Measurements of mid-frequency bottom interacting signals in Jinhae bay located on the southern coast of Korea
-
Title
- Measurements of mid-frequency bottom interacting signals in Jinhae bay located on the southern coast of Korea
-
Author(s)
- 최지웅; 권혁종; 손수욱; 조성호; 박정수; 한주영
- KIOST Author(s)
- Cho, Sung Ho(조성호)
-
Alternative Author(s)
- 조성호
-
Publication Year
- 2016-10-12
-
Abstract
- Acoustic bottom interacting measurements were conducted in shallow water (nominal water depth of 60 m) in Jinhae bay, southern coast of Korea, using 4 to 12 kHz CW signals in May 2015 and 2016. The surficial sediment at a site is mainly composed of silty clay with a mean grain size of 8 phi. Since the seafloor is relatively soft, the bottom-bounced path was very weak compared to direct and sea-surface-bounced paths. On the other hand, a strong arrival reflected from the sub-sediment layer was received after the bottom-bounced arrival especially at lower frequencies. The arrival time difference between the arrival reflected from water-sediment interface and that reflected from the second interface is used to estimate the sound speed in the surficial sediment layer. In addition, the bottom loss as a function of grazing angle are estimated using the bottom-bounded path. Finally, the results are compared to the sedimentary structure imaged by chirp sonar survey. [Supported by Agency for Defense Development, Korea]posed of silty clay with a mean grain size of 8 phi. Since the seafloor is relatively soft, the bottom-bounced path was very weak compared to direct and sea-surface-bounced paths. On the other hand, a strong arrival reflected from the sub-sediment layer was received after the bottom-bounced arrival especially at lower frequencies. The arrival time difference between the arrival reflected from water-sediment interface and that reflected from the second interface is used to estimate the sound speed in the surficial sediment layer. In addition, the bottom loss as a function of grazing angle are estimated using the bottom-bounded path. Finally, the results are compared to the sedimentary structure imaged by chirp sonar survey. [Supported by Agency for Defense Development, Korea]
-
URI
- https://sciwatch.kiost.ac.kr/handle/2020.kiost/24549
-
Bibliographic Citation
- 5th Joint Meeting of the Acoustical Society of America and the Acoustical Society of Japan, pp.617, 2016
-
Publisher
- the Acoustical Society of America and the Acoustical Society of Japan
-
Type
- Conference
-
Language
- English
- Files in This Item:
-
There are no files associated with this item.
Items in ScienceWatch@KIOST are protected by copyright, with all rights reserved, unless otherwise indicated.