Anechoic coatings

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Anechoic Coatings

Anechoic tiles can be seen just past the bow on SSN-757 (USS Alexandria)

Anechoic coatings are exterior treatments to a submarines hull designed to reduce the ships acoustic signature. The coatings can be engineered to attenuate sonar returns and/or mask internal vibrations from machinery or equipment.

Contents

Materials

Coatings are typically made of viscoelastic materials, such as rubber or urethane polymers.

Construction

Coatings have generally been of tile-based construction, though spray-on coatings are now available.

History & Usage

Alberich tiles were a world war two German development, 4mm thick tiles of rubber designed to attenuate within the frequency range of allied ASDIC sets.

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