Ward Rhianne, Gavrilov Alexander N, McCauley Robert D
Centre for Marine Science and Technology, Curtin University, Kent Street, Bentley, Western Australia, 6102, Australia
J Acoust Soc Am. 2017 Aug;142(2):EL231. doi: 10.1121/1.4998608.
Underwater passive acoustic recordings in the Southern and Indian Oceans off Australia from 2002 to 2016 have regularly captured a tonal signal of about 10 s duration at 22-28 Hz with a symmetrical bell-shaped envelope. The sound is often accompanied by short, higher frequency downsweeps and repeated at irregular intervals varying from 120 to 200 s. It is termed the "spot" call according to its appearance in spectrograms of long-time averaging. Although similar to the first part of an Antarctic blue whale Z-call, evidence suggests the call is produced by another great whale, with the source as yet not identified.
2002年至2016年期间，在澳大利亚附近的南大洋和印度洋进行的水下被动声学记录，经常捕捉到一种持续约10秒、频率为22 - 28赫兹、具有对称钟形包络的音调信号。这种声音通常伴随着短暂的高频下扫声，并以120至200秒不等的不规则间隔重复出现。根据其在长时间平均频谱图中的外观，它被称为“斑点”叫声。尽管它与南极蓝鲸Z叫声的第一部分相似，但有证据表明这种叫声是由另一种须鲸发出的，其来源尚未确定。
