Acoustic Modeling and Control of Conical Enclosures

摘要: Acoustic modeling and control of conical enclosures with an actuator boundary condition is presented. impedances are coupled electrical mechanical dynamics to generate a state-space model the system. Analysis acoustic impedance illustrates that pole-zero cancellation occurs when length conic section becomes large compared distance from apex condition. Used as platform for design, positive position feedback applied attenuation. The predicts first four resonance frequencies within 1.75 percent experimentally measured values. Standing waveforms presented related effects A controller implemented on experimental testbed global reductions 38.4 or 4.2 dB observed over 50-400 Hz frequency range. Experimental results demonstrate sound attenuation possible single channel.