. "trigonometric functions" . . . . "Fourier spectrum" . . . "Fourier analysis and synthesis" . . . . "analyse the output wave into its constituent harmonics" . "Fourier sound analyzer" . . "Fourier synthesis" . . "Fourier analysis#Variants of Fourier analysis" . "Fourier analysis" . . "Fourier analysis" . "Fourier spectral analysis" . . "Fourier_analysis#History" . . "Fourier analysis/technique" . . "fourier analysis" . . "Fourier syntheses" . "Fourier component" . "Fourier_analysis#Variants_of_Fourier_analysis" . "Fourier transform" . "frequency components" . . "Fourier analyzer" . "Fourier-based" . . . . "Fourier-analytic" . . "invented in 1805 by Gauss" . "Fourier domain searches" . "Fourier" . "Fourier_analysis#Applications" . . . . . "Fourier frequency analysis" . . "complex sounds containing multiple tones" . "Euclidean Fourier analysis" . . "Fourier Analysis" . . . . "Fourier magnitude spectrum" .