AudioRecorder读取是否有等待状态？(Does AudioRecorder read ever has a wait state?)

 伙计们， 
 
 我正在通过设备的麦克风读取音频。 这是在后台线程中运行的伪代码： 
 
while(true) {
   if (stopRecordingRequested()) {
       break;
   }
   int bytesRead = recorder.read(in, inSize);
   // do the processing
}
 
 我注意到即使房间里有静音，方法“读取”也会返回数据。 
 
 我正在考虑一个紧凑的循环，例如上面的那个可能只是固定CPU，即使房间是沉默的。 
 
 是否可以配置录音机，使read（）等到有噪音？ 
 
 或者，也许有一种不同于CPU的不同技术。 
 
 预先感谢您的帮助。 

Folks,
 
I am reading audio off the devices's microphone. Here is the pseudo code that is being run in a background thread:
 
while(true) {
   if (stopRecordingRequested()) {
       break;
   }
   int bytesRead = recorder.read(in, inSize);
   // do the processing
}
 
What I noticed is that method "read" returns data even if there is silence in the room. 
 
I am thinking a tight loop such as the one above may simply peg the CPU even when the room is silent.
 
Is it possible to configure the audio recorder such that read() just waits until there is some noise?
 
Or, perhaps there is a different technique that doesn't peg the CPU.
 
Thank you in advance for your help.

原文：https://stackoverflow.com/questions/19437917