Adaptive Noise Reduction in Aircraft Communication Systems
Abstract
In many military environments, such as fighter jet cockpits, the increasing use of digital communication systems has created a need for robust vocoders and speech recognition systems. However, the high level of ambient noise in such environments makes vocoders less intelligible and makes reliable speech recognition more difficult. One method of enhancing the noise-corrupted speech is adaptive noise cancellation. In previous research, this method was tested in a simulated cockpit environment, yielding impressive results. However, in new simulations, reflecting more realistic conditions, adaptive noise cancellation has been less successful. Spectral analysis of the data shows that the spectral concentration of the ambient noise, along with the microphone characteristics, has a significant effect on the performance of adaptive noise cancellation.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 20, 1987
- Accession Number
- ADA178267
Entities
People
- Jeffrey J. Rodrı́guez
Organizations
- Massachusetts Institute of Technology