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building up sinusoid figure

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drowe67 2023-11-19 10:29:28 +10:30 • committed by David Rowe
parent ce5e8ba716
commit def80d4bf6
2 changed files with 18 additions and 17 deletions
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@ -2,7 +2,7 @@
\usepackage{amsmath}
\usepackage{hyperref}
\usepackage{tikz}
\usetikzlibrary{calc}
\usetikzlibrary{calc,arrows}
\usepackage{float}
\usepackage{xstring}
@ -75,34 +75,35 @@ A sinewave will cause a spike or spectral line on a spectrum plot, so we can see
\caption{The Sinusoidal speech model. If we sum a series of sine waves, we can generate speech.}
\label{fig:sinusoidal_model}
\begin{center}
\begin{tikzpicture}
\begin{tikzpicture}[>=triangle 45,x=1.0cm,y=1.0cm]
\newcommand{\DrawSine}[4]{% x, y, x_scale, y_scale
\begin{tikzpicture}
%\draw plot [smooth] coordinates {(#1,#2) (0.5,0.707) (1,1) (1.5,0.707) (2,0) (2.5,-0.707) (3,-1) (3.5,-0.707) (4,0)};
% draws little sine wave squiggle
\newcommand{\drawSine}[4]{% x, y, x_scale, y_scale
\draw plot [smooth] coordinates {(#1-2*#3, #2 ) (#1-1.5*#3,#2+0.707*#4)
(#1-1*#3, #2+1*#4) (#1-0.5*#3,#2+0.707*#4)
(#1 ,#2+0) (#1+0.5*#3,#2-0.707*#4)
(#1+1*#3,#2-1*#4) (#1+1.5*#3,#2-0.707*#4)
(#1+2*#3,#2+0)};
\end{tikzpicture}
(#1+2*#3,#2+0)}
}
%%\draw plot [smooth] coordinates {(0,0) (0.5,0.707) (1,1) (1.5,0.707) (2,0) (2.5,-0.707) (3,-1) (3.5,-0.707) (4,0)};
% three sine wave sources
\draw (0, 2.0) circle (0.5); \drawSine{0}{ 2.0}{0.2}{0.2};
\draw (0, 0.5) circle (0.5); \drawSine{0}{ 0.5}{0.2}{0.2};
\draw (0,-1.5) circle (0.5); \drawSine{0}{-1.5}{0.2}{0.2};
\DrawSine {0}{1}{0.5}{0.5}
\draw (0,2) circle (0.5);
\draw (0,0.5) circle (0.5);
\draw (0,-1.5) circle (0.5);
\draw (1,2) -- (2,2);
\draw (2.5,0.75) -- (2.5,1.5);
% summer
\draw (2.5,2) circle (0.5);
\draw (2.25,2) -- (2.75,2);
\draw (2.5,1.75) -- (2.5,2.25);
\draw (3,2) -- (4,2);
% connecting lines
\draw [->] (0.5,2) -- (2,2);
\draw [->] (0.45,0.7) -- (2.05,1.8);
\draw [->] (0.3,-1.1) -- (2.2,1.6);
% output
\draw [->] (3,2) -- (4,2);
\end{tikzpicture}