THE INTELLIGIBILITY OF TWICE DETERIORATED SPEECH,
Abstract
Four aspects of distorted and controlled speech signals were tested with respect to the intelligibility of the signals: signal level, signal-to-noise ratio, the absence of acoustically weak segments, and periodic interruptions. Each distortion was represented in six degrees. From a mean intelligibility score of each condition, values of intelligibility were predicted for doubly distorted speech under assumptions that the distortions were non-overlapping and that a pair of distortions should produce the joint effect of the two singly. Thus, the predictions were made by multiplying the values associated with individual distortions. The results were in keeping with the assumption that the intelligibility of an imperfect communication system can be estimated if the relative effects of individual deterrents to intelligibility in the system are known. Although the assumption of joint probability is tenable as a first approximation, the error is more frequently in the direction of an over-estimation of the intelligibility of the signal rather than an under-estimation. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1964
- Accession Number
- AD0607847
Entities
People
- John W. Black
- Joseph G. Agnello
Organizations
- Ohio State University