Acoustics

1. Acoustic tests and computations, including development of procedures, numerical models and computer software, in support of design work on ships, submarines and submersible vehicles for:

   • acoustic tank tests of model ship structures in order to evaluate noise radiation of individual hull components;
   • variable-pressure tank tests of marine system components in order to evaluate noise reflection and transmittance factors under different hydrostatic pressures;
   • resilient structures and fixtures in order to evaluate their service life characteristics;
   • main and auxiliary (reserve) propulsors;
   • various items of ship and power-generating equipment or their large-scale models in order to evaluate vibration and acoustics characteristics (sound power levels, noise levels, vibration accelerations, vibration velocities);
   • ship self-noise and flow noise levels in sonar domes.

2. Development of guidelines, normative and regulatory documents for designing and upgrading ships, submarines and submersibles in terms of their hydroacoustic performances:

   • acoustic-wise design of ship hulls;

   • development of hydroacoustic and vibration damping coatings;

   • resilient mountings;

   • low-noise equipment;

   • noise measurements and source identification;

   • reduction of noise hampering onboard sonar performance .

3. Development of measurement and data analysis instrumentation.

4. Development of measures for indoor and outdoor noise reduction.