Tech Briefs Magazine - October 2021 - 34a
RESEARCH SPOTLIGHT
University of Bristol, United Kingdom
INVESTIGAINVESTIGATINGTING
VIBRO VIBROACOUSTICACOUSTIC
PROPERTIES PROPERTIES IN MOTH
WINGS WINGS FOR ACOUSTIC
CAMOUFLAGE CAMOUFLAGE
IN MOTH
FOR ACOUSTIC
Certain moths have special scaled wings that exhibit acoustic
camouflaging properties, hiding them from bats' echolocation.
Researchers at the University of Bristol sought to model this effect
to better understand the vibroacoustic phenomena at play - seeing
potential for broadband acoustic camouflage in other areas.
by BRIANNE CHRISTOPHER
FIGURE 1
34a COMSOL NEWS
Intro
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Have you ever looked at the ground, or a tree
branch, or a leaf on a bush - and all of a
sudden, it moves? Plenty of insects and arachnids
camouflage themselves from predators by
blending in with their surroundings. For instance,
the orchid mantis has wings that look just
like the delicate buds of an orchid flower; the
Phasmatodea, also known as the " stick bug " , has
arms and legs that bear an uncanny resemblance
to little brown twigs; and the Luna moth has
fluorescent green wings that perfectly match
bright leaves on a tree.
However, this type of visual camouflage is a
moot point when trying to avoid one of the main
predators of insects: Bats do not see with their eyes,
but instead navigate and search for food using
echolocation. So what is a bug to do? As it turns
out, certain types of moths, like the Bunaea alcinoe,
or the cabbage tree emperor moth, have scaled
wings that provide acoustic camouflage, protecting
them from bats' advanced sonar detection.
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http://info.hotims.com/79418-936
Tech Briefs Magazine - October 2021
Table of Contents for the Digital Edition of Tech Briefs Magazine - October 2021
Tech Briefs Magazine - October 2021 - Intro
Tech Briefs Magazine - October 2021 - Sponsor
Tech Briefs Magazine - October 2021 - Cov1
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