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- W752092415 abstract "We describe how near-field audio recording using a pocket digital sound recorder can usefully document volcanic activity, demonstrating the approach at Yasur, Vanuatu in May 2014. Prominent emissions peak at 263 Hz, interpreted as an organ-pipe mode. High-pass filtering was found to usefully discriminate volcano vent noise from wind noise, and autocorrelation of the high pass acoustic power reveals a prominent peak in exhalation intervals of ~ 2.5, 4 and 8 s, with a number of larger explosive events at ~ 200 s intervals. We suggest that this compact and inexpensive audio instrumentation can usefully supplement other field monitoring such as seismic or infrasound. A simple estimate of acoustic power interpreted with a dipole jet noise model yielded vent velocities too low to be compatible with pyroclast emission, suggesting difficulties with this approach at audio frequencies (perhaps due to acoustic absorption by volcanic gases)." @default.
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- W752092415 date "2016-08-01" @default.
- W752092415 modified "2023-10-03" @default.
- W752092415 title "The roar of Yasur: Handheld audio recorder monitoring of Vanuatu volcanic vent activity" @default.
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- W752092415 doi "https://doi.org/10.1016/j.jvolgeores.2015.06.019" @default.
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