A STUDY OF ACOUSTICAL MULTIPATH SYSTEMS. SECTION IV. DELAY LINE.
Abstract
The investigation of the effects of multiple paths on acoustical signals as related to speech recognition and improvement of signal-to-noise ratios is based on the theory that any multipath system may be considered to introduce redundancies in a basic message. These redundancies in the basic message may be used to select a particular message source from among many by the application of an 'attention function' characteristic of the spatial relationships between the source and the receiving mechanism. The attention function provides a model in which the distributed energy of the original pulse which reached the receiving mechanism along paths of different lengths (delayed in time) may be reconcentrated in time to a single pulse with an energy greater than that of the initially received pulse, and thus produce a significant increase n in the subjective signal to noise ratio. Subsequent subjective testing was designed to determine the effects of various headphones and signal to noise ratios on speech intelligibility. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1966
- Accession Number
- AD0637878
Entities
People
- D. W. Batteau
- G. Patrick Flanagan
Organizations
- Tufts University