{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,27]],"date-time":"2026-09-27T16:08:06Z","timestamp":1790525286359,"version":"4.1.0"},"reference-count":36,"publisher":"Acoustical Society of America (ASA)","issue":"5","content-domain":{"domain":["pubs.aip.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2007,11,1]]},"abstract":"<jats:p>In this article the results are reported of a study to measure the intensity of the vocal displays of a population of American alligators (Alligator mississippiensis). It was found that the dominant frequencies in air range between 20 and 250Hz with a source sound pressure level (SPL) of 91\u201394dB at 1m. The active space for the air-borne component is defined by the background and was estimated to be in a range up to 159m in the 125\u2013200Hz band. For the water-borne component the dominant frequency range was 20\u2013100Hz with a source SPL of 121\u2013125dB at 1m. The active space in water is defined by hearing thresholds and was estimated to range up to 1.5km in the 63\u2013100Hz band. In the lowest frequency bands, i.e., 16\u201350Hz, the estimated active space for otolith detection of near-field particle motion in water ranged to 80m, which compared significantly with far-field detection for these frequencies. It is suggested that alligator vocal communication may involve two distinct sensory mechanisms which may subserve the functions of scene analysis and reproduction, respectively.<\/jats:p>","DOI":"10.1121\/1.2785811","type":"journal-article","created":{"date-parts":[[2008,1,9]],"date-time":"2008-01-09T15:11:21Z","timestamp":1199891481000},"page":"2906-2915","update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":29,"title":["Estimated source intensity and active space of the American alligator (<i>Alligator Mississippiensis<\/i>) vocal display"],"prefix":"10.1121","volume":"122","author":[{"given":"Neil P. 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