Abstract
We report a strong attenuation of sound waves in a phononic band gap crystal of steel rods arranged in air. We investigate the attenuation level reached in the gaps for finite thickness samples. We show that a bypassing of sound waves by the sides of the sample are responsible for the observed saturation of the attenuation level in the gaps. Beyond this effect, we demonstrate the improvement of the acoustic insulation performance brought about by the periodicity of the crystal in comparison with the so-called mass law.
Original language | English |
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Pages (from-to) | 281-283 |
Number of pages | 3 |
Journal | Applied Physics Letters |
Volume | 83 |
Issue number | 2 |
DOIs | |
Publication status | Published - 2003 |