Practical adaptive noise reduction in the aircraft cockpit environment

This paper presents some preliminary results from adaptive noise cancellation experiments performed in a fighter aircraft cockpit simulator. The sound field and noise levels used in the experiment were very much more realistic than those used in previously reported experiments and the adaptive noise cancellation was performed in real time, using man mountable, Texas Instruments TMS 380 based hardware. The results confirm earlier assertions and indicate that generally, software and "off line" simulations have yielded optimistic results.