User Guide

470 Chapter 2: ActionScript Language Reference
Microphone.silenceTimeOut
Availability
Flash Player 6.
Usage
active_mic.silenceTimeOut:Number
Description
Read-only property; a numeric value representing the number of milliseconds between the time
the microphone stops detecting sound and the time
Microphone.onActivity(false) is
invoked. The default value is 2000 (2 seconds).
To set this value, use Microphone.setSilenceLevel().
Example
The following example enables the user to control the amount of time between when the
microphone stops detecting sound and when
Microphone.onActivity(false) is invoked. The
user controls this value using a NumericStepper instance called
silenceTimeOut_nstep. The
ProgressBar instance called
silenceLevel_pb modifies its appearance depending on whether the
audio stream is considered silent. Otherwise, it displays the activity level of the audio stream.
var silenceLevel_pb:mx.controls.ProgressBar;
var silenceTimeOut_nstep:mx.controls.NumericStepper;
this.createEmptyMovieClip("sound_mc", this.getNextHighestDepth());
var active_mic:Microphone = Microphone.get();
sound_mc.attachAudio(active_mic);
silenceLevel_pb.label = "Activity level: %3";
silenceLevel_pb.mode = "manual";
silenceTimeOut_nstep.minimum = 0;
silenceTimeOut_nstep.maximum = 10;
silenceTimeOut_nstep.value = active_mic.silenceTimeOut/1000;
var nstepListener:Object = new Object();
nstepListener.change = function(evt:Object) {
active_mic.setSilenceLevel(active_mic.silenceLevel, evt.target.value*1000);
};
silenceTimeOut_nstep.addEventListener("change", nstepListener);
this.onEnterFrame = function() {
silenceLevel_pb.setProgress(active_mic.activityLevel, 100);
};
active_mic.onActivity = function(active:Boolean) {
if (active) {
silenceLevel_pb.indeterminate = false;
silenceLevel_pb.setStyle("themeColor", "haloGreen");
silenceLevel_pb.label = "Activity level: %3";
} else {
silenceLevel_pb.indeterminate = true;
silenceLevel_pb.setStyle("themeColor", "0xFF0000");