Accession Number:

AD0627320

Title:

EVALUATION OF SPEECH PROCESSING DEVICES. 1. INTELLIGIBILITY, QUALITY, SPEAKER RECOGNIZABILITY

Descriptive Note:

Final rept. 1 Jun 1964-31 Jul 1965

Corporate Author:

SPERRY RAND RESEARCH CENTER SUDBURY MA

Report Date:

1965-07-31

Pagination or Media Count:

166.0

Abstract:

Three bases of evaluation are dealt with intelligibility, speaker recognizability and aesthetic acceptability or quality. A two-choice diagnostic rhyme test for the transmission of consonant information has been developed. It yields a total intelligibility score plus diagnostic scores relating to the fidelity with which seven binary attributes of consonant phonemes are transmitted to the ear of the listener. These attributes are voicing, nasality, duration and frication as opposed to plosion i.e., front as opposed to middle middle as opposed to back and back as opposed to front. For treating the problem of speaker recognizability, procedures have been developed by means of which listeners ratings of voices on various perceived acoustic traits can be analyzed to predict speaker recognizability under any given transmission condition. The problem of evaluating the aesthetic acceptability or quality of transmitted speech is treated by means of the standard unit- variance method. Primary emphasis is placed upon the contributions of the channel to the quality of the received speech. However, the method is adaptable for purposes of studying qualitative variation attributable to the source i.e., the speaker.

Subject Categories:

  • Acoustics
  • Voice Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE