It recognizes and translates spoken language into text. It is also known as automatic speech recognition (ASR), computer speech recognition, or speech to text (STT).
You can take dependency of SpeechRecognition web block from SpeechRecognition module,
It'll show a MIC icon in your screen where you use web block.
It has 2 MIC icons one with Mute sign and another with Unmute, once you Unmute it then it'll start listen your voice and after end it'll trigger an event Success with Transcript, you can get Transcript in event handler action.
Important - You must allow access of your device microphone,