Ambient noise measurements in the northwest Indian Ocean
Ambient noise measurements were made at seven different locations during the first four months of 1977. The measurement systems included: two types of towed arrays, a bottomed array, and systems with sensors distributed throughout the water column. The noise in the frequency regime dominated by ship...
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| Veröffentlicht in: | IEEE journal of oceanic engineering 2005-04, Vol.30 (2), p.295-302 |
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| creator | Wagstaff, R.A. Aitkenhead, J.W. |
| description | Ambient noise measurements were made at seven different locations during the first four months of 1977. The measurement systems included: two types of towed arrays, a bottomed array, and systems with sensors distributed throughout the water column. The noise in the frequency regime dominated by shipping was found to be extremely high with a spectrum level of 92 dB//1 /spl mu/Pa at 50 Hz. These high levels were attributed to the high-density shipping. Horizontal directionality of the noise varied from site to site, ranging from highly directional to nearly nondirectional. The character of the directionality was highly dependent on the site position relative to shipping lanes. The noise showed very little dependence on depth. |
| doi_str_mv | 10.1109/JOE.2004.836994 |
| format | Article |
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The measurement systems included: two types of towed arrays, a bottomed array, and systems with sensors distributed throughout the water column. The noise in the frequency regime dominated by shipping was found to be extremely high with a spectrum level of 92 dB//1 /spl mu/Pa at 50 Hz. These high levels were attributed to the high-density shipping. Horizontal directionality of the noise varied from site to site, ranging from highly directional to nearly nondirectional. The character of the directionality was highly dependent on the site position relative to shipping lanes. 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The measurement systems included: two types of towed arrays, a bottomed array, and systems with sensors distributed throughout the water column. The noise in the frequency regime dominated by shipping was found to be extremely high with a spectrum level of 92 dB//1 /spl mu/Pa at 50 Hz. These high levels were attributed to the high-density shipping. Horizontal directionality of the noise varied from site to site, ranging from highly directional to nearly nondirectional. The character of the directionality was highly dependent on the site position relative to shipping lanes. The noise showed very little dependence on depth.</description><subject>Acoustic measurements</subject><subject>Acoustic noise</subject><subject>Ambient noise</subject><subject>Indian Ocean</subject><subject>Marine vehicles</subject><subject>Noise level</subject><subject>Noise measurement</subject><subject>Oceans</subject><subject>Sea measurements</subject><subject>Sensor arrays</subject><subject>Underwater acoustics</subject><subject>Working environment noise</subject><issn>0364-9059</issn><issn>1558-1691</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2005</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNqNkU1LAzEQhoMoWKtnD14WD962zeRrk2MpVSuFXvQc0t1ZuqWbrcku4r83pYLgRZnDMDPPO8zwEnILdAJAzfRlvZgwSsVEc2WMOCMjkFLnoAyckxHlSuSGSnNJrmLcUQpCFGZE9KzdNOj7zHdNxKxFF4eAberErPFZv8U0Cf32A2OfLX3VOJ-tS3T-mlzUbh_x5juPydvj4nX-nK_WT8v5bJWXXEOfM82gxprpVFW8EFyC4pVWeuO4kpURZeEooCqgrBx1JSpWa6O0UDU46Wo-Jg-nvYfQvQ_pCts2scT93nnshmiZNoxDir9Bypj5DwiUSq1UAu9_gbtuCD59a7XmggkFRYKmJ6gMXYwBa3sITevCpwVqj8bYZIw9GmNPxiTF3UnRIOIPLRmTVPMvq9uG9A</recordid><startdate>20050401</startdate><enddate>20050401</enddate><creator>Wagstaff, R.A.</creator><creator>Aitkenhead, J.W.</creator><general>IEEE</general><general>The Institute of Electrical and Electronics Engineers, Inc. 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The measurement systems included: two types of towed arrays, a bottomed array, and systems with sensors distributed throughout the water column. The noise in the frequency regime dominated by shipping was found to be extremely high with a spectrum level of 92 dB//1 /spl mu/Pa at 50 Hz. These high levels were attributed to the high-density shipping. Horizontal directionality of the noise varied from site to site, ranging from highly directional to nearly nondirectional. The character of the directionality was highly dependent on the site position relative to shipping lanes. The noise showed very little dependence on depth.</abstract><cop>New York</cop><pub>IEEE</pub><doi>10.1109/JOE.2004.836994</doi><tpages>8</tpages></addata></record> |
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| source | IEEE Electronic Library (IEL) |
| subjects | Acoustic measurements Acoustic noise Ambient noise Indian Ocean Marine vehicles Noise level Noise measurement Oceans Sea measurements Sensor arrays Underwater acoustics Working environment noise |
| title | Ambient noise measurements in the northwest Indian Ocean |
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