title: Echolocation of insects using intermittent frequency-modulated sounds.
abstract: Using echolocation influenced by Doppler shift, bats can capture flying insects in real three-dimensional space. On the basis of this principle, a model that estimates object locations using frequency modulated (FM) sound was proposed. However, no investigation was conducted to verify whether the model can localize flying insects from their echoes. This study applied the model to estimate the range and direction of flying insects by extracting temporal changes from the time-frequency pattern and interaural range difference, respectively. The results obtained confirm that a living insect's position can be estimated using this model with echoes measured while emitting intermittent FM sounds.
authors.affiliation: Department of Information Science, Tohoku Gakuin University, 2-1-1 Tenjinzawa, Izumi-ku, Sendai 981-3193, Japan matsuo@cs.tohoku-gakuin.ac.jp.
authors.forename: Ikuo
authors.initials: I
authors.lastname: Matsuo
authors.affiliation: Forestry and Forest Products Research Institute, Tsukuba 305-8687, Japan takanasi@affrc.go.jp.
authors.forename: Takuma
authors.initials: T
authors.lastname: Takanashi
mesh_terms: D000162:Acoustics; D000818:Animals; D002685:Chiroptera / Q000502:physiology*; D001517:Coleoptera / Q000033:anatomy & histology / Q000502:physiology*; D003198:Computer Simulation; D004301:Doppler Effect; D004455:Echolocation; D005247:Feeding Behavior; D005426:Flight, Animal; D008954:Models, Biological; D009038:Motion; D011235:Predatory Behavior; D012815:Signal Processing, Computer-Assisted; D013016:Sound; D013018:Sound Spectrography; D013997:Time Factors; D014741:Video Recording; D014921:Wings, Animal / Q000033:anatomy & histology / Q000502:physiology