Sounds Recorded in the Presence of an Adult and Calf Bowhead Whale, 'Balaena Mysticetus'.
Low-frequency sounds were recorded on 23 May 1978 in the presence of an adult bowhead whale and accompanying calf, near Point Barrow, Alaska. The ice conditions at that time were changing. The ice pack was moving toward the shore-fast ice, with the imminent possibility of total lead closure. Under t...
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ftdtic:ADA071883 2023-05-15T15:35:59+02:00 Sounds Recorded in the Presence of an Adult and Calf Bowhead Whale, 'Balaena Mysticetus'. Ljungblad,D K Leatherwood,S Dahlheim,M E NAVAL OCEAN SYSTEMS CENTER SAN DIEGO CA 1979-05-26 text/html http://www.dtic.mil/docs/citations/ADA071883 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA071883 en eng http://www.dtic.mil/docs/citations/ADA071883 APPROVED FOR PUBLIC RELEASE DTIC AND NTIS Acoustics *ACOUSTICS MARINE BIOLOGY FISHERIES LOW FREQUENCY UNDERWATER SOUND WHALES Text 1979 ftdtic 2016-02-20T16:33:49Z Low-frequency sounds were recorded on 23 May 1978 in the presence of an adult bowhead whale and accompanying calf, near Point Barrow, Alaska. The ice conditions at that time were changing. The ice pack was moving toward the shore-fast ice, with the imminent possibility of total lead closure. Under these conditions, sounds were detected 10 minutes before whales were sighted in the lead at an estimated distance of 400 to 500 m from our position. Of the 75 vocalizations recorded, 35 were of sufficient quality to be analyzed. These sounds were of two types, identified throughout this text as Type A, short duration sounds, and Type B, long duration sounds. Eighteen were Type A and ranged from 0.35 to 0.85 seconds in duration; the fundamental frequency ranged from 50 Hz to 580 Hz. In three instances, a Type A sound was followed immediately by a Type B sound. Fifteen Type B sounds ranged fgrom 0.65 to 2.56 seconds in duration, with the fundamental frequency ranging from 100 Hz to 195 Hz. Text Balaena mysticetus Barrow bowhead whale Point Barrow Alaska Defense Technical Information Center: DTIC Technical Reports database |
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Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Acoustics *ACOUSTICS MARINE BIOLOGY FISHERIES LOW FREQUENCY UNDERWATER SOUND WHALES |
spellingShingle |
Acoustics *ACOUSTICS MARINE BIOLOGY FISHERIES LOW FREQUENCY UNDERWATER SOUND WHALES Ljungblad,D K Leatherwood,S Dahlheim,M E Sounds Recorded in the Presence of an Adult and Calf Bowhead Whale, 'Balaena Mysticetus'. |
topic_facet |
Acoustics *ACOUSTICS MARINE BIOLOGY FISHERIES LOW FREQUENCY UNDERWATER SOUND WHALES |
description |
Low-frequency sounds were recorded on 23 May 1978 in the presence of an adult bowhead whale and accompanying calf, near Point Barrow, Alaska. The ice conditions at that time were changing. The ice pack was moving toward the shore-fast ice, with the imminent possibility of total lead closure. Under these conditions, sounds were detected 10 minutes before whales were sighted in the lead at an estimated distance of 400 to 500 m from our position. Of the 75 vocalizations recorded, 35 were of sufficient quality to be analyzed. These sounds were of two types, identified throughout this text as Type A, short duration sounds, and Type B, long duration sounds. Eighteen were Type A and ranged from 0.35 to 0.85 seconds in duration; the fundamental frequency ranged from 50 Hz to 580 Hz. In three instances, a Type A sound was followed immediately by a Type B sound. Fifteen Type B sounds ranged fgrom 0.65 to 2.56 seconds in duration, with the fundamental frequency ranging from 100 Hz to 195 Hz. |
author2 |
NAVAL OCEAN SYSTEMS CENTER SAN DIEGO CA |
format |
Text |
author |
Ljungblad,D K Leatherwood,S Dahlheim,M E |
author_facet |
Ljungblad,D K Leatherwood,S Dahlheim,M E |
author_sort |
Ljungblad,D K |
title |
Sounds Recorded in the Presence of an Adult and Calf Bowhead Whale, 'Balaena Mysticetus'. |
title_short |
Sounds Recorded in the Presence of an Adult and Calf Bowhead Whale, 'Balaena Mysticetus'. |
title_full |
Sounds Recorded in the Presence of an Adult and Calf Bowhead Whale, 'Balaena Mysticetus'. |
title_fullStr |
Sounds Recorded in the Presence of an Adult and Calf Bowhead Whale, 'Balaena Mysticetus'. |
title_full_unstemmed |
Sounds Recorded in the Presence of an Adult and Calf Bowhead Whale, 'Balaena Mysticetus'. |
title_sort |
sounds recorded in the presence of an adult and calf bowhead whale, 'balaena mysticetus'. |
publishDate |
1979 |
url |
http://www.dtic.mil/docs/citations/ADA071883 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA071883 |
genre |
Balaena mysticetus Barrow bowhead whale Point Barrow Alaska |
genre_facet |
Balaena mysticetus Barrow bowhead whale Point Barrow Alaska |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADA071883 |
op_rights |
APPROVED FOR PUBLIC RELEASE |
_version_ |
1766366321887412224 |