ADAPTIVE ACTIVE NOISE CONTROL FOR HEADPHONES USING THE TMS320C30 DSP

Prolonged exposure to excessive levels of acoustic noise can cause permanent hearing loss, safety problems, and lower work productivity. An adaptive controller that optimally cancels unwanted acoustic noise while allowing the desired sounds, such as speech and warning signals, would be particularly useful for people using heavy machinery or working near engines. This document describes the design of an adaptive control algorithm, which uses the TMS320C30 32-bit floating-point digital signal processor (DSP) and drives a Sony CD550 headphone/microphone system. Test data and results of the system are analyzed within this document. This document is a 1995 TI DSP Solutions Challenge entry.

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