PMC

The schematic used for the 3-D printing of the sonar transducer holder. The sonar system consists of three sonar transducers oriented with 30 degree angular separation mounted on a rotating servo motor (not shown).

The sonar system consists of an emitter and two receivers embedded in plastic replica of the bat's pinnae. a) Overview of the different functional blocks of the sonar system: digital subsystem with USB interface and 2 analog to digital converters; receiver subsystem containing 2 amplifiers and microphones; emitter subsystem containing digital to analog converter, high voltage amplifier and Polaroid transducer. b) Photograph of the constructed sonar head, showing the Polaroid transducer (1) and the microphones inserted in the pinna replica's (2). The position of the microphones is indicated by the black arrows.

The A two transducer sonar head mounted on a hobby servomechanism that was used for the experiments in this paper. The sonar modules are a custom 40 kHz system modified from a high-power Maxbotix sonar.

(a) The biomimetic sonar head with the ¼” G.R.A.S. microphone and the custom build EMFI- transducer. (b) Schematic illustration of the measuring setup.