# Microphone.onActivity

#### Availability

Flash Player 6.

#### Usage

    activeMicrophone.onActivity = function(activity) {
    	// Your code here
    }

#### Parameters

`activity` A Boolean value set to `true` when the microphone starts detecting sound, `false` when it stops.

#### Returns

Nothing.

#### Description

Event handler; invoked when the microphone starts or stops detecting sound. If you want to respond to this event handler, you must create a function to process its `activity` value.

To specify the amount of sound required to invoke `Microphone.onActivity(true)`, and the amount of time that must elapse without sound before `Microphone.onActivity(false)` is invoked, use Microphone.setSilenceLevel().

#### Example

The following example displays `true` or `false` in the Output window when the microphone starts or stops detecting sound.

    m = Microphone.get();
    _root.attachAudio(m);
    m.onActivity = function(mode)
    {
    	trace(mode);
    };

#### See also

Microphone.onActivity`,` Microphone.setSilenceLevel()