Acoustic-phonetic analysis of loud and Lombard speech in simulated cockpit conditions

Author

Stanton, Bill J. ; Jamieson, Leah H. ; Allen, George D.

Author_Institution

Dept. of Electr. Eng., US Air Force Acad., CO, USA

fYear

1988

fDate

11-14 Apr 1988

Firstpage

331

Abstract

Acoustic-phonetic differences between normal and abnormal speech in reference to recognition systems for the aircraft cockpit are studied. The speech used in this research was collected in an anechoic chamber with an oxygen mask, and the speaker spoke (1) normally, (2) loudly (~10 dB above normal), and (3) with 90 dB of pink noise injected into the ears (invoking the Lombard reflex). Eighteen features were analyzed for approximately 11000 phonemes (from five speakers) to determine significant differences in the three types of speech. The most reliable trends observed were energy migrations in the frequency domain and the associated changes in spectral tilt for the sonorants

Keywords

aircraft instrumentation; military systems; simulation; speech analysis and processing; speech recognition; Lombard reflex; Lombard speech; abnormal speech; acoustic-phonetic analysis; aircraft cockpit; anechoic chamber; energy migrations; frequency domain; normal speech; pink noise; simulated cockpit conditions; sonorants; spectral tilt; speech recognition; 1f noise; Aircraft; Analytical models; Anechoic chambers; Ear; Loudspeakers; Speech analysis; Speech coding; Speech enhancement; Speech recognition;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 1988. ICASSP-88., 1988 International Conference on

Conference_Location

New York, NY

ISSN

1520-6149

Type

conf

DOI

10.1109/ICASSP.1988.196583

Filename

196583