{"584219":{"#nid":"584219","#data":{"type":"event","title":"Animal Aeroacoustics: singing feathers, humming of hummingbirds, and the silent flight of owls","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003ESchool of Physics Soft Condensed Matter \u0026amp; Physics of Living Systems Seminar:\u0026nbsp;Prof. Christopher J Clark, University of California Riverside\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EAnimal\u0026nbsp;Aeroacoustics is the study of the acoustics and biology of the sounds animals make when they fly.\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EWe begin by exploring an acoustic mechanism that, while catastrophic\u0026nbsp;for aircraft, many birds use to communicate: aeroelastic flutter. The tail of hummingbirds is essentially a \u0026#39;musical instrument\u0026#39;: by evolving different shapes of tail-feathers, different species produce a range of species-specific sounds. Moreover, we demonstrate three different types of interactions between adjacent\u0026nbsp;fluttering feathers that enhance the acoustic diversity of sound that is produced.\u003C\/p\u003E\r\n\r\n\u003Cp\u003ENext, we explore how hummingbirds use behavior to modulate the sounds they produce with their tail during a courtship dive, as heard by a recipient, a female.\u0026nbsp; We recorded dives using two \u0026#39;acoustic cameras\u0026#39; (phased arrays of microphones that use beamforming to localize sound) to track the bird through 3D space. We demonstrate that male Costa\u0026#39;s Hummingbird (\u003Cem\u003ECalypte costae\u003C\/em\u003E) places the female in a part of the sound field in which the Doppler shift is minimized, while simultaneously employing strategies to maximize loudness.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EFinally, we discuss ongoing projects on the hum of hummingbirds, buzzing of bee and mosquito wings, as well as work on the silent flight of hunting owls.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Animal Aeroacoustics: singing feathers, humming of hummingbirds, and the silent flight of owls"}],"uid":"30957","created_gmt":"2016-11-22 23:05:31","changed_gmt":"2017-04-13 21:13:52","author":"Shaun Ashley","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2016-12-06T15:00:00-05:00","event_time_end":"2016-12-06T16:00:00-05:00","event_time_end_last":"2016-12-06T16:00:00-05:00","gmt_time_start":"2016-12-06 20:00:00","gmt_time_end":"2016-12-06 21:00:00","gmt_time_end_last":"2016-12-06 21:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"126011","name":"School of Physics"},{"id":"1278","name":"College of Sciences"}],"categories":[],"keywords":[{"id":"166937","name":"School of Physics"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78751","name":"Undergraduate students"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cp\u003Eshaun.ashley@physics.gatech.edu\u003C\/p\u003E\r\n","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}}}