Seen here, the waves combine into a square wave with it looking squarer as I add more and more signals that are multiples of the main frequency called harmonics.

Stationary-wave integrated Fourier-transform spectrometry (SWIFTS)—an approach based on direct intensity detection of a standing wave resulting from either reflection (as in the principle of ...

PURPOSETo make a direct comparison between Fourier and Zernike reconstructions of ocular wavefronts using a newly available analytical theory by which Fourier coefficients can be converted to ...

FOURIER ANALYSIS The representation of a PERIODIC sound or WAVEFORM as a sum of Fourier components (i.e. pure SINUSOIDAL WAVE s). According to the FOURIER THEOREM, periodic sound may be shown to ...