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Intensity, Intensity Level, and Intensity Spectrum Level

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Intensity, Intensity Level, and Intensity Spectrum Level

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    1. Intensity, Intensity Level, and Intensity Spectrum Level

    2. A Sonar System

    3. System Output Fourier Transform of the Time Domain Signal Frequency Analyzer

    4. Example

    5. Fourier Coefficients

    6. Band Level

    7. Example Using the plot of ISL as a function of frequency shown, calculate the band level of every band the total band level the total band level in a band from 150 Hz to 300 Hz

    8. Types of Spectrums

    9. Example

    10. Common Bandwidths Constant Bandwidth Df = constant Proportional Bandwidth Octave Bandwidth f2 = 21 f1 Half Octave Bandwidth f2 = 21/2 f1 Center Frequency

    11. Preferred Octave Bands

    12. Why do we care? Source Level (SL) and Noise Level (NL) are both examples of Band Levels (BL) where the frequency band(s) are defined by the frequencies of our Sonar System

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