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The Speech Input node captures the caller’s spoken words using automatic speech recognition (ASR) and stores the transcript and confidence score.

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Behavior

  • Listens for the caller’s speech using the configured ASR model
  • Returns a transcript with a confidence score
  • If confidence is below the threshold, emits SPEECH.NO_MATCH
  • Supports grammar constraints and recognition hints for improved accuracy
  • Falls back to DTMF input if enabled

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Configuration

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Recognition

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Timing & retries

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Output & fallback

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ASR models

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Output handles

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Output variables

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Use cases

Set hints to common first names and confidenceThreshold: 0.6 for flexible name recognition. Store the result in {{customer_name}}.
Set grammar to "yes no" and model: "phone_call" for reliable binary responses over phone lines.
Use model: "medical" with hints for medication names and symptoms. Set silenceTimeout: 5 to give patients time to think.