News tagged with acoustic

New system helps explain salmon migration

A new acoustic telemetry system tracks the migration of juvenile salmon using one-tenth as many fish as comparable methods, suggests a paper published in the January edition of the American Fisheries Society journal Fisheries. ...

dateJan 08, 2010 in Ecology
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Lasers generate underwater sound

Scientists at the Naval Research Laboratory (NRL) are developing a new technology for use in underwater acoustics. The new technology uses flashes of laser light to remotely create underwater sound. The new acoustic source ...

dateSep 04, 2009 in General Physics
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When a whistle beats a tweet

Biologists have discovered that a species of Australian pigeon has a secret way of alerting fellow birds to predators -- a "whistle" emitted by flapping wings when the bird takes off in alarm.

dateSep 01, 2009 in Plants & Animals
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How noise pollution is changing animal behaviour

Noise pollution, generally an unintended byproduct of urbanisation, transport and industry, is a key characteristic of human development and population growth. In some cases, it is produced intentionally, for example when ...

dateDec 18, 2015 in Ecology
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