The manuscript, written by Rachel Lennon and Shannon Merkle with co-authors
Jonas Teilmann, and from Seiche: Chris Pierpoint and Lorenzo Scala. Published in
Marine Mammal Science, draws on long-term passive acoustic monitoring (PAM)
data collected in the Little Belt strait, Denmark. The analysis utilised data from
Seiche’s cable-to-shore PAM system at Middelfart, enabling continuous monitoring of
porpoise echolocation behaviour alongside detailed vessel traffic records.

By comparing porpoise acoustic detections with periods of vessel traffic, the
researchers found that harbour porpoises “buzzed” less when boats and ships were
nearby. Buzzes are short sounds used by porpoises when feeding and socialising,
and reductions of up to 45% were observed during the busiest vessel traffic periods,
particularly during summer daytime hours when the Little Belt is most active.

Harbour porpoises have a rapid metabolism and feed almost constantly, meaning
reductions in feeding and social activity could have important implications. The study
notes that the Little Belt is used by an endangered population of harbour porpoises,
and that chronic vessel traffic in this narrow strait may therefore be of particular
concern.

The study adds to a growing understanding of how underwater noise and increasing
vessel traffic affect the marine environment, particularly noise-sensitive species such
as harbour porpoises. The researchers note that measures including reduced vessel
speeds and consideration of vessel numbers and distribution in protected areas
could help to limit disturbance.

Seiche is proud to support collaborative, science-driven research that advances
understanding of anthropogenic impacts on the marine environment and contributes
evidence to support sustainable use of coastal waters.

The post Porpoises ‘buzz’ less when boats are nearby! appeared first on Seiche.

The post Offshore Wind Growth Partnership appeared first on Seiche.

Ross brings with him over 20 years of experience working on marine mammals and, within that time, he has worked in various capacities on over 30 major marine infrastructure projects, globally, with a particular focus on offshore wind.

He has worked within academia, government and environmental consultancy; this experience across sectors provides him with a unique understanding and perspective of key consenting and conservation and management issues relating to marine mammals. His career has largely focused on addressing critical knowledge gaps, alongside developing and advising on monitoring of marine mammal populations, and mitigation of potential impacts caused by human activities, particularly those relevant to underwater noise.

Ross will be an excellent addition to our Science Department at Seiche Ltd and we look forward to the great work ahead and the impact the team will make.

The post Seiche Welcomes Ross Culloch appeared first on Seiche.

Dan brings a wealth of experience and expertise in marine technology and innovation to Seiche. A
Naval Architect by training, he studied at the University of Southampton before embarking on a
diverse career encompassing fast vessel design, weight and stability analysis, and structural
engineering.

His passion for marine robotics led him to become a Chartered Engineer and establish ASV Ltd, a
pioneering company in the development and construction of unmanned surface vessels.
Following the sale of ASV Ltd to L3 Harris, Dan served as Chief Technology Officer at Ocean
Infinity for four years. He now leads RAD Propulsion, a company dedicated to advancing
technology for electric and smart boats.

In addition to his industry roles, Dan has contributed significantly to marine science as a Non-
Executive Director of the National Oceanography Centre over the past six years.

We are thrilled to have Dan on board and look forward to the valuable insights and leadership he
will bring to Seiche.

The post Seiche Welcomes Dan Hook as Non-Executive Director appeared first on Seiche.

To register or for more information, email training@seiche.com or visit our training page

The post Seiche Training Courses 2026 appeared first on Seiche.

The post David Hedgeland joins Seiche as Associate Director appeared first on Seiche.

Stay tuned for more updates as we uncover fascinating insights from the data collected during this project!

Photo credit: Deme Group

The post Moray West Offshore Wind Project appeared first on Seiche.

Our RTSM buoy is a lightweight, compact and scalable solution to collecting noise monitoring data. Data is collected in real-time via a hydrophone deployed beneath the remote buoy, making the set-up, management and collection of data seamless in real time.

Applications include:

• Monitoring of offshore pile driving noise
• Real time monitoring of compliance with noise limits
• Live management of acoustic emissions during piling

Download our datasheet here for more information.

The post New Product Launch! RTSM Buoy appeared first on Seiche.

We’re thrilled to announce that we’ve been awarded the prestigious SafeContractor accreditation! This achievement reflects our commitment to prioritising our processes and maintaining the highest standards to quality, safety and sustainability.

The Alcumus SafeContractor Certification demonstrates to our clients and partners that they can have complete confidence in our ability to deliver projects with the utmost attention to safety and ethics. It also reaffirms our commitment to maintaining the highest industry standards, which sets us apart as a reliable and responsible choice in our sector.

A huge thanks to everyone who contributed to this certification at Seiche.

The post Seiche Group Awarded SafeContractor appeared first on Seiche.

Our mission? To unravel the mysteries of why this area is pivotal for porpoises, how their activity ebbs and flows over 24-hour cycles and throughout the year, and the impact of human activities on their behaviour. Using cutting-edge software, we remotely access and manage the system online, with audio and visual feeds streamed directly to the Seiche YouTube channel.

The displays vary depending on how researchers are viewing the data: you may see a spectrogram of ambient sounds, or a map with the tracks of larger vessels (AIS reports), or you may see a click detector display, where porpoise clicks are automatically displayed as red triangles. The audio you will hear blends low-frequency background noises with high-frequency porpoise clicks, that have been dropped down into our hearing range by signal processing techniques (the audible output of an envelope detector).

The post Underwater Sounds – Live stream appeared first on Seiche.