public void ApplyTest()
{
int n = 16384;
int sampleRate = 1000;
double f1 = 22;
double f2 = 300;
Signal cosine = new CosineGenerator(f1, 1, sampleRate).Generate(n);
Signal sine = new SineGenerator(f2, 1, sampleRate).Generate(n);
var merge = new AddFilter(cosine);
merge.Normalize = true;
Signal original = merge.Apply(sine);
var of1 = FindFrequencyCount(sampleRate, original, f1);
var of2 = FindFrequencyCount(sampleRate, original, f2);
Assert.AreEqual(2.1919473889115457E-05, of1, 1e-8);
Assert.AreEqual(2.9269612275882952E-05, of2, 1e-8);
Signal lowFiltered1 = new LowPassFilter(f1, sampleRate).Apply(original);
Signal lowFiltered2 = new LowPassFilter(f2, sampleRate).Apply(original);
Signal highFiltered1 = new HighPassFilter(f1, sampleRate).Apply(original);
Signal highFiltered2 = new HighPassFilter(f2, sampleRate).Apply(original);
var lf11 = FindFrequencyCount(sampleRate, lowFiltered1, f1);
var lf12 = FindFrequencyCount(sampleRate, lowFiltered1, f2);
Assert.AreEqual(1.5008301894378632E-05, lf11, 1e-8); // should be higher
Assert.AreEqual(2.33561994410787E-06, lf12, 1e-8);
Assert.IsTrue(lf11 > lf12);
var lf21 = FindFrequencyCount(sampleRate, lowFiltered2, f1);
var lf22 = FindFrequencyCount(sampleRate, lowFiltered2, f2);
Assert.AreEqual(2.1754311480113727E-05, lf21, 1e-8); // should not have much difference
Assert.AreEqual(1.6551627449395776E-05, lf22, 1e-8);
var hf11 = FindFrequencyCount(sampleRate, highFiltered1, f1);
var hf12 = FindFrequencyCount(sampleRate, highFiltered1, f2);
Assert.AreEqual(1.4979563644182712E-05, hf11, 1e-8); // should not have much difference
Assert.AreEqual(2.7342436340623498E-05, hf12, 1e-8);
var hf21 = FindFrequencyCount(sampleRate, highFiltered2, f1);
var hf22 = FindFrequencyCount(sampleRate, highFiltered2, f2);
Assert.AreEqual(1.5938293048394034E-06, hf21, 1e-8);
Assert.AreEqual(1.420896515288728E-05, hf22, 1e-8); // should be higher
Assert.IsTrue(hf22 > hf21);
Assert.AreEqual(16384, cosine.Duration.TotalMilliseconds);
Assert.AreEqual(16384, sine.Duration.TotalMilliseconds);
Assert.AreEqual(16384, original.Duration.TotalMilliseconds);
}
public void ApplyTest()
{
int n = 16384;
int sampleRate = 1000;
double f1 = 22;
double f2 = 300;
Signal cosine = new CosineGenerator(f1, 1, sampleRate).Generate(n);
Signal sine = new SineGenerator(f2, 1, sampleRate).Generate(n);
var merge = new AddFilter(cosine);
merge.Normalize = true;
Signal original = merge.Apply(sine);
var of1 = FindFrequencyCount(sampleRate, original, f1);
var of2 = FindFrequencyCount(sampleRate, original, f2);
Assert.AreEqual(0.359128660199268, of1, 1e-8);
Assert.AreEqual(0.47955332752802149, of2, 1e-8);
Signal lowFiltered1 = new LowPassFilter(f1, sampleRate).Apply(original);
Signal lowFiltered2 = new LowPassFilter(f2, sampleRate).Apply(original);
Signal highFiltered1 = new HighPassFilter(f1, sampleRate).Apply(original);
Signal highFiltered2 = new HighPassFilter(f2, sampleRate).Apply(original);
var lf11 = FindFrequencyCount(sampleRate, lowFiltered1, f1);
var lf12 = FindFrequencyCount(sampleRate, lowFiltered1, f2);
Assert.AreEqual(0.24589601823749971, lf11, 1e-8); // should be higher
Assert.AreEqual(0.038266797164259778, lf12, 1e-8);
Assert.IsTrue(lf11 > lf12);
var lf21 = FindFrequencyCount(sampleRate, lowFiltered2, f1);
var lf22 = FindFrequencyCount(sampleRate, lowFiltered2, f2);
Assert.AreEqual(0.35642263929018364, lf21, 1e-8); // should not have much difference
Assert.AreEqual(0.271181864130875, lf22, 1e-8);
var hf11 = FindFrequencyCount(sampleRate, highFiltered1, f1);
var hf12 = FindFrequencyCount(sampleRate, highFiltered1, f2);
Assert.AreEqual(0.24542517074628975, hf11, 1e-8); // should not have much difference
Assert.AreEqual(0.44797847700473359, hf12, 1e-8);
var hf21 = FindFrequencyCount(sampleRate, highFiltered2, f1);
var hf22 = FindFrequencyCount(sampleRate, highFiltered2, f2);
Assert.AreEqual(0.026113299330488803, hf21, 1e-8);
Assert.AreEqual(0.23279968506488344, hf22, 1e-8); // should be higher
Assert.IsTrue(hf22 > hf21);
Assert.AreEqual(16384, cosine.Duration.TotalMilliseconds);
Assert.AreEqual(16384, sine.Duration.TotalMilliseconds);
Assert.AreEqual(16384, original.Duration.TotalMilliseconds);
}