Manipulate[Plot [{Sin[w1/v1*x-w1*t]+Sin[w2/v2*x-w2*t]},{x,0,50Pi},PlotRange->2.,AxesLabel->{x,y}],{{v1,2,"v1"},2,4,Appearance->"Labeled"},
{{v2,2.1,"v2"},2,4,Appearance->"Labeled"},{{w1,1,"puls1"},0.333,3,Appearance->"Labeled"},
{{w2,1,"puls2"},0.333,3,Appearance->"Labeled"},{{t,0,"Tempo"},0,100,Appearance->"Labeled"}]