A New Alternative Method for the Generation of Acoustic Filters, Modulating Acoustic Impedance: Theoretical Model

• 作者: a a-Saldañ Agustín Enciso-Muñ David Armando Contreras-Solorio Jesús Madrigal-Melchor oz Raúl Alberto Reyes-Villagrana Xochitl Saldañ
• 来源期刊: 声学期刊(英文)
• 学科: 医学
• 关键词: ACOUSTIC Transmission ACOUSTIC IMPEDANCE MODULATION GAUSSIAN PROFILE
• 年，卷（期）: 2017,（3）
• 页码范围: 39-51
• 页数: 13页
• 分类号: R73

摘要

Using the transfer matrix method we calculate the frequency dependence of the transmission of longitudinal elastic waves for a layered structure where the specific acoustic impedance of the layers with odd numbering follows a Gaussian distribution, while the inserted even layers have the same impedance as the propagation medium. The structure presents intervals of low-pass, band-stop, and band-pass. The characteristics of the bands depend on the number of layers, on the contrast between the maximum and minimum impedances of the structure, and on the ratio of the width of the inserted layers to the width of the layers with a Gaussian distribution of impedances.