New sensors predict underwater noise

by Halimat Olunlade, Social Media Manager

Photo credit: Tom Fisk

Underwater noise remains a big problem for marine life. Recently, South Korean researchers have developed the first hull-mounted sensor system for predicting underwater noise. Though not intended for noise monitoring research, this technology could be revolutionary in analyzing the breadth of manmade noise underwater.

Underwater noise has been proven harmful to marine life, disrupting vital communication patterns essential for safety, feeding and reproduction. The quest for green energy, such as pile driving for offshore wind development, has unfortunately ushered more noise into our seas. These activities can disturb breeding grounds, feeding behaviors and development of nearby marine life.

The new sensors can continuously monitor the acoustic footprint of ocean vessels in real time, providing unprecedented data on how ships contribute to the underwater soundscape. What makes this innovation particularly promising is its ability to deliver continuous monitoring with minimal equipment, achieving a prediction accuracy within 4 decibels of the actual level during real-world testing.

Unlike traditional methods, that require intermittent data collection in controlled conditions, this hull-attached system works during normal ship operations, collecting data that could help researchers better understand the overall impact of vessel noise on marine ecosystems.

As shipping routes expand and offshore development accelerates, having precise, real-time data about underwater noise pollution is critical for developing effective mitigation strategies that protect both marine life and maritime industries.