Prosodic annotation is not obligatory for the SPEECHDAT corpora.
Lengthening of sounds may be indicated by a colon:
Ex.: show me the f:lights to Boston
Silent pauses may be marked with a full stop surrounded by spaces (`` . ''). This indicates a significant silence, i.e. one that is clearly noticeable by listening, and which is significantly longer than a silence associated with a stop consonant closure for the rate of speech used by the speaker.
Example: show me the . flights to Boston