{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T02:46:06Z","timestamp":1760237166486,"version":"build-2065373602"},"reference-count":16,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2020,3,3]],"date-time":"2020-03-03T00:00:00Z","timestamp":1583193600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["11374192, 11574183, and 31270414"],"award-info":[{"award-number":["11374192, 11574183, and 31270414"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100014417","name":"Fundamental Research Fund of Shandong University","doi-asserted-by":"publisher","award":["2014QY008"],"award-info":[{"award-number":["2014QY008"]}],"id":[{"id":"10.13039\/100014417","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Symmetry"],"abstract":"<jats:p>Active noseleaf deformations during pulse emission observed in hipposiderid and rhinolophid bats have been shown to add a time dimension to the bats\u2019 acoustic emission characteristics beyond the established dependencies on frequency and direction. In this study, a dense three-dimensional acoustic characteristics were obtained by the time series of smoothed signal amplitudes at different directions and frequencies collected by a biomimetic dynamic sonar emitter. These data have been analyzed using differential entropy which was used as a measure to compare the encoding capacity for sensory information between the three different dimensions. The capacity for sensory information encoding measured in this way along time dimension was found to be similar to that along the frequency dimension. But both of them provided less information than provided by the direction dimension.<\/jats:p>","DOI":"10.3390\/sym12030391","type":"journal-article","created":{"date-parts":[[2020,3,4]],"date-time":"2020-03-04T03:24:20Z","timestamp":1583292260000},"page":"391","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Differential Entropy Analysis of the Acoustic Characteristics of a Biomimetic Dynamic Sonar Emitter"],"prefix":"10.3390","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8652-5438","authenticated-orcid":false,"given":"Luhui","family":"Yang","sequence":"first","affiliation":[{"name":"School of Mechanical and Electronic Engineering, Shandong Jianzhu University, Jinan 250101, China"},{"name":"Shandong University\u2013Virginia Tech International Laboratory, School of Physics, Shandong University, Jinan 250100, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8358-4053","authenticated-orcid":false,"given":"Rolf","family":"M\u00fcller","sequence":"additional","affiliation":[{"name":"Shandong University\u2013Virginia Tech International Laboratory, School of Physics, Shandong University, Jinan 250100, China"},{"name":"Department of Mechanical Engineering, Virginia Tech, Blacksburg, VA 24061, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2020,3,3]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"559","DOI":"10.1007\/BF00611919","article-title":"Foraging behavior and Doppler shift compensation in echolocating hipposiderid bats, Hipposideros bicolor and Hipposideros speoris","volume":"155","author":"Habersetzer","year":"1984","journal-title":"J. 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