SpeechRecognition: audiostart event

This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The audiostart event of the Web Speech API is fired when the user agent has started to capture audio for speech recognition.

Bubbles No
Cancelable No
Interface Event
Event handler onaudiostart

Examples

You can use the audiostart event in an addEventListener method:

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

recognition.addEventListener('audiostart', function() { 
  console.log('Audio capturing started');
});

Or use the onaudiostart event handler property:

recognition.onaudiostart = function() { 
  console.log('Audio capturing started'); 
}

Specifications

Specification Status Comment
Web Speech API
The definition of 'speech recognition events' in that specification.
Draft  

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
audiostart/code> event
Experimental
Chrome Full support 33Edge No support NoFirefox No support NoIE No support NoOpera No support NoSafari No support NoWebView Android Full support YesChrome Android Full support YesEdge Mobile No support NoFirefox Android No support NoOpera Android No support NoSafari iOS No support NoSamsung Internet Android ?

Legend

Full support  
Full support
No support  
No support
Compatibility unknown  
Compatibility unknown
Experimental. Expect behavior to change in the future.
Experimental. Expect behavior to change in the future.

See also

Document Tags and Contributors

Contributors to this page: mdnwebdocs-bot, fscholz, chrisdavidmills
Last updated by: mdnwebdocs-bot,