Glossary
What is Text-to-speech (TTS)?
Text-to-speech (TTS) is the technology that converts written text into spoken audio. In AI calling, TTS gives the voice agent its voice, turning the system's generated response into natural, human-sounding speech the caller hears.
By Alex Le, Echo product teamUpdated July 2026
Modern TTS produces realistic intonation, pacing, and warmth, which is essential in healthcare, where patients are often anxious and a robotic voice erodes trust.
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