# What is Automatic Speech Recognition?

*Artificial Intelligence · Last updated: September 29, 2026*

> ASR

A system that analyzes spoken sound waves and converts them into written text.

## Overview

Automatic speech recognition is the technology that detects human voice and turns it into letters and words. It breaks down sound waves into digital frequencies and generates meaningful text with the help of artificial intelligence models. You frequently encounter it in daily life in phone voice searches or dictation tools.

***Analogy:** It is like a very fast secretary that writes down every spoken word into a notebook.*

## How it works

Audio signals coming from the microphone are first converted into digital data. Then, artificial intelligence models match these sound patterns with the closest word probabilities and print them on the screen as text.

## Where it is used

It is used in voice assistants on smartphones, customer service audio recording analytics, and video subtitling tools.

## Commonly confused with

It is the process of converting speech to text, which is the exact opposite of text-to-speech technology that converts text to speech.

## Questions and answers

**Can it work in noisy environments?**

Yes, thanks to advanced filtering algorithms, it can suppress background noises and isolate speech.

## Related terms

- [Speech-to-Text](https://trescout.com/en/dictionary/speech-to-text/)
- [STT](https://trescout.com/en/dictionary/speech-to-text/)
- [Whisper](https://trescout.com/en/dictionary/whisper/)
- [Transcription](https://trescout.com/en/dictionary/transcription/)

This explanation was written in plain language for TreScout with AI and **machine-translated** from the Turkish original · the Turkish version prevails. If something looks wrong or missing, write to [hello@trescout.com](mailto:hello@trescout.com). [Read in Turkish →](https://trescout.com/dictionary/automatic-speech-recognition/)

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Source: TreScout Dictionary · https://trescout.com/en/dictionary/automatic-speech-recognition/