Abstract
Both theoretical and experimental results on ultrasound transmission through perforated plates with two periodic arrays of subwavelength holes are presented. Multiple transmission peaks and dips can be achieved by a single perforated plate. The locations of the transmission peaks and dips can be tunned independently by the periodicities of the individual hole arrays. The locations of the transmission peaks and dips produced by the doble periodicity device results from the sum of the transmission peaks and dips of the individual hole arrays. Prospective applications of this structure can be anticipated, such as in ultrasonic filters and ultrasonic medical instrumentation
