TimeInFile

Time of the call within the file (miliseconds).

 

PrecedingIntrvl

Time between the current call and the previous call (miliseconds).


CallsPerSec

Mean calls per second of the recording or section of recording displayed. The accuracy of the reported value depends both on the quality of the recording and the absence of other bats and other signals in the recording. Any other signal components that pass through the discrimination logic will be counted as calls and contribute to (and reduce the accuracy of) the calculation.

 

CallDuration

Duration of the call (miliseconds).

Fc

Characteristic frequency of the call. Determined by finding the point in the final 40% of the call having the lowest slope or exhibiting the end of the main trend of the body of the call (kHz).

 

HiFreq

Highest apparent frequency of the call.

 

LowFreq

Lowest apparent frequency of the call.

 

Bndwdth

Total frequency spread of the call. Calculated from the difference between the highest and lowest frequency.

 

FreqMaxPwr

The frequency of the maximum amplitude of the call.

 

PrcntMaxAmpDur

Percentage of the entire call duration at which the maximum amplitude occurs.

 

TimeFromMaxToFc

Time from the point at which the maximum amplitude occurs to the point in the call of the characteristic frequency.

 

FreqKnee

Frequency at which the initial slope of the call most abruptly transitions to the slope of the body of the call.

 

PrcntKneeDur

Percentage of the entire call duration at which the knee occurs, i.e., the point at which the initial slope of the call most abruptly transitions to the slope of the body of the call.

 

StartF

Frequency of the start of the call. Typically the same point as the highest frequency, but different if the call initially rises in frequency.

 

EndF

Frequency of the end of the call. Typically the same point as the lowest frequency, but different if the call ends with a rise in frequency.

 

DominantSlope

Slope of the longest sustained trend in slope of the call. Determined by finding the segment of the call having the minimum residue for a linear regression of a segment of the call of 20% the duration of the call (kHz/msec).

 

SlopeAtFc

Instantaneous slope at the point of the characteristic frequency.

 

StartSlope

Slope at the start of the call, calculated from the first 5% of the call duration.

 

EndSlope

Slope at the end of the call, calculated from the final 5% of the call duration.

 

SteepestSlope

Steepest slope of the call, calculated from a linear regression of a segment of 10% the duration of the call.

 

LowestSlope

Lowest slope of the call, calculated from a linear regression of a segment of 10% the duration of the call.

 

TotalSlope

Total slope of the call, calculated from the difference in frequency and time from the point of highest frequency to the point of the characteristic frequency.

 

HiFtoKnSlope

Slope of the call calculated from the difference in frequency and time from the point of highest frequency to the point of the knee.

 

KneeToFcSlope

Slope of the call calculated from the difference in frequency and time from the point of the knee to the point of the characteristic frequency.

 

CummNmlzdSlp

Average of the instantaneous slopes of the call.

 

HiFtoFcExpAmp

Amplitude parameter of an exponential fit of the call from the point of high frequency to the point if the characteristic frequency.

 

HiFtoFcDmp

Damping parameter of an exponential fit of the call from the point of high frequency to the point if the characteristic frequency.

 

KnToFcExpAmp

Amplitude parameter of an exponential fit of the call from the point of the knee to the point if the characteristic frequency.

 

KnToFcDmp

Damping parameter of an exponential fit of the call from the point of the knee to the point if the characteristic frequency.

 

HiFtoKnExpAmp

Amplitude parameter of an exponential fit of the call from the point of the high frequency to the point if the characteristic frequency.

 

HiFtoKnDmp

Damping parameter of an exponential fit of the call from the point of the high frequency to the point if the characteristic frequency.

 

FreqLedge

Frequency of the ledge, i.e., the most abrupt transition to the most extended flattest slope section of the body of the call preceding the characteristic frequency, also referred to as the "ledge" of the call.

 

LedgeDuration

Duration of the ledge, i.e., the most extended flattest slope section of the body of the call preceding the characteristic frequency.

 

FreqCtr

Frequency at the center of the duration of the call.

 

FBak32dB

Frequency of the call 32 dB below the point of maximum amplitude of the call, and preceding the point of maximum amplitude of the call.

 

FFwd32dB

Frequency of the call 32 dB below the point of maximum amplitude of the call, and after the point of maximum amplitude of the call.

 

FBak20dB

Frequency of the call 20 dB below the point of maximum amplitude of the call, and preceding the point of maximum amplitude of the call.

 

FFwd20dB

Frequency of the call 20 dB below the point of maximum amplitude of the call, and after the point of maximum amplitude of the call.

 

FBak15dB

Frequency of the call 15 dB below the point of maximum amplitude of the call, and preceding the point of maximum amplitude of the call.

 

FFwd15dB

Frequency of the call 15 dB below the point of maximum amplitude of the call, and after the point of maximum amplitude of the call.

 

FBak5dB

Frequency of the call 5 dB below the point of maximum amplitude of the call, and preceding the point of maximum amplitude of the call.

 

FFwd5dB

Frequency of the call 5 dB below the point of maximum amplitude of the call, and after the point of maximum amplitude of the call.

 

Bndw32dB

The total bandwidth covered from the point of the call 32 dB below and before the point of maximum amplitude and the point of the call 32 dB below and after the point of maximum amplitude of the call.

 

Bndw20dB

The total bandwidth covered from the point of the call 20 dB below and before the point of maximum amplitude and the point of the call 32 dB below and after the point of maximum amplitude of the call.

 

Bndw15dB

The total bandwidth covered from the point of the call 15 dB below and before the point of maximum amplitude and the point of the call 32 dB below and after the point of maximum amplitude of the call.

 

Bndw5dB

The total bandwidth covered from the point of the call 5 dB below and before the point of maximum amplitude and the point of the call 32 dB below and after the point of maximum amplitude of the call.

 

DurOf32dB

The duration of the call from the point of the call 32 dB below and before the point of maximum amplitude and the point of the call 32 dB below and after the point of maximum amplitude of the call.

 

DurOf20dB

The duration of the call from the point of the call 20 dB below and before the point of maximum amplitude and the point of the call 32 dB below and after the point of maximum amplitude of the call.

 

DurOf15dB

The duration of the call from the point of the call 15 dB below and before the point of maximum amplitude and the point of the call 32 dB below and after the point of maximum amplitude of the call.

 

DurOf5dB

The duration of the call from the point of the call 5 dB below and before the point of maximum amplitude and the point of the call 32 dB below and after the point of maximum amplitude of the call.

 

Amp1stQrtl

Total amplitude of the first quartile of the call (relative units).

 

Amp2ndQrtl

Total amplitude of the second quartile of the call (relative units).

 

Amp3rdQrtl

Total amplitude of the third quartile of the call (relative units).

 

Amp4thQrtl

Total amplitude of the fourth quartile of the call (relative units).

 

Amp1stMean

Mean of the first quartile amplitude (relative units).

 

Amp2ndMean

Mean of the second quartile amplitude (relative units).

 

Amp3rdMean

Mean of the third quartile amplitude (relative units).

 

Amp4thMean

Mean of the fourth quartile amplitude (relative units).

 

LnExpA_StartAmp

Amplitude parameter of an exponential fit of the time-amplitude trend of the call from the start of the call to the point of maximum amplitude.

 

LnExpB_StartAmp

Damping parameter of an exponential fit of the time-amplitude trend of the call from the start of the call to the point of maximum amplitude.

 

AmpStartLn60ExpC

Time parameter of an exponential fit of the time-amplitude trend of the call from the start of the call to the point of maximum amplitude.

 

LnExpA_EndAmp

Amplitude parameter of an exponential fit of the time-amplitude trend of the call from the point of maximum amplitude to the end of the call.

 

LnExpB_EndAmp

Damping parameter of an exponential fit of the time-amplitude trend of the call from the point of maximum amplitude to the end of the call.

 

AmpEndLn60ExpC

Time parameter of an exponential fit of the time-amplitude trend of the call from the point of maximum amplitude to the end of the call.

 

AmpK@start

Slope of a logarithmic plot of the time-amplitude trend of the call from the start of the call to the point of maximum amplitude.

 

AmpK@end

Slope of a logarithmic plot of the time-amplitude trend of the call from the point of maximum amplitude to the end of the call.

 

AmpKurtosis

Kurtosis of the time-amplitude trend.

 

AmpSkew

Skew of the time-amplitude trend.

 

AmpVariance

Variance of the time-amplitude trend.

 

AmpMoment

Moment of the time-amplitude trend.

 

AmpGausR2

R-squared of a Gaussian fit of the time amplitude trend.

 

Quality

Quality rating of the call based on the total points of the sonogram above a threshold value. SonoBat uses this synthesized measure to assist in the call trending analysis of strong and weak call signals.

 

HiFminusStartF

High frequency minus start frequency. This measure may be used as a quality control check to sort and reject improperly trended calls. For typical frequency modulated calls, a value greater than zero (i.e, start frequency less than high frequency) may indicate an improperly trended call.

 

FcMinusEndF

Characteristic frequency minus start frequency. This measure may be used as a quality control check to sort and reject improperly trended calls. Use as appropriate for different types of calls. For example, most calls from the genus Myotis should have a positive value for this measure indicating the end frequency is less than the characteristic frequency. A negative value might indicate an improper trend as the result of a poor signal or excessive echo obscuring the end of the call.

 

RelPwr2ndTo1st

Ratio of the strength of the harmonic that SonoBat trended (typically the first or primary harmonic) to the strength of the next higher harmonic (typically the second harmonic). A ratio of the 3rd harmonic that exceeds the 2nd harmonic's ratio typically indicates a saturated or "clipped" signal. Such calls will render inaccurate assessments of power distribution through the call, although the time-frequency trend will remain reliable.

 

RelPwr3rdTo1st Ratio of the strength of the harmonic that SonoBat trended (typically the first or primary harmonic) to the strength of the second higher harmonic (typically the third harmonic). A ratio of the 3rd harmonic that exceeds the 2nd harmonic's ratio typically indicates a saturated or "clipped" signal. Such calls will render inaccurate assessments of power distribution through the call, although the time-frequency trend will remain reliable.