Echolocation signals
Prey capture success revealed by echolocation signals in pipistrelle bats (Pipistrellus pygmaeus)
... use echolocation or biosonar signals to orient and locate ...ultrasonic signals and listen for the echoes reflected from surroundings and ...the signals change in a typical way: signal ...
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Source levels of echolocation signals vary in correlation with wingbeat cycle in landing big brown bats (Eptesicus fuscus)
... the echolocation signals of landing big brown bats with a two-dimensional 16-microphone array revealed that the source level reduction of 7 dB per halving of distance is superimposed by a variation of up ...
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Echolocation signals of wild harbour porpoises, Phocoena phocoena
... The biosonar performance of a toothed whale under low noise and reverberation conditions is described by the transient form of the sonar equation (Eqn·1). The returning echo energy flux density is a function of the ...
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Analysis and Modeling of Echolocation Signals Emitted by Mediterranean Bottlenose Dolphins
... Communication signals (burst pulses and whis- tles) have a range of frequencies from 1 to 25 ...sonar signals have a range of frequencies from 25 to 150 ...
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Dolphin echolocation behaviour during active long range target approaches
... emit signals at the slowest rates during the search phase, with the rate employed being highly species specific (Jensen et ...produces echolocation signals at very short ICIs, but still longer than ...
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Echolocation signal structure in the Megachiropteran bat Rousettus aegyptiacus Geoffroy 1810
... sophisticated echolocation systems, which are well matched to their ecological niche (Fenton, ...as echolocation signals (Fenton, ...for echolocation (Connor, ...
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Active echolocation beam focusing in the false killer whale, Pseudorca crassidens
... species’ echolocation signals is approximately 5cm (Kloepper et ...the echolocation beam (Keating, 2002), and this focusing may be changed by the muscles surrounding the melon, which are ...
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Delphinid echolocation click detection probability on near seafloor sensors
... and echolocation signals of the species of ...of echolocation click parameters as well as indi- vidual and group behaviors are needed to improve model ...
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Echolocation in sympatric Peale's dolphins (Lagenorhynchus australis) and Commerson's dolphins (Cephalorhynchus commersonii) producing narrow band high frequency clicks
... sonar signals of different Microchiropteran bats show adaptations to different clutter and noise levels, and several eco-types of bat sonar have been proposed based on how close the bats forage to reflective ...
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Echolocation by two foraging harbour porpoises (Phocoena phocoena)
... In fish catch trials similar to the ones presented here, the same porpoises as used in our study showed a change of emission level of the outgoing signal with distance (Beedholm and Miller, 2007). The porpoises decreased ...
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Echolocation call intensity in the aerial hawking bat Eptesicus bottae (Vespertilionidae) studied using stereo videogrammetry
... intense echolocation signals: by coupling call emission to their wing beat, they can utilize the increased lung pressure generated by the work of the flight muscles for their vocalizations (Heblich, 1986; ...
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Possible age related hearing loss (presbycusis) and corresponding change in echolocation parameters in a stranded Indo Pacific humpback dolphin
... its echolocation signals to match its range of best hearing has only been performed on a false killer whale (Pseudorca crassidens) in captivity (Kloepper et ...of echolocation clicks for the hearing ...
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Baier, Anne Leonie (2019): Coding of spatial and temporal frequency in bat biosonar. Dissertation, LMU München: Fakultät für Biologie
... I was interested in the attack behaviour of the frog-eating bat when presented with artificial water waves mimicking the ripples created by the inflating vocal sac of the túngara frog. In order to learn more about how ...
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First record of Micronycteris sanborni (Chiroptera: Phyllostomidae) from Central Amazonia, Brazil: range expansion and description of its echolocation
... ’ echolocation call characteristics confirmed highly frequency-modulated multiharmonic pulses, as have been documented for other phyllostomid bats (fre- quencies > 100 kHz and around 1 ms in duration) ( Barclay ...
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What ears do for bats: a comparative study of pinna sound pressure transformation in chiroptera
... The directionality of the echolocation system has been measured previously using different methods in a variety of bats (e.g. in Myotis lucifugus and Corynorhinus townsendii, Grinnell, 1963; Eptesicus fuscus, ...
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Variations in respiratory muscle activity during echolocation when stationary in three species of bat (Microchiroptera: Vespertilionidae)
... constant-frequency echolocation decrease their dependence on muscular activity by relying on the passive stiffness of the rib cage and greater elasticity of the abdominal aponeurosis (Lancaster et ...
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Jamming bat echolocation: the dogbane tiger moth Cycnia tenera times its clicks to the terminal attack calls of the big brown bat Eptesicus fuscus
... the echolocation playback signals. The echolocation playback signals and moth clicks were recorded onto a second RACAL tape recorder running at 30 inches s 21 ...
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Comparing passive and active hearing: spectral analysis of transient sounds in bats
... recorded echolocation call sequences of the preceding 4·s before decision during almost all trials in Experiment 2 (phase 24, Terratec, Herrenpfad, Germany; 192·kHz sampling rate, 24 bit), altogether 2134 call ...
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... 18th February 2016, two individuals of H. hypophyllus (both females) and three individuals of H. durgadasi (two females, one male) were captured between 18:50– 19:05 hr near the roost at Hanumanahalli using mist nets ...
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The echolocation calls of the spotted bat Euderma maculatum are relatively inaudible to moths
... low frequencies (Griffin, 1971; Lawrence and Simmons, 1982) place limitations on the acoustic efficacy of allotonic echolocation. Nevertheless, some bats do use allotonic frequencies as the main component of their ...
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