BPH - news, views, and questions, page-182

The report does mention Pep11, it even has an additional link to a Herald Sun article on Pep11.

(Extract only)

Dr Sylvia Earle, a renowned marine biologist, describes undersea noise pollution as like “the death of a thousand cuts”.

An offshore gas drilling project proposed by Advent Energy involving plans to drill for gas in an area covering 4500 square kilometres of ocean from Port Stephens to the central coast of NSW is just the latest project to raise major concerns over man-made ocean noise.

Seismic surveys typically involve ships towing an air gun that fires a pulse of sound every 8-12 seconds. Noise from a single airgun survey can blanket an area of more than 300,000 square kilometres, raising background noise levels 100-fold continuously for weeks or even months.