Accession Number:

AD0254069

Title:

SPEECH ANALYSIS TECHNIQUES

Descriptive Note:

Corporate Author:

ROYAL INST OF TECH STOCKHOLM (SWEDEN)

Personal Author(s):

Report Date:

1960-12-31

Pagination or Media Count:

1.0

Abstract:

The main principle of operation has been tested in a 6-channel analyzer instrumentation that has been compiled from existing parts. This analyzer - RASSIAN - also serves the purpose of useful speech spectrum sectioning device for our current work. It is faster in operation and more accurate than the Sona-Graph but much slower than the ultimate 51-channel design. Comparative studies of various means of formant frequency me surements The comparative studies of errors in Sona-Graph measurements have continued. Formant frequency measurements may be taken with almost the same accuracy in spectrograms as in sections. Evaluation of various means of voice pitch extraction A 3-channel system of independent frequency counters connected to separate band-pass filters in the F0-range and associated logic for picking the lowest frequency has been constructed. A system for voice fundamental frequency emphasis based on inverse-filtering has been constructed. Automatic recognition of specific phonetic features A pilot study of identification of nasal sounds on the basis of first formant bandwidth has not given very promising results. The general theory of distinctive sound features with application to Swedish phonemes has been reviewed. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE