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Voice AI & Technology

Voice AI Agent

A voice AI agent is a software agent that holds a spoken conversation with a person, listening to what they say, understanding it and answering aloud in order to reach a defined goal.

Definition

A voice AI agent is conversational AI applied to speech. It listens through speech-to-text, uses a language model to understand the request and decide what to say next, and answers aloud through text-to-speech. Unlike a classic phone menu, it does not ask people to press keys or pick from a list: they simply talk.

Agents differ by how much freedom they have. Some follow a strict script, others follow a structured plan of topics and adapt the questions to the answers received. What is measured is the quality of the conversation: speech recognition accuracy, response delay (long pauses break the rhythm), whether the goal was achieved, and how often the person asked for a human or gave up.

Voice lowers the barrier for people who dislike forms and lets them say more than they would type. The risks are real as well: misrecognised names or accents, an unnatural pace, and the temptation to let the agent decide things it should not. At Passisto, for example, the AI agent holds the conversation and produces a report, while people review it and make every decision.

Key points

  • It listens, understands and replies aloud, with no keypad menu.
  • It is built from speech-to-text, a language model and text-to-speech working together.
  • Response delay, recognition accuracy and goal completion are the main quality measures.
  • It should say clearly that it is an AI and give a way to reach a person.
  • It collects and structures information; decisions about people stay with humans.

Example

A retailer must screen 150 applicants for seasonal roles in ten days. Each applicant opens a link in their browser, talks to a voice agent for about ten minutes and answers the same role-specific questions. The recruiters read the reports instead of making 150 first calls.

Frequently asked questions

How is a voice AI agent different from an IVR phone menu?

An IVR forces callers through fixed options with keys or short commands. A voice AI agent understands free speech and can follow up on an answer, so the conversation feels closer to a real exchange.

Do people need to install anything?

That depends on the product. Some work over a phone line, others run in a web browser through a secure link, which avoids any installation.

Can a voice AI agent make decisions?

It can collect and summarise information, and score answers against criteria you define. Hiring, evaluation or support decisions should be taken by a person who reads the result.

Related terms

Conversational AIConversational AI is software that lets people interact with a computer through natural spoken or written dialogue, understanding what they mean and replying in a way that fits the conversation.Speech-to-TextSpeech-to-text, also called automatic speech recognition, is the technology that converts spoken audio into written text so that software and people can search, analyse and act on what was said.Text-to-SpeechText-to-speech is the technology that turns written text into spoken audio, using a synthetic voice, so that software can read content or answer people aloud.Human in the LoopHuman in the loop is a way of designing AI systems so that a person reviews, corrects or approves the AI's output before it leads to a decision or an action that affects someone.

AI conversations, human decisions

Passisto holds structured voice conversations with candidates, employees, clients and students, and turns them into reports your team can act on.

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What is Voice AI Agent? Definition and examples | Passisto