Implementation of an active headset by using the H-infinity robust control theory

Abstract

This paper presents a methodology for implementing an active headset by using H-infinity robust control theory. The adopted structure is feedback tracking control. Performance, stability, and robustness of the closed-loop system have been taken into account in the design procedure by using a general framework of the H-infinity theory. The resultant controller is realized on the basis of operational amplifier circuitry. Experiments are conducted to test the developed headset. The result shows that the headset achieves broadband attenuation up to approximately 15 dB in the band 200-800 Hz. The design considerations indicated in the experimental result are also addressed. (C) 1997 Acoustical Society of America. [S0001-4966(97)05709-3] PACS numbers: 43.50.Ki, 43.38.Si [GAD].