Modeling acoustic propagation of airgun array pulses recorded on tagged sperm whales (Physeter macrocephalus)
Author Posting. © Acoustical Society of America, 2006. This article is posted here by permission of Acoustical Society of America for personal use, not for redistribution. The definitive version was published in Journal of the Acoustical Society of America 120 (2006): 4100-4114, doi:10.1121/1.235970...
Published in: | The Journal of the Acoustical Society of America |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Acoustical Society of America
2006
|
Subjects: | |
Online Access: | https://hdl.handle.net/1912/2334 |
id |
ftwhoas:oai:darchive.mblwhoilibrary.org:1912/2334 |
---|---|
record_format |
openpolar |
spelling |
ftwhoas:oai:darchive.mblwhoilibrary.org:1912/2334 2023-05-15T17:59:23+02:00 Modeling acoustic propagation of airgun array pulses recorded on tagged sperm whales (Physeter macrocephalus) DeRuiter, Stacy L. Tyack, Peter L. Lin, Ying-Tsong Newhall, Arthur E. Lynch, James F. Miller, Patrick J. O. 2006-12 application/pdf https://hdl.handle.net/1912/2334 en_US eng Acoustical Society of America https://doi.org/10.1121/1.2359705 Journal of the Acoustical Society of America 120 (2006): 4100-4114 https://hdl.handle.net/1912/2334 doi:10.1121/1.2359705 Journal of the Acoustical Society of America 120 (2006): 4100-4114 doi:10.1121/1.2359705 Underwater sound Bioacoustics Acoustic intensity Acoustic waveguides Acoustic pulses Parabolic equations Time-of-arrival estimation Acoustic arrays Article 2006 ftwhoas https://doi.org/10.1121/1.2359705 2022-05-28T22:57:33Z Author Posting. © Acoustical Society of America, 2006. This article is posted here by permission of Acoustical Society of America for personal use, not for redistribution. The definitive version was published in Journal of the Acoustical Society of America 120 (2006): 4100-4114, doi:10.1121/1.2359705. In 2002 and 2003, tagged sperm whales (Physeter macrocephalus) were experimentally exposed to airgun pulses in the Gulf of Mexico, with the tags providing acoustic recordings at measured ranges and depths. Ray trace and parabolic equation (PE) models provided information about sound propagation paths and accurately predicted time of arrival differences between multipath arrivals. With adequate environmental information, a broadband acoustic PE model predicted the relative levels of multipath arrivals recorded on the tagged whales. However, lack of array source signature data limited modeling of absolute received levels. Airguns produce energy primarily below 250 Hz, with spectrum levels about 20–40 dB lower at 1 kHz. Some arrivals recorded near the surface in 2002 had energy predominantly above 500 Hz; a surface duct in the 2002 sound speed profile helps explain this effect, and the beampattern of the source array also indicates an increased proportion of high-frequency sound at near-horizontal launch angles. These findings indicate that airguns sometimes expose animals to measurable sound energy above 250 Hz, and demonstrate the influences of source and environmental parameters on characteristics of received airgun pulses. The study also illustrates that on-axis source levels and simple geometric spreading inadequately describe airgun pulse propagation and the extent of exposure zones. Funding for this work was provided by the Office of Naval Research, the U.S. Department of the Interior Minerals Management Service Cooperative Agreements Nos. 1435-01-02- CA-85186 and NA87RJ0445, and the Industry Research Funding Coalition. S.L.D.R. was supported by a National Science Foundation Graduate Research Fellowship. Article in Journal/Newspaper Physeter macrocephalus Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) The Journal of the Acoustical Society of America 120 6 4100 4114 |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
English |
topic |
Underwater sound Bioacoustics Acoustic intensity Acoustic waveguides Acoustic pulses Parabolic equations Time-of-arrival estimation Acoustic arrays |
spellingShingle |
Underwater sound Bioacoustics Acoustic intensity Acoustic waveguides Acoustic pulses Parabolic equations Time-of-arrival estimation Acoustic arrays DeRuiter, Stacy L. Tyack, Peter L. Lin, Ying-Tsong Newhall, Arthur E. Lynch, James F. Miller, Patrick J. O. Modeling acoustic propagation of airgun array pulses recorded on tagged sperm whales (Physeter macrocephalus) |
topic_facet |
Underwater sound Bioacoustics Acoustic intensity Acoustic waveguides Acoustic pulses Parabolic equations Time-of-arrival estimation Acoustic arrays |
description |
Author Posting. © Acoustical Society of America, 2006. This article is posted here by permission of Acoustical Society of America for personal use, not for redistribution. The definitive version was published in Journal of the Acoustical Society of America 120 (2006): 4100-4114, doi:10.1121/1.2359705. In 2002 and 2003, tagged sperm whales (Physeter macrocephalus) were experimentally exposed to airgun pulses in the Gulf of Mexico, with the tags providing acoustic recordings at measured ranges and depths. Ray trace and parabolic equation (PE) models provided information about sound propagation paths and accurately predicted time of arrival differences between multipath arrivals. With adequate environmental information, a broadband acoustic PE model predicted the relative levels of multipath arrivals recorded on the tagged whales. However, lack of array source signature data limited modeling of absolute received levels. Airguns produce energy primarily below 250 Hz, with spectrum levels about 20–40 dB lower at 1 kHz. Some arrivals recorded near the surface in 2002 had energy predominantly above 500 Hz; a surface duct in the 2002 sound speed profile helps explain this effect, and the beampattern of the source array also indicates an increased proportion of high-frequency sound at near-horizontal launch angles. These findings indicate that airguns sometimes expose animals to measurable sound energy above 250 Hz, and demonstrate the influences of source and environmental parameters on characteristics of received airgun pulses. The study also illustrates that on-axis source levels and simple geometric spreading inadequately describe airgun pulse propagation and the extent of exposure zones. Funding for this work was provided by the Office of Naval Research, the U.S. Department of the Interior Minerals Management Service Cooperative Agreements Nos. 1435-01-02- CA-85186 and NA87RJ0445, and the Industry Research Funding Coalition. S.L.D.R. was supported by a National Science Foundation Graduate Research Fellowship. |
format |
Article in Journal/Newspaper |
author |
DeRuiter, Stacy L. Tyack, Peter L. Lin, Ying-Tsong Newhall, Arthur E. Lynch, James F. Miller, Patrick J. O. |
author_facet |
DeRuiter, Stacy L. Tyack, Peter L. Lin, Ying-Tsong Newhall, Arthur E. Lynch, James F. Miller, Patrick J. O. |
author_sort |
DeRuiter, Stacy L. |
title |
Modeling acoustic propagation of airgun array pulses recorded on tagged sperm whales (Physeter macrocephalus) |
title_short |
Modeling acoustic propagation of airgun array pulses recorded on tagged sperm whales (Physeter macrocephalus) |
title_full |
Modeling acoustic propagation of airgun array pulses recorded on tagged sperm whales (Physeter macrocephalus) |
title_fullStr |
Modeling acoustic propagation of airgun array pulses recorded on tagged sperm whales (Physeter macrocephalus) |
title_full_unstemmed |
Modeling acoustic propagation of airgun array pulses recorded on tagged sperm whales (Physeter macrocephalus) |
title_sort |
modeling acoustic propagation of airgun array pulses recorded on tagged sperm whales (physeter macrocephalus) |
publisher |
Acoustical Society of America |
publishDate |
2006 |
url |
https://hdl.handle.net/1912/2334 |
genre |
Physeter macrocephalus |
genre_facet |
Physeter macrocephalus |
op_source |
Journal of the Acoustical Society of America 120 (2006): 4100-4114 doi:10.1121/1.2359705 |
op_relation |
https://doi.org/10.1121/1.2359705 Journal of the Acoustical Society of America 120 (2006): 4100-4114 https://hdl.handle.net/1912/2334 doi:10.1121/1.2359705 |
op_doi |
https://doi.org/10.1121/1.2359705 |
container_title |
The Journal of the Acoustical Society of America |
container_volume |
120 |
container_issue |
6 |
container_start_page |
4100 |
op_container_end_page |
4114 |
_version_ |
1766168178457575424 |