The speech-perception abilities of 15 prelingual deaf children, using the Nucleus 21-channel cochlear implant, were examined with a new audiovisual speech-feature test for young children. The test stimuli include the letters "b, d, c, p, t, v, z" and pictures of "me," "knee," and "key." Preliminary test retest data suggest good reliability for a 60-item test. Performance is significantly correlated with a closed-set picture test for young children. A feature analysis indicated that the voicing and envelope features were understood moderately well when presented by audition, and the place feature was understood well when presented by vision. [Work supported by NIH.] 4:45 7PPI4. Speech and hearing applications of LabVIEW ©. B. Espinoza-Varas, Chongjoon Shim, and Theodore H. Venema (Dept. Commun. Disord., Univ. Oklahoma Health Sci. Ctr., Oklahoma City, OK 73190) A system for research, teaching, and clinical applications in speech and heating is described. The system utilizes LabVIEW © software, National Instruments © expansion boards (D/A converter, DIO and DMA boards), and a Macintosh © IIFX computer. LabVIEW is an integratedpackage for data acquisition, digital signal processing, instrument and process control, data analysis and graphics. The package: (a) employs an icon-based language that does not require writing of code; (b) contains a comprehensive library of modular, pre-programed functions (e.g., A/D conversion, digital filtering, FFT analysis, etc.) callable by displaying icons to the screen; (c) links modules with a graphical "wiring" utility; and (d) is intuitively simple to use. The system is being used for signal generation, control of psychoacoustic and speechperception experiments, data analysis, and signal processing. A package of heating-science laboratory demonstrations has been implemented also.
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