— Concepts
Voice Agent
An AI system you can talk to — combines speech-to-text, an LLM, tool use, and text-to-speech.
Also known as: AI voice agent · Conversational AI
What is Voice Agent?
A voice agent is the conversational layer over an LLM agent: STT (Whisper, Deepgram) feeds an LLM (Claude, GPT-4o), which calls tools and returns text routed through TTS (ElevenLabs) back to the caller. Used in inbound support, sales-qualification calls, appointment booking, and 24/7 reception. ONROL's AI Architect track ships a working voice agent on day 4.
— Related
Terms connected to Voice Agent
Concepts
AI Agent
An AI system that decides its own next action and takes multi-step actions autonomously.
Open →Tools
Speech-to-Text
AI that transcribes spoken audio into written text — Whisper, AssemblyAI, Deepgram.
Open →Tools
Text-to-Speech
AI that turns text into natural-sounding spoken audio — ElevenLabs, OpenAI TTS, Sarvam.
Open →Tools
ElevenLabs
The leading AI voice / TTS platform — natural voices, voice cloning, multilingual support.
Open →Concepts
Function Calling
An LLM feature that lets the model invoke your code/APIs in a structured way.
Open →