Hot Topic- Killer Whales and Vessel Noise
Measuring and mitigating the potential impacts of vessel noise on endangered killer whales Underwater sound associated with commercial vessel traffic is one, recognized threat to the southern resident...
View ArticleDecoding the hum of submarine volcanic eruptions
Earthquakes and other geologic events produce acoustic signals that can be measured and monitored on land and underwater. Seismic energy from submarine earthquakes is converted into acoustic energy at...
View ArticleChanges in Baleen Whale Vocalizations
Decadal Decreases in the Frequency (Pitch) of Baleen Whale Vocalizations Blue whales are the largest living mammal species. Their long, slender bodies can reach lengths of 30.5 m (100 ft) and weigh up...
View ArticleUnderwater Acoustic Impacts of COVID-19
The novel coronavirus (COVID-19) has had a major impact on society around the globe. Shelter-in-place orders and non-essential travel bans have had significant effects at all levels, from local to...
View ArticleHot Topic – Sound waves from earthquakes can reveal changes in ocean temperature
Background One of the ocean’s response to global climate change is a rise in average water temperature. Where in the ocean the warming occurs and the rate at which it occurs are of great interest to...
View ArticleSeafloor exploration with fin whale calls
Illustration of a seismic survey with two ships, one with the sound source and the other with an array of hydrophones. Image Credit: DOSITS. At the bottom of the ocean, there are layers of sediments...
View ArticleGlacial Calving in the Arctic Produces Record Source Levels
Iceberg calving is a natural process, occurring when a rift opens in the edge of a glacier, caused by wind or water erosion, melting ice, or other events, resulting in an iceberg breaking away and...
View ArticleUsing Drones to Deploy Digital Acoustic Tags
On June 8, 2022, the Bureau of Ocean Energy Management (BOEM) and the National Oceanic and Atmospheric Administration’s (NOAA) Stellwagen Bank National Marine Sanctuary announced the successful use of...
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View ArticleDistributed acoustic sensing (DAS): Shedding light on passive acoustics
A network of fiber-optic telecommunication cables spans 1.2 million km of the seafloor, covering both deep ocean and coastal areas around the globe. The cables are used to transmit phone calls,...
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