Our work

Ship acoustics and underwater acoustic signatures

Various sources of noise, like combustion engines, gearboxes, hydraulic pumps and propellers, can cause high levels of noise in and around ships. Noise control is thus important to boosting the comfort of passengers and crew and reducing the nuisance to the surroundings - both above and below water - as well as the vulnerability of the ship to underwater weapons with acoustic sensors.

TNO has more than fifty years' experience in ship acoustics. Both the Netherlands Royal Navy and the shipbuilding industry and its suppliers use the knowledge and expertise that TNO has gained within its research programmes supported by government, ship owners and shipyards. The organisation has a broad package of analytical, numerical and experimental tools. The knowledge and expertise are used for, among other things, the control of underwater acoustic signatures. Weapons, like sea mines and torpedoes use underwater sensors to detect, classify and localise their targets. Control over the underwater acoustic signatures makes it more difficult for an adversary top successfully employ these weapons.

Due to the increased concern about the disturbance of marine life by the underwater noise of ships, this topic has become increasingly important for the commercial shipping industry. TNO offers consultancy and research activities aimed at a cost-effective control of the acoustic signature.

Our work

Platform signatures

The signature of a naval platform is crucial for both its operational performance and its survivability (including recoverability). Read more

Marja Eijkman new Managing Director Unit Defence, Safety & Security

21 January 2020
We are pleased to announce that Ir. M.J. (Marja) Eijkman (54) will join TNO on 16 April 2020 as Managing Director of the unit Defence, Safety & Security, succeeding Henk Geveke. Mrs Eijkman has broad... Read more

NetForce Command: an alternative for command and control in a changing world

12 December 2019
What happens if hierarchical command and control no longer work in the hyper-connective world of tomorrow? Today, at Innovation in Defence in The Hague, one of TNO’s leading research groups presented the... Read more

Innovative crisis management solutions assessed in realistic simulation of a flooding scenario in The Netherlands

23 May 2019
On 22nd and 23rd May 2019, five innovative solutions were assessed in a realistic simulation of a flooding scenario in The Hague, The Netherlands. The simulation was part of a two-day tabletop DRIVER+... Read more


Dr. ir. Christ de Jong

  • ship acoustics
  • underwater sound


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