Sound imaging of nocturnal animal calls in their natural habitat

Takeshi Mizumoto*, Ikkyu Aihara, Takuma Otsuka, Ryu Takeda, Kazuyuki Aihara, Hiroshi G. Okuno


研究成果: Article査読

19 被引用数 (Scopus)


We present a novel method for imaging acoustic communication between nocturnal animals. Investigating the spatio-temporal calling behavior of nocturnal animals, e.g., frogs and crickets, has been difficult because of the need to distinguish many animals' calls in noisy environments without being able to see them. Our method visualizes the spatial and temporal dynamics using dozens of sound-to-light conversion devices (called "Firefly") and an off-the-shelf video camera. The Firefly, which consists of a microphone and a light emitting diode, emits light when it captures nearby sound. Deploying dozens of Fireflies in a target area, we record calls of multiple individuals through the video camera. We conduct two experiments, one indoors and the other in the field, using Japanese tree frogs (Hyla japonica). The indoor experiment demonstrates that our method correctly visualizes Japanese tree frogs' calling behavior. It has confirmed the known behavior; two frogs call synchronously or in anti-phase synchronization. The field experiment (in a rice paddy where Japanese tree frogs live) also visualizes the same calling behavior to confirm anti-phase synchronization in the field. Experimental results confirm that our method can visualize the calling behavior of nocturnal animals in their natural habitat.

ジャーナルJournal of Comparative Physiology A: Neuroethology, Sensory, Neural, and Behavioral Physiology
出版ステータスPublished - 2011 9月

ASJC Scopus subject areas

  • 動物科学および動物学
  • 生態、進化、行動および分類学
  • 生理学
  • 行動神経科学


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