Akoostix continues to experiment with flexible, low-processing-load marine mammal detection options suitable for implementation in both workstations and low-power embedded systems. Building on previous work, additional processing stages have been added to normalize and de-noise spectrograms using a wide variety of user-configurable options. These pre-processing options can be optimized for the signals of interest, which enhances targets while significantly reducing the impact of structured noise that cause false alarms with other methods. Band-limited signal excess is then computed using one of several weighting functions, after which detection is performed on the signal excess time series. Out-of-band tests are also performed to ensure band-limited signals. The detector is tested on the workshop Minke whale localization dataset with configurations of varying complexity and performance (detection and processing load) are compared to other detection algorithms.
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