Lee Kevin M, Ballard Megan S, McNeese Andrew R, Wilson Preston S, Venegas Gabriel R, Zeh Mathew C, Rahman Abdullah F
Applied Research Laboratories, The University of Texas at Austin, Austin, Texas 78713, USA.
Walker Department of Mechanical Engineering, The University of Texas at Austin, Austin, Texas 78712, USA.
JASA Express Lett. 2023 Jan;3(1):010801. doi: 10.1121/10.0016752.
Acoustic propagation measurements were collected in a seagrass meadow in a shallow lagoon for periods of over 65 h in winter and 93 h in summer. A bottom-deployed sound source transmitted chirps (0.1-100 kHz) every 10 min that were received on a four-receiver horizontal hydrophone array. Oceanographic probes measured various environmental parameters. Daytime broadband acoustic attenuation was 2.4 dB greater in summer than winter, and the median received acoustic energy levels were 8.4 dB lower in summer compared to winter. These differences were attributed in part to seasonal changes in photosynthesis bubble production and above-ground seagrass biomass.
在一个浅泻湖的海草草甸中进行了声学传播测量，冬季测量时长超过65小时，夏季测量时长超过93小时。一个布设在海底的声源每隔10分钟发射一次啁啾信号（0.1 - 100千赫），信号由一个四接收器水平水听器阵列接收。海洋学探测器测量了各种环境参数。夏季白天的宽带声衰减比冬季大2.4分贝，夏季接收的声能水平中值比冬季低8.4分贝。这些差异部分归因于光合作用气泡产生和海草地上生物量的季节性变化。
