Title :
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
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;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1988. ICASSP-88., 1988 International Conference on
Conference_Location :
New York, NY
DOI :
10.1109/ICASSP.1988.196583
