Abstract
The directionality of ambient noise in an Arctic tidewater
glacier bay was measured using two horizontally spaced, broadband
hydrophones. Segments of noise were divided into two frequency bands
and analyzed for arrival angle. These data show that different classes of
source radiate noise in distinct spectral bands and are spatially diverse.
A previously unidentified source, the interaction of surface gravity
waves with underside of ice ledges at the periphery of icebergs, is
described. The generation of noise by ice-wave interaction suggests that
surface waves should be measured if ambient noise is to be used to
monitor ice dynamics in glacial fjords.
glacier bay was measured using two horizontally spaced, broadband
hydrophones. Segments of noise were divided into two frequency bands
and analyzed for arrival angle. These data show that different classes of
source radiate noise in distinct spectral bands and are spatially diverse.
A previously unidentified source, the interaction of surface gravity
waves with underside of ice ledges at the periphery of icebergs, is
described. The generation of noise by ice-wave interaction suggests that
surface waves should be measured if ambient noise is to be used to
monitor ice dynamics in glacial fjords.
| Original language | English |
|---|---|
| Article number | EL350 |
| Number of pages | 7 |
| Journal | Journal of the Acoustical Society of America |
| Volume | 136 |
| Issue number | 5 |
| Early online date | 15 Oct 2014 |
| DOIs | |
| Publication status | Published - 15 Oct 2014 |
Keywords
- Glaciers
- Ice
- Noise propagation
- Acoustic noise
- Microphones