Specifically tuned acoustic materials produced as individual tiles for adhesive application to the hull, casing and bridge fin of the submarine.
Anechoics
Energy absorbing materials to reduce target echo strength.
Transmission Loss
Materials used to decouple the hull from the water, to minimise radiated noise.
Reflective
Reducing the acoustic echo by reflecting the sound pulse away from the sounder.
rho-c products
Acoustically transparent materials for acoustic apertures.
Multi layer tiles
Tiles that incorporate the different properties of acoustic polyurethanes to optimise the functional performance.
Acoustic design parameters used by 'TRANS' the Tod software tool for predicting the acoustic performance of multi layer composites.
- Operational water depth range
- Operational frequency range
- Operational temperature
- Density and weight restrictions
- Coating thickness limitations
- Buoyancy and displacement consideration
Polyurethane systems exhibit optimum performance at depths up to 350 metres, unaffected by the environment over long time periods.
|
