Details

Autor(en) / Beteiligte

• Sanchis, L
• Cervera, F
• Sánchez-Dehesa, J
• Sánchez-Pérez, J V
• Rubio, C
• Martínez-Sala, R

Titel

Reflectance properties of two-dimensional sonic band-gap crystals

Ist Teil von

• The Journal of the Acoustical Society of America, 2001-06, Vol.109 (6), p.2598-2605

Ort / Verlag

United States

Erscheinungsjahr

2001

Quelle

美国小型学会期刊集（AIP Scitation平台）

Beschreibungen/Notizen

• An analysis of the reflectance of sonic band-gap crystals consisting of square arrays of rigid cylinders in air is presented. The standing wave formed in front of the structures is studied both experimentally and theoretically. Experiments have been performed with a mobile robotized microphone that obtains pressure maps on the plane perpendicular to the axes of the cylinders. Enhancements of the standing wave ratio (SWR) are observed in frequency regions where attenuation bands appear in zero-order transmission experiments. Also, the SWR presents oscillations that can be related to the finite dimension of the structure (Fabry-Perot effect). Both features are well described by calculations based on a double-scattering approach.