منابع مشابه
Sound-producing sand avalanches
Sound-producing sand grains constitute one of nature’ s more puzzling and least understood physical phenomena. They occur naturally in two distinct types: booming and squeaking sands. Although both varieties of sand produce unexpectedly pure acoustic emissions when sheared, they diŒer in their frequency range and duration of emission, as well as the environment in which they tend to be found. L...
متن کاملSound production in the tiger-tail seahorse Hippocampus comes: Insights into the sound producing mechanisms.
Acoustic signals of the tiger-tail seahorse (Hippocampus comes) during feeding were studied using wavelet transform analysis. The seahorse "click" appears to be a compounded sound, comprising three acoustic components that likely come from two sound producing mechanisms. The click sound begins with a low-frequency precursor signal, followed by a sudden high-frequency spike that decays quickly, ...
متن کاملFurther insight into the sound-producing mechanism of clownfishes: what structure is involved in sound radiation?
It was recently demonstrated that clownfishes produce aggressive sounds by snapping their jaw teeth. To date, only the onset of the sound has been studied, which raises the question, what structure is involved in sound radiation? Here, a combination of different approaches has been used to determine the anatomical structure(s) responsible for the size-related variations observed in sound durati...
متن کاملAnti-bat flight activity in sound-producing versus silent moths
The ultrasonic clicks produced by some tiger moths — all of which possess bat-detecting ears — are effective acoustic aposematic or mimetic signals, conferring protection against aerial hawking bats. Clicks are produced in response to bat echolocation calls. Palatable, silent non-tiger-moth species with bat-detecting ears fly away from distant bats and effect erratic flight maneuvers or stop fl...
متن کاملAlternative voice after laryngectomy using a sound-producing voice prosthesis.
OBJECTIVE To improve the voice quality of female laryngectomees and/or laryngectomees with a hypotonic pharyngoesophageal (PE) segment by means of a pneumatic artificial source of voice incorporated in a regular tracheoesophageal (TE) shunt valve. STUDY DESIGN Experimental, randomized, crossover trial. METHODS The new sound source consists of a single silicone lip, which performs an oscilla...
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ژورنال
عنوان ژورنال: Nature
سال: 1877
ISSN: 0028-0836,1476-4687
DOI: 10.1038/017011b0