Counts the number of spectral tracks or harmonics in the passed ferquency band. Also calculates the average amplitude of the peaks to each succeeding trough.

Declaration

public static Tuple<double, int, bool[]> CountHarmonicTracks(double[] values, int expectedHarmonicCount)

Parameters

Type	Name	Description
Double[]	values	Spectral values in the frequency band.
Int32	expectedHarmonicCount

Returns

Type	Description
Tuple<Double, Int32, Boolean[]>

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CountHarmonicTracks(Double[,], Int32, Int32, Int32, Int32, Double)

Declaration

public static Tuple<double[], double[, ]> CountHarmonicTracks(double[, ] matrix, int minBin, int maxBin, int hzWidth, int expectedHarmonicCount, double amplitudeThreshold)

Parameters

Type	Name	Description
Double[,]	matrix
Int32	minBin
Int32	maxBin
Int32	hzWidth
Int32	expectedHarmonicCount
Double	amplitudeThreshold

Returns

Type	Description
Tuple<Double[], Double[,]>

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DetectHarmonicsUsingDCT(Double[,], Int32, Int32, Int32, Boolean, Int32, Int32, Double)

THIS METHOD NO LONGER IN USE. NOT USEFUL FOR ANIMAL CALLS. Tried this but it is suitable only when there is guarantee of numerous spectral tracks as in the vowels of human speech. It yields SPURIOUS RESULTS where there is only one whistle track.

Declaration

public static double[, ] DetectHarmonicsUsingDCT(double[, ] matrix, int minBin, int maxBin, int hzWidth, bool normaliseDCT, int minPeriod, int maxPeriod, double dctThreshold)

Parameters

Type	Name	Description
Double[,]	matrix
Int32	minBin
Int32	maxBin
Int32	hzWidth
Boolean	normaliseDCT
Int32	minPeriod
Int32	maxPeriod
Double	dctThreshold

Returns

Type	Description
Double[,]

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DetectHarmonicsUsingFormantGap(Double[,], Int32, Int32, Int32, Int32, Int32, Int32, Double)

This method did not work much better than the DCT method - see below. Looks for a series of harmonic tracks at fixed freq intervals. Problem is that the harmonic tracks are not necessarily at fixed intervals.

Declaration

public static Tuple<double[], double[, ]> DetectHarmonicsUsingFormantGap(double[, ] matrix, int minBin, int maxBin, int hzWidth, int minPeriod, int maxPeriod, int minHarmonicPeriod, double amplitudeThreshold)

Parameters

Type	Name	Description
Double[,]	matrix
Int32	minBin
Int32	maxBin
Int32	hzWidth
Int32	minPeriod
Int32	maxPeriod
Int32	minHarmonicPeriod
Double	amplitudeThreshold

Returns

Type	Description
Tuple<Double[], Double[,]>

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Execute(SpectrogramStandard, Int32, Int32, Int32, Double)

Returns a tuple consisting of:

an array of scores over the entire recording
a list of acoustic events
a matrix of hits corresonding to the spectrogram.

Declaration

public static Tuple<double[], double[, ]> Execute(SpectrogramStandard sonogram, int minHz, int maxHz, int harmonicCount, double amplitudeThreshold)

Parameters

Type	Name	Description
SpectrogramStandard	sonogram	sonogram derived from the recording.
Int32	minHz	min bound freq band to search.
Int32	maxHz	max bound freq band to search.
Int32	harmonicCount	expected number of harmonics in the frequency band.
Double	amplitudeThreshold	ignore harmonics with an amplitude less than this minimum dB.

Returns

Type	Description
Tuple<Double[], Double[,]>