Printed in Great Britain © The Company of Biologists Limited 1986 DETECTION OF INFRASOUND BY THE ATLANTIC COD
Below about 50 kHz the level of ambient noise in the sea increases continuously towards lower frequencies. In the infrasound range the spectral slope is particularly steep. This low-frequency noise may propagate long distances with little attenuation, causing a directional pattern of infrasound in t...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.601.7082 2023-05-15T15:27:34+02:00 Printed in Great Britain © The Company of Biologists Limited 1986 DETECTION OF INFRASOUND BY THE ATLANTIC COD Sand Hans E. Karlsen The Pennsylvania State University CiteSeerX Archives 1986 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.601.7082 http://jeb.biologists.org/content/125/1/197.full.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.601.7082 http://jeb.biologists.org/content/125/1/197.full.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://jeb.biologists.org/content/125/1/197.full.pdf text 1986 ftciteseerx 2016-01-08T14:04:14Z Below about 50 kHz the level of ambient noise in the sea increases continuously towards lower frequencies. In the infrasound range the spectral slope is particularly steep. This low-frequency noise may propagate long distances with little attenuation, causing a directional pattern of infrasound in the sea. Using a standing-wave acoustic tube, we have studied the sensitivity of cod to infrasound down to 0-1 Hz by means of the cardiac conditioning technique. The threshold values, measured as particle acceleration, showed a steady decline towards lower frequencies below 10 Hz, reaching a value close to 10~sms~2at 0-1 Hz. The spectrum level at 0-1 Hz in the sea ranges between 120 and 180 dB (re 1 £*Pa), with corresponding particle accelerations from less than 10~6 to more than 10~4ms~z. The sensitivity of cod is thus sufficient to detect the highest levels of ambient infrasound, and we put forward the hypothesis that fish may utilize information about the infrasound pattern in the sea for orien-tation during migration, probably in addition to an array of other sensory inputs. Text atlantic cod Unknown |
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Open Polar |
collection |
Unknown |
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ftciteseerx |
language |
English |
description |
Below about 50 kHz the level of ambient noise in the sea increases continuously towards lower frequencies. In the infrasound range the spectral slope is particularly steep. This low-frequency noise may propagate long distances with little attenuation, causing a directional pattern of infrasound in the sea. Using a standing-wave acoustic tube, we have studied the sensitivity of cod to infrasound down to 0-1 Hz by means of the cardiac conditioning technique. The threshold values, measured as particle acceleration, showed a steady decline towards lower frequencies below 10 Hz, reaching a value close to 10~sms~2at 0-1 Hz. The spectrum level at 0-1 Hz in the sea ranges between 120 and 180 dB (re 1 £*Pa), with corresponding particle accelerations from less than 10~6 to more than 10~4ms~z. The sensitivity of cod is thus sufficient to detect the highest levels of ambient infrasound, and we put forward the hypothesis that fish may utilize information about the infrasound pattern in the sea for orien-tation during migration, probably in addition to an array of other sensory inputs. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Sand Hans E. Karlsen |
spellingShingle |
Sand Hans E. Karlsen Printed in Great Britain © The Company of Biologists Limited 1986 DETECTION OF INFRASOUND BY THE ATLANTIC COD |
author_facet |
Sand Hans E. Karlsen |
author_sort |
Sand |
title |
Printed in Great Britain © The Company of Biologists Limited 1986 DETECTION OF INFRASOUND BY THE ATLANTIC COD |
title_short |
Printed in Great Britain © The Company of Biologists Limited 1986 DETECTION OF INFRASOUND BY THE ATLANTIC COD |
title_full |
Printed in Great Britain © The Company of Biologists Limited 1986 DETECTION OF INFRASOUND BY THE ATLANTIC COD |
title_fullStr |
Printed in Great Britain © The Company of Biologists Limited 1986 DETECTION OF INFRASOUND BY THE ATLANTIC COD |
title_full_unstemmed |
Printed in Great Britain © The Company of Biologists Limited 1986 DETECTION OF INFRASOUND BY THE ATLANTIC COD |
title_sort |
printed in great britain © the company of biologists limited 1986 detection of infrasound by the atlantic cod |
publishDate |
1986 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.601.7082 http://jeb.biologists.org/content/125/1/197.full.pdf |
genre |
atlantic cod |
genre_facet |
atlantic cod |
op_source |
http://jeb.biologists.org/content/125/1/197.full.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.601.7082 http://jeb.biologists.org/content/125/1/197.full.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766357992487256064 |