47-channel burst-mode recording hydrophone system enabling measurements of the dynamic echolocation behavior of free-swimming dolphins.
Detailed echolocation behavior studies on free-swimming dolphins require a measurement system that incorporates multiple hydrophones (often >16). However, the high data flow rate of previous systems has limited their usefulness since only minute long recordings have been manageable. To address this problem, this report describes a 47-channel burst-mode recording hydrophone system that enables highly resolved full beamwidth measurements on multiple free-swimming dolphins during prolonged recording periods. The system facilitates a wide range of biosonar studies since it eliminates the need to restrict the movement of animals in order to study the fine details of their sonar beams.
Starkhammar
Josefin
J
Electrical Measurements, Faculty of Engineering LTH, Lund University, Lund, Sweden. josefin.starkhammar@elmat.lth.se
Amundin
Mats
M
Nilsson
Johan
J
Jansson
Tomas
T
Kuczaj
Stan A
SA
Almqvist
Monica
M
Persson
Hans W
HW
D000162:Acoustics / Q000295:instrumentation*; D000818:Animals; D001522:Behavior, Animal; D050681:Bottle-Nosed Dolphin / Q000502:physiology*; D004455:Echolocation; D004581:Electronics / Q000295:instrumentation*; D005106:Exploratory Behavior; D013550:Swimming; D013997:Time Factors