OES-Environmental distributes metadata forms (questionnaires) to solicit information from researchers around the world who are exploring the environmental effects of marine renewable energy. This page provides a description and contact information related to the research. Content is updated on an annual basis.

Noise characterization of a subsea tidal kite

Study Status: 
Princple Investigator Contact Information: 

Name: Pál Schmitt

Address: Queen’s University Belfast, 12-13 The Strand, Portaferry, BT22 1PF, Northern Ireland, UK

Email: p.schmitt@qub.ac.uk

Project Description: 

This paper presents the first measurement of the sound emissions of a subsea tidal kite. (anchored to the sea floor by a tether and flying in a figure-eight configuration in the water column) operating in field conditions. Challenges in the measurement and post-processing of the data are detailed. Results are presented for three operating conditions of the kite: (1) varying turbine rotations per minute (RPM), (2) varying kite speed, and (3) a twisted tether.

Funding Source: 

This project has received funding from the European Union’s Horizon 2020 research and innovation program under Grant Agreement No. 654438

Location of Research: 

Strangford Narrows, Northern Ireland

Project Aims: 

To describe the noise produced from a quarter-scale subsea tidal kite under operating field conditions.

Project Progress: 


Key Findings: 

Kite speed and variation of the tether twist have less influence on overall sound levels than does turbine RPM, however significant changes to the noise emissions have been identified. The untwisted tether shows a peak in SPL around 100 Hz which is missing in the twisted configuration.

Related Publications: 

Schmitt, P.; Pine, M.; Culloch, R.; Lieber, L.; Kregting, L. (2018). Noise characterization of a subsea tidal kite. Journal of the Acoustical Society of America, 144(5), 1-6. https://tethys.pnnl.gov/publications/noise-characterization-subsea-tidal-kite

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