration
Vibration wave of musical instrument tuning fork
Output of the frequency generator
AC voltage changes
and many more.
Even other irregular and non-sinusoidal waves can be represented by a collection of sine waves with different periods and amplitudes. This type of technology that transforms complex bands into sine waves is called Fourier analysis.
