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New study evaluates how different face masks affect the acoustics of speech
Researcher Ryan Corey recently heard from a friend who teaches at a school where some of the students have hearing loss. The friend wanted to know if he had any ideas to help her communicate with these students while wearing a mask to slow the spread of COVID-19. Corey, who also has hearing loss, did not know what to tell her. So, he headed to the Illinois Augmented Listening Laboratory to look for solutions.
Corey, an electrical and computer engineering postdoctoral researcher under professor Andrew Singer at the University of Illinois Urbana-Champaign, leads a team that studies audio signal processing, especially for listening devices like hearing aids. The results of the team s new study evaluating the acoustic effects of face masks on speech are published in
Disposable surgical masks best for being heard clearly when speaking, study finds
CHAMPAIGN, Ill. Researcher Ryan Corey recently heard from a friend who teaches at a school where some of the students have hearing loss. The friend wanted to know if he had any ideas to help her communicate with these students while wearing a mask to slow the spread of COVID-19. Corey, who also has hearing loss, did not know what to tell her. So, he headed to the Illinois Augmented Listening Laboratory to look for solutions.
Corey, an electrical and computer engineering postdoctoral researcher under professor Andrew Singer at the University of Illinois Urbana-Champaign, leads a team that studies audio signal processing, especially for listening devices like hearing aids. The results of the team s new study evaluating the acoustic effects of face masks on speech are published in The Journal of the Acoustical Society of America.
Weddell seals are chirping, whistling, and trilling under Antarctica’s ice at sound frequencies that humans can’t hear, report researchers.
Two years of recordings at a live-streaming underwater observatory in McMurdo Sound have captured nine types of tonal ultrasonic seal vocalizations that reach to 50 kilohertz. Humans hear in the sonic range of 20 to 20,000 hertz, or 20 kilohertz.
“It really sounds like you’re in the middle of a space battle in
Star Wars, laser beams and all.”
Weddell seals (
Leptonychotes weddelii), the world’s southernmost-ranging mammal, thrive under the continent’s sea ice, using their large teeth to create air holes. They can dive to 600 meters (1,969 feet) in search of prey and remain submerged for 80 minutes. Researchers had first identified 34 seal call types at sonic frequencies in 1982, tying the sounds to social interactions.
Under Antarctica s ice, Weddell seals produce ultrasonic vocalizations
EUGENE, Ore. Dec. 21, 2020 Weddell seals are chirping, whistling and trilling under Antarctica s ice at sound frequencies that are inaudible to humans, according to a research team led by University of Oregon biologists.
Two years of recordings at a live-streaming underwater observatory in McMurdo Sound have captured nine types of tonal ultrasonic seal vocalizations that reach to 50 kilohertz. Humans hear in the sonic range of 20 to 20,000 hertz, or 20 kilohertz.
The discovery is detailed in a paper published online Dec. 18 ahead of print the Journal of the Acoustical Society of America.
Weddell seals (Leptonychotes weddelii), the world s southernmost-ranging mammal, thrive under the continent s sea ice, using their large teeth to create air holes. They can dive to 600 meters in search of prey and remain submerged for 80 minutes. Researchers had first identified 34 seal call types at sonic frequencies in 1