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- W1997061243 abstract "Understanding the dynamics of bullfrog choruses, particularly the occurrence of acoustic interactions among the calling males, requires segregating and characterizing the sequences of vocalizations from individual frogs making up the chorus night after night for a calling season lasting almost a month. Chorusing takes place in the dark, often at ponds surrounded by vegetation, in conditions where visual observation to locate calling individuals is rarely possible. To record choruses, we used two acoustic sensor units, each consisting of four electret condenser microphones mounted on the faces of a 3-cm cube, located 5–10 m apart and aligned alongside a pond. Signals were stored on an 8-channel digital instrumentation recorder. These signals were used to estimate the horizontal directions and, from these, the locations of multiple bullfrogs (Rana catesbeiana) vocalizing at night. The array’s mixture of short and long apertures was conceived for acoustic surveying to avoid problems caused by variations in acoustic propagation due to wind and vegetation, and to avoid ambiguities caused by multiple overlapping signals detected only over long apertures. Several kinds of acoustic interactions are evident when calls are assigned to individual animals. [Work supported by DARPA, ONR, NIH.]" @default.
- W1997061243 created "2016-06-24" @default.
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- W1997061243 date "2004-10-01" @default.
- W1997061243 modified "2023-09-25" @default.
- W1997061243 title "Dynamics of bullfrog choruses studied by time‐delay localization with an acoustic array" @default.
- W1997061243 doi "https://doi.org/10.1121/1.4785396" @default.
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