At the crux of the research was anthrophony: the drumbeat of industrialized society.

研究的关键是人声：工业化社会的鼓点。

The authors divided ocean sounds into three sources: biological, geological, and human—or biophony, geophony, and anthrophony.

作者将海洋声音分为三个来源：生物、地质和人类——或生物声学、地球声学和人类声学。