The current study explores whether perception of coarticulatory vowel nasalization differs by speaker age (adult vs. child) and type of voice (naturally produced vs. synthetic speech). Listeners completed a 4IAX discrimination task between pairs containing acoustically identical (both nasal or oral) vowels and acoustically distinct (one oral, one nasal) vowels. Vowels occurred in either the same consonant contexts or different contexts across pairs. Listeners completed the experiment with either naturally produced speech or text-to-speech (TTS). For same-context trials, listeners were better at discriminating between oral and nasal vowels for child speech in the synthetic voices but adult speech in the natural voices. Meanwhile, in different-context trials, listeners were less able to discriminate, indicating more perceptual compensation for synthetic voices. There was no difference in different-context discrimination across talker ages, indicating that listeners did not compensate differently if the speaker was a child or adult. Findings are relevant for models of compensation, computer personification theories, and speaker-indexical perception accounts.