The acoustic complexity graph has an x and a y axis. The x axis shows the hour of day and contains four hours of data including 4AM, 5AM, 6AM, and 7AM. The y axis shows the acoustic complexity index, a measure of bioacoustic activity. This particular graph shows an acoustic complexity index of 3.7 at 4AM, 7.8 at 5AM, 7.4 at 6AM, and 7.1 at 7AM. A text box on the graph asks the question: why is there less bioacoustic activity at 4AM?
Graph of acoustic complexity index calculated from acoustic recordings collected from Herbert Hoover National Historic Site in May-June 2019.
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Kathryn Nuessly, NPS
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Herbert Hoover National Historic Site, Code: HEHO
Herbert Hoover National Historic Site, Cedar County, Iowa Latitude: 41.6674003601074, Longitude: -91.3514022827148