An Audio Display of Processed Acoustic Signals.
Abstract
An audio display system using eight tones to encode the output of a digital signal processor is investigated. The purpose of the system is to detect and display an audio tone masked by bandlimited Gaussian noise. The digital processor performs a spectral analysis on the signal using a Fast Fourier Transform. Several hundred experiments were performed using a human listener to monitor the display. The experimental system is capable of displaying the difference between signal, no signal, and signal plus noise conditions. About 80% probability of correct decision by the human observer was achieved for input signals below the detection threshold for an unaided listener. Possible applications to a sonar system are indicated. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1974
- Accession Number
- AD0783867
Entities
People
- George Liell Mager Jr
Organizations
- Naval Postgraduate School