/// <summary>
/// 分析单音色波形
/// </summary>
/// <param name="waveform">测试波形</param>
/// <param name="targetFreq">目标频率</param>
/// <param name="sampleRate">采样率</param>
/// <param name="amplitudeInVol">波幅</param>
/// <param name="thdInDb">谐波失真(dB)</param>
/// <param name="nrInDb">噪声比(dB)</param>
/// <param name="thdPlusNRatioInDb">噪声和谐波失真与信号的比(dB)</param>
/// <param name="harmonicPower">谐波分量功率</param>
public static void AnalyzeSingleToneWave(double[] waveform, double targetFreq, double sampleRate,
out double amplitudeInVol, out double thdInDb, out double nrInDb, out double thdPlusNRatioInDb,
out double[] harmonicPower)
{
const ushort harmonicOrder = 6;
SingleToneAnalyzer analyzer = new SingleToneAnalyzer();
analyzer.SetTargetToneFrequency(targetFreq, sampleRate);
analyzer.Analyze(waveform, (uint)waveform.Length);
amplitudeInVol = analyzer.GetPeakToPeak();
thdInDb = analyzer.GetThd();
nrInDb = analyzer.GetNoiseRatio();
thdPlusNRatioInDb = analyzer.GetThdPlusN();
harmonicPower = new double[harmonicOrder];
for (ushort i = 0; i < harmonicOrder; i++)
{
harmonicPower[i] = analyzer.GetHarmonicPower(i);
}
}
public void ShowResult()
{
StringBuilder dispResult = new StringBuilder();
string newLine = Environment.NewLine;
const string delim = ",";
dispResult.Append("PeakToPeak(V):").Append(newLine).Append(_analyzer.GetPeakToPeak()).Append(newLine);
dispResult.Append("THD(db):").Append(newLine).Append(_analyzer.GetTHDInDb()).Append(newLine);
dispResult.Append("Noise Ratio(db):").Append(newLine).Append(_analyzer.GetNoiseRatioInDb()).Append(newLine);
dispResult.Append("Thd Plus Noise Ratio(dB):")
.Append(newLine)
.Append(_analyzer.GetNoiseRatioInDb())
.Append(newLine);
ArrayPair <double, double> harmonicPower = _analyzer.GetHarmonicPower();
dispResult.Append("Harmoic Power:").Append(newLine).Append(harmonicPower.YData[0]).Append(delim)
.Append(harmonicPower.YData[1]).Append(delim).Append(harmonicPower.YData[2]).Append(delim).
Append(harmonicPower.YData[3]).Append(delim).Append(harmonicPower.YData[4]).Append(delim).
Append(harmonicPower.YData[5]);
textBox_result.Text = dispResult.ToString();
}