The MediaTrackSettings dictionary's echoCancellation property is a Boolean value whose value indicates whether or not echo cancellation is enabled on an audio track. This lets you determine what value was selected to comply with your specified constraints for this property's value as described in the MediaTrackConstraints.echoCancellation property you provided when calling either getUserMedia() or MediaStreamTrack.applyConstraints().

Echo cancellation is a feature which attempts to prevent echo effects on a two-way audio connection by attempting to reduce or eliminate crosstalk between the user's output device and their input device. For example, it might apply a filter that negates the sound being produced on the speakers from being included in the input track generated from the microphone.

If needed, you can determine whether or not this constraint is supported by checking the value of MediaTrackSupportedConstraints.echoCancellation as returned by a call to MediaDevices.getSupportedConstraints(). However, typically this is unnecessary since browsers will simply ignore any constraints they're unfamiliar with.


var echoCancellation = MediaTrackSettings.echoCancellation;


A Boolean value which is true if the track has echo cancellation functionality enabled or false if echo cancellation is disabled.


See Example: Constraint exerciser in Capabilities, constraints, and settings for an example.


Specification Status Comment
Media Capture and Streams
The definition of 'echoCancellation' in that specification.
Candidate Recommendation Initial specification.

Browser compatibility

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ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidiOS SafariSamsung Internet
Basic supportChrome Full support YesEdge ? Firefox Full support 50IE ? Opera Full support YesSafari ? WebView Android ? Chrome Android Full support YesEdge Mobile ? Firefox Android Full support 50Opera Android Full support YesSafari iOS ? Samsung Internet Android ?


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See also

Document Tags and Contributors

Contributors to this page: fscholz, Sheppy
Last updated by: fscholz,