Acoustic impedance control system using a compact impact drive actuator

We propose an acoustic impedance control system integrated with tuning actuators based on the concept of functional acoustic boundary. Most of conventional acoustic structures can provide only fixed characteristics because their structural parameters are fixed as they were constructed. We have studied an acoustic impedance control system with tunable structural parameters. For example, so called micromachine technology may allow us to supply compact acoustic structure. This paper presents a compact impact drive actuator for tuning structural parameters. The compact impact drive actuator is designed so as to be integrated into an acoustic structure. Characteristics of a proposed system were investigated theoretically and experimentally.