A method for estimating the orientation of a directional sound source from source directivity and multi-microphone recordings: principles and application

Francesco Guarato, Lasse Jakobsen, Dieter Vanderelst, Annemarie Surlykke, John Hallam

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Taking into account directivity of real sound sources makes it possible to try solving an interesting and biologically relevant problem: estimating the orientation in three-dimensional space of a directional sound source. The source, of known directivity, produces a broadband signal (in the ultrasonic range, in this application) that is recorded by microphones whose position with respect to source is known. An analytical method to process the recorded signals and estimate source orientation is developed in this paper. Experiments testing method performance in estimating source orientation were performed both in a laboratory environment with a Polaroid transducer as source and in a flight room with a Myotis daubentonii bat. In the first case, results showed the estimation method to be accurate and pointed out its limitations. The latter case is significant as an example biological application of the method for extracting behavioral features from bats; results are compared with alternative calculations based on microphone root-mean-square (rms)-pressure values.
Original languageEnglish
JournalAcoustical Society of America. Journal
Volume129
Issue number2
Pages (from-to)1046-58
Number of pages13
ISSN0001-4966
DOIs
Publication statusPublished - 2011

Keywords

  • Animals
  • Chiroptera
  • Echolocation
  • Equipment Design
  • Flight, Animal
  • Models, Biological
  • Signal Processing, Computer-Assisted
  • Sound Localization
  • Transducers
  • Ultrasonics
  • Vocalization, Animal

Fingerprint

Dive into the research topics of 'A method for estimating the orientation of a directional sound source from source directivity and multi-microphone recordings: principles and application'. Together they form a unique fingerprint.

Cite this