Glossary
What is Speech-to-text (STT)?
Speech-to-text (STT), also called automatic speech recognition (ASR), is the technology that converts spoken audio into written text in real time. It is the first step in any AI phone call: the system must transcribe what the caller says before it can understand it.
By Alex Le, Echo product teamUpdated July 2026
Accuracy matters most with medical terms, medication names, accents, and background noise. Strong STT is what separates an AI call that flows naturally from one that constantly mishears the patient.
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