Tufted Tit-Tyrant is very vocal (Fjeldså and Krabbe 1990). Contact calls are trills and chatters, with several variations (Smith 1971), such as "a rising, short (0.5 s) trill, prrrriiiIIIP, with accent at end" (Jaramillo 2003) and "a high, rapid, descending, ringing trill, sometimes ending with a sharp chip: teerrrrrrr'it!" (Lane, in Schulenberg et al. 2010). Chatters and trills have several functions, including as contact calls between members of a pair, or in territorial fights and chases (Smith 1971).
The dawn song is described as "a brief chuh-lik" (Smith 1971), "a repeated CHWip CHWip CHWip CHWip ..." (Jaramillo 2003), or as "a rising, sneezy wee'whizt? or t'weee-weet?" (Lane, in Schulenberg et al. 2010). This song, also described as a short rising and falling pluit, often repeated (Fjeldså and Krabbe 1990), can be heard throughout the day (Smith 1971).