Bats, Echolocation
Ambient noise causes independent changes in distinct spectro temporal features of echolocation calls in horseshoe bats
... horseshoe bats (Hage et ...their echolocation calls were controlled independently depending on which frequency band within the bat’s hearing range was masked by bandpass-filtered noise (BFN; bandwidth 20 ...
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Directionality of nose emitted echolocation calls from bats without a nose leaf (Plecotus auritus)
... of echolocation-beam directionality in a gleaning vespertilionid ...directional echolocation beams (DI ≈ 17 dB) while ...gleaning bats emit a narrow echolocation beam to reduce the impact of ...
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Intense echolocation calls from two `whispering' bats, Artibeus jamaicensis and Macrophyllum macrophyllum (Phyllostomidae)
... of bats, ...of echolocation calls clearly reflect the foraging behaviour of the species, such that open air foragers are characterised by long, narrowband signals that decrease in duration and increase in ...
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Time variant spectral peak and notch detection in echolocation call sequences in bats
... an echolocation call filtered with a band-pass (peak) filter centred at 60·kHz will cause a pitch percept corresponding to ...the bats would hear a time-variant ...the bats always hear all harmonics ...
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Echolocation call structure and intensity in five species of insectivorous bats
... the bats may have responded to flying in an enclosed space by reducing their call ...stationary bats echolocate more at lower intensities than do flying ones support the suggestion that flight and ...
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Source levels of echolocation signals vary in correlation with wingbeat cycle in landing big brown bats (Eptesicus fuscus)
... Source levels for all calls emitted were high-pass filtered as a function of time to account for the individual-specific range- dependent SL reduction as the bat approached the landing site. In order to synchronize wing ...
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Echolocation behaviour and prey capture success in foraging bats: laboratory and field experiments on Myotis daubentonii
... of bats vary in design, and their structure often reflects the ecological and sensory requirements of the bats (Neuweiler, 1989; Fenton, ...Individual bats can modify their calls according to ...
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Active acoustic interference elicits echolocation changes in heterospecific bats
... in echolocation parameters. Given that bats possess neurons that respond selectively to sweep direction (Andoni et ...three bats individually during capture attempts via an AT100 ultrasonic ...
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Acoustic identification of five insectivorous bats by their echolocation calls in the Sahelian zone of Far North Cameroon
... of bats activities (Table ...Free-flying bats were captured using two mist nets with four shelves (9 × ...the bats were released for validation of echolocation ...
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The peripheral auditory characteristics of noctuid moths: responses to the search phase echolocation calls of bats
... FM bats tested, which are generally 103–109 dB peSPL at 10 cm (Waters and Jones, ...FM bats tested (using the threshold criteria we have ...ceases echolocation prior to prey capture and occasionally ...
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Echolocation and passive listening by foraging mouse eared bats Myotis myotis and M blythii
... increased echolocation interpulse intervals, probably to reduce temporal overlap between incoming signals (Barber et ...in bats foraging on the ...between echolocation and passive ...of ...
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Echolocation behavior in big brown bats is not impaired after intense broadband noise exposures
... Echolocating bats emit trains of intense ultrasonic biosonar pulses and listen to weaker echoes returning from objects in their ...capture. Bats are social animals and often fly in groups in which they are ...
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High duty cycle echolocation and prey detection by bats
... laryngeal echolocation in bats. Although most bats separate pulse and echo in time by signalling at low duty cycles (LDCs), almost 20% of species produce calls at high duty cycles (HDCs) and separate ...
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Evolutionary origins of ultrasonic hearing and laryngeal echolocation in bats inferred from morphological analyses of the inner ear
... echolocating bats [16,25]. Bats possess some of the widest frequency ranges of vocalisations and, therefore, assumed associated hearing sensitivities of any mammal group, with recorded vocalisations ran- ...
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Evolution of high duty cycle echolocation in bats
... HDC bats have a unique combination of four ...emit echolocation calls with long durations relative to their signal ...HDC bats contains anatomical modifications in the cochlea and an ...
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Flight and echolocation behaviour of whiskered bats commuting along a hedgerow: range dependent sonar signal design, Doppler tolerance and evidence for `acoustic focussing'
... In echolocation, a general conflict occurs between localisation and detection, with signals that are well adapted for long-range detection being typically long and ...why bats facing close-range orientation ...
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Adaptive echolocation behavior in bats for the analysis of auditory scenes
... Echolocating bats emit sonar pulses and listen to returning echoes to probe their ...surroundings. Bats adapt their echolocation call design to cope with dynamic changes in the acoustic environment, ...
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Prey capture success revealed by echolocation signals in pipistrelle bats (Pipistrellus pygmaeus)
... microchiropteran bats use echolocation or biosonar signals to orient and locate ...hunting bats capture prey either with the wing or the tail ...insectivorous bats hunting insects on the wing ...
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The adaptive function of tiger moth clicks against echolocating bats: an experimental and synthetic approach
... echolocating bats and moths has long fascinated biologists (Roeder, 1967; Fullard, 1998; Miller and Surlykke, 2001; Jones and Rydell, 2003; Waters, ...bat echolocation calls – has made this a particularly ...
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The peripheral auditory characteristics of noctuid moths: information encoding and endogenous noise
... by bats, the moth must interpret information from its auditory system to provide a reliable indicator of the presence or absence of bats in its ...the echolocation calls of a foraging bat from ...
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