Phononic glass: a robust acoustic-absorption material.
In order to achieve strong wide band acoustic absorption under high hydrostatic pressure, an interpenetrating network structure is introduced into the locally resonant phononic crystal to fabricate a type of phononic composite material called "phononic glass." Underwater acoustic absorption coefficient measurements show that the material owns high underwater sound absorption coefficients over 0.9 in 12-30 kHz. Moreover, the quasi-static compressive behavior shows that the phononic glass has a compressive strength over 5 MPa which is crucial for underwater applications.
Key Laboratory of Microgravity Science, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China.
Heng
H
Jiang
Yuren
Y
Wang
D000042:Absorption; D000162:Acoustics / Q000295:instrumentation*; D000535:Aluminum; D019245:Compressive Strength; D055119:Elastic Modulus; D004867:Equipment Design; D006874:Hydrostatic Pressure; D008962:Models, Theoretical; D009622:Noise / Q000517:prevention & control*; D011140:Polyurethanes; D013016:Sound; D014867:Water
D011140:Polyurethanes; D014867:Water; D000535:Aluminum