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User's Manual - Cornell Lab of Ornithology - Cornell University

User's Manual - Cornell Lab of Ornithology - Cornell University

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The recording buffer; recording time.......................................... 40Continuous recording ................................................................ 41Making a recording to memory .................................................. 41Recording to disk ....................................................................... 42Destination file ........................................................................... 42Recording time........................................................................... 42Making a recording to disk......................................................... 42Saving preferences .................................................................... 42Chapter 3 Spectrum Analysis....................................................... 43About this chapter...................................................................... 43Spectrum analysis parameters ................................................. 43Analysis resolution: Filter Bandwidth and Frame Length........... 45Grid resolution ........................................................................... 47Window Function ....................................................................... 50Clipping Level ............................................................................ 52Logarithmic vs. quadratic amplitude axis................................... 55Named options sets................................................................... 57Spectra ........................................................................................ 58Significance <strong>of</strong> the spectrum values .......................................... 58Number <strong>of</strong> frames to average.................................................... 58Spectrograms ............................................................................. 59Significance <strong>of</strong> the grayscale values ......................................... 59Contrast and brightness ............................................................ 59Boxy vs. smooth ........................................................................ 61Time and memory requirements................................................ 63Scaling and labeling <strong>of</strong> axes ..................................................... 63Automatic scaling and labeling .................................................. 63Stretching and squeezing axes ................................................. 63<strong>Manual</strong> scaling........................................................................... 64Selections and cursors .............................................................. 65Coupled selections .................................................................... 65Selections in the spectrum ........................................................ 65Spectrum amplitude cursors..................................................... 65Selections in the waveform........................................................ 65Selections in the spectrogram ................................................... 65Background processing ............................................................ 66Changing analysis parameters ................................................. 66Spectrogram and spectrum measurements............................. 66Chapter 4 Signal Amplitude Calibration .................................. 67About this chapter...................................................................... 67iii

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