TBW650

A high-performance composite material designed for transducer backings operating under elevated hydrostatic pressures at 200 kHz and above.

Description

TBW650, from Precision Acoustics Ltd, is two-phase material acoustic composite with high-density, rubbery inclusions embedded within a syntactic foam matrix. It has been designed specifically for use as a low frequency transducer backing to minimise backing reflections, whilst being able to withstand elevated hydrostatic pressures.

TBW650 makes an ideal material for use as a transducer backing material in underwater acoustic transducers. Backing reflections are very effectively suppressed in only a few millimetres of material. For example, 10 mm of TBW650 introduces 60 dB of absorption at 300 kHz.

Physical Specification

  • Excellent insertion loss and absorption
  • Acoustic de-coupling and isolation
  • Ability to withstand elevated hydrostatic pressures
  • No toxic constituents
  • Long term stability of acoustical and mechanical properties

Typical Properties

Appearance Blue with black chips
Dimensions of standard tile 305 mm x 240 mm x 26.5 mm
Shore D hardness (Matrix) 70 ± 3
Shore A hardness (Filler) 86 ± 3
Density 2917 ± 30 kg / m3
Average wave speed (200 – 700 kHz) 1151 ± 30 m / s
Acoustic impedance 3.08 MRayls
Hydrostatic crush strength 65 MPa / 9427 psi
Equivalent ocean failure depth 6630 meters / 21,751 feet
Operating temperature of cured material 100 °C (long-term)
125°C (short-term)

Contact Us

If you would like more information about this product please get in touch by phone, email or enquiry form.

Telephone:
+44 (0) 1305 264669

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