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Vocal cues indicate level of arousal in infant African elephant roars.
Arousal-based physiological changes influence acoustic features of vocalizations in mammals. In particular, nonlinear phenomena are thought to convey information about the caller's arousal state.Expand
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Information content and acoustic structure of male African elephant social rumbles
Until recently, the prevailing theory about male African elephants (Loxodonta africana) was that, once adult and sexually mature, males are solitary and targeted only at finding estrous females.Expand
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An Asian Elephant Imitates Human Speech
Summary Vocal imitation has convergently evolved in many species, allowing learning and cultural transmission of complex, conspecific sounds, as in birdsong [1, 2]. Scattered instances also exist ofExpand
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Visualizing Sound Emission of Elephant Vocalizations: Evidence for Two Rumble Production Types
TLDR
We used a sound visualization method (an acoustic camera) to record rumbles of five captive African elephants during spatial separation and subsequent bonding situations. Expand
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Towards an automated acoustic detection system for free-ranging elephants
TLDR
We present a method for the automated detection of elephant vocalizations under unconstrained field conditions that is robust to the diverse noise sources present in the field. Expand
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Establishing the fundamentals for an elephant early warning and monitoring system
TLDR
We present a method for the automated detection of elephant rumbles that is robust to the diverse noise sources present in situ. Expand
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Sexual dimorphism in African elephant social rumbles
This study used the source and filter theory approach to analyse sex differences in the acoustic features of African elephant (Loxodonta africana) low-frequency rumbles produced in social contextsExpand
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How Low Can You Go? Physical Production Mechanism of Elephant Infrasonic Vocalizations
The Song of the Elephant In mammals, vocal sound production generally occurs in one of two ways, either through muscular control—as when a cat purrs or, more commonly, by air passing through theExpand
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Vocal learning in elephants: neural bases and adaptive context
In the last decade clear evidence has accumulated that elephants are capable of vocal production learning. Examples of vocal imitation are documented in African (Loxodonta africana) and AsianExpand
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Acoustic Features Indicate Arousal in Infant Giant Panda Vocalisations
Infant giant pandas are highly vocal during the first few weeks of life, producing vocalisations that are characterised by noisy, aperiodic segments. The aperiodic character of many animalExpand
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