TIMIT

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Revision as of 15:31, 4 November 2008

Information about TIMIT

Here are some stop releases in TIMIT that illustrate unusual behavior.

Format: sentence -- time -- apparent articulatory events

• Transient and Frication
  • Multiple Bursts
    • fsdc0/sx52 - 2010 - four bursts.
    • mwem0/sx240 - 2757 - five bursts.
  • Gradual Fricated Releases
    • ...too numerous to mention...
    • mmdb0/sx87 - 327 - gradual frication onset, with a strong peak 15ms after frication onset.
  • Pre-Frication, then a Transient
    • mesj0/si997 -- 2978 -- /b/ae/
    • fsdc0/si2234 -- 869 -- strident frication.
    • fpmy0/si1153 -- 3334. ftaj0/sx69 -- 1877.
    • mrld0/sx424 -- 2032. mrws1/si1130 -- 1542.
    • mrxb0/sx55 -- 1713 -- early burst, frication, second burst.

• Voice Source
  • • mkrd0/si1903 -- 1580 -- tongue release changes the voicing waveform (impulsive closure) 4ms before the "burst."
    • fjsa0/si749 -- 4996 -- voice offset before closure, frication burst at closure.

==Diplophonia mrwa0/sx253 -- /g/er/. mdlm0/si1234 --/b/ax/.

==Filled Pauses mmds0/sx83 -- /d/ released into a high-pitched "squeak" pause (with /ah/ quality of following vowel). fpjf0/si1259 -- 2321 -- /p/ released into a high-pitched boundary marker. mmea0/si758 -- 2202 -- "filled pause" (one glottal pulse) inserted in the middle of frication for a /k/.

=="Drop Shut" Voice Onset mjwt0/sx31 -- 319. mkrg0/sx31 -- 276. fmpg0/sx342 -- 3633. mmag0/si496 -- 277 -- clearly a glottal pulse, but sounds like a /g/ burst. mjdm0/sx350 -- 3879.

==Other voicing or pulses during aspiration mpab0/sx318 -- 1012 -- /p/ih/ -- glottis closes and opens, then vibrates slowly for 17ms until the next closure. freh0/sx55 -- 1573 -- voicing, about 15ms. mfrm0/sx435 -- 2418 -- strong glottal closure, with F1 ringing, 14ms before next closure. mgjc0/sx435 -- /t/eh/ -- strong peak, looks like a second burst, but sounds like aspiration. fsjg0/sx40 -- 432 -- big peaks 15ms after burst, sound like aspiration.

==Place Effects mjrb1/sx300 -- 4198 -- /k/ in /s/k/uw/ implemented as a strident velar fricative. mdks0/si1696 -- /th/w/ -- auditory illusion, sounds like /p/uh/ unless the whole syllable is played. mrab0/sx54 -- /p/, then rounded fricated /y/, then /y/.

==Double Articulation mwew0/si1361 -- 0.15 -- /b/ax/ -- implemented as a labialized glottal stop. mrgm0/si1162 -- 1363 -- /b/ux/ -- doubly articulated labial/dental. mslb0/sx203 -- 1344 -- doubly articulated labial/alveolar, bursts 9.3ms apart.

==Reduction of /t/ mrso0/si1206 -- 1185 -- /t/ in "stood" becomes /th/; sounds like /k/ if you play it alone, but sounds like /th/ if you add the /s/ or the /uh/. mjrb1/sx300 -- 2196 -- second /t/ in "constantly" implemented as a lateral velar release.

==Reduction of /d/ flag0/si2094 -- 936 -- to /dh/ after /l/. mnls0/si1610 -- 1360 -- to /dh/ after glottalized /l/. mjrh1/sx64 -- 1632 -- ejective release followed by vowel onset reduced to /dh/. ftrb0/sx291 -- /er/d/ah/ ejective release reduced to /dh/. fpmy0/sx73 -- 666 -- to /dh/ because of a lisp. mljh0/sx64 -- 1988 -- after /l/, reduced to /n/ with click at release. fsrh0/sx221 -- /d/ax/ implemented as a syllabic /z/. mjmm0/sx85 -- 1128 -- word-final /d/ implemented with full closure, but with no pressure buildup. mdrd0/sx392 -- 2295 -- word-final /d/ released silently, next syllable starts with glottal stop.

==Non-Stop Things maeo0/sx336 -- 1770 -- syllabic /f/. fpas0/si2204 -- This sentence sounds like it was made with as little VT closure as possible.