Features in geometric receiver shapes modelling bat-like directivity patterns

Francesco Guarato, Heather Andrews, James F C Windmill, Joseph Jackson, Gareth Pierce, Anthony Gachagan

Research output: Contribution to journalArticle

5 Citations (Scopus)
87 Downloads (Pure)

Abstract

The directional properties of bat ears as receivers is a current area of interest in ultrasound research. This paper presents a new approach to analyse the relationship between morphological features and acoustical properties of the external ear of bat species. The beam pattern of Rousettus leschenaultii’s right ear is measured and compared to that of receiver structures whose design is inspired by the bat ear itself and made of appropriate geometric shapes. The regular shape of these receivers makes it possible to control the key reception parameters and thus to understand the effect on the associated beam pattern of the parameters themselves. Measurements show one receiver structure has a beam pattern very similar to that of R. leschenaultii’s ear, thus explaining the function of individual parts constituting its ear. As it is applicable to all bat species, this approach can provide a useful tool to investigate acoustics in bats, and possibly other mammals.
Original languageEnglish
Article number056007
Number of pages12
JournalBioinspiration & Biomimetics
Volume10
Issue number5
DOIs
Publication statusPublished - 3 Sep 2015

Keywords

  • receivers
  • beam pattern
  • acoustic measurement
  • bats
  • Chiroptera
  • Rousettus leschenaultii
  • receiver structures

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