SpeechRecognition: soundstart event

The soundstart event of the Web Speech API is fired when any sound — recognizable speech or not — has been detected.

Syntax

Use the event name in methods like addEventListener(), or set an event handler property.

addEventListener("soundstart", (event) => {});

onsoundstart = (event) => {};

Event type

A generic Event with no added properties.

Examples

You can use the soundstart event in an addEventListener method:

const recognition = new webkitSpeechRecognition() || new SpeechRecognition();

recognition.addEventListener("soundstart", () => {
  console.log("Some sound is being received");
});

Or use the onsoundstart event handler property:

recognition.onsoundstart = () => {
  console.log("Some sound is being received");
};

Specifications

Specification
Web Speech API # eventdef-speechrecognition-soundstart
Web Speech API # dom-speechrecognition-onsoundstart

Browser compatibility

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	WebView Android	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet
`soundstart_event`	33	79	No	No	20	14.1	4.4.3	33	No	20	14.5	2.0

Docs

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