检测 Android 上的当前音量

发布于 2024-11-18 02:40:01 字数 926 浏览 5 评论 0原文

我正在构建一个始终从麦克风录制音频的应用程序，每当音频达到某个阈值时，我就会执行某个操作。

但是我应该如何计算阈值的适当体积？我有一个静态卷编码，它在某些设备上运行良好，但不适用于所有设备（在某些情况下它太敏感，反之亦然）。

我正在使用 AudioRecord，这是代码的一部分：

int bufferSize = AudioRecord.getMinBufferSize(Constants.RECORDING_FREQUENCY,Constants.channelConfiguration,Constants.audioEncoding);    
AudioRecord audioRecord = new AudioRecord( MediaRecorder.AudioSource.MIC,Constants.RECORDING_FREQUENCY,Constants.channelConfiguration,Constants.audioEncoding, bufferSize); 
short[] buffer = new short[bufferSize];
while(true) {
   int bufferReadResult = audioRecord.read(buffer, 0, bufferSize);
   for (int i = 0; i < bufferReadResult; i++) {
      currentVolume = java.lang.Math.abs(buffer[i]);
      if (currentVolume > Constants.NO_VOLUME_AMPLITUDE)
        // ALRIGHT ! This is what I'm looking for :D
   }
}

所以，我的问题是：如何计算 Constants.NO_VOLUME_AMPLITUDE 而不是对其进行硬编码？

预先非常感谢，泽

原文

I'm building an application that is always recording audio from the microphone, whenever the audio reaches a certain threshold I perform a certain action.

However how should I calc the appropriate volume for the threshold ? I've a static volume coded which works well across some devices but not all devices (in somes cases it is too sensitive or vice versa).

I'm using AudioRecord, here's part of the code:

int bufferSize = AudioRecord.getMinBufferSize(Constants.RECORDING_FREQUENCY,Constants.channelConfiguration,Constants.audioEncoding);    
AudioRecord audioRecord = new AudioRecord( MediaRecorder.AudioSource.MIC,Constants.RECORDING_FREQUENCY,Constants.channelConfiguration,Constants.audioEncoding, bufferSize); 
short[] buffer = new short[bufferSize];
while(true) {
   int bufferReadResult = audioRecord.read(buffer, 0, bufferSize);
   for (int i = 0; i < bufferReadResult; i++) {
      currentVolume = java.lang.Math.abs(buffer[i]);
      if (currentVolume > Constants.NO_VOLUME_AMPLITUDE)
        // ALRIGHT ! This is what I'm looking for :D
   }
}

So, my question is: how do I calculate Constants.NO_VOLUME_AMPLITUDE instead of having it hard coded ?

Thanks so much in advance,
Ze

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