我希望我的Android应用程序能识别声音。例如,我想知道来自麦克风的声音是拍手、敲门还是其他什么声音。
我需要使用数学,还是可以只使用一些库?
如果有任何用于声音分析的库,请告诉我。谢谢。
我需要使用数学,还是可以只使用一些库?
如果有任何用于声音分析的库,请告诉我。谢谢。
Musicg库对于哨声检测非常有用。但对于拍手声,我不建议使用它,因为它会对每个大声的声音(甚至是语音)做出反应。
对于拍手和其他打击乐声音的检测,我推荐使用TarsosDSP。它具有简单的API和丰富的功能(例如音高检测等)。对于拍手检测,您可以使用类似以下内容的代码(如果您使用TarsosDSPAndroid-v3):
MicrophoneAudioDispatcher mDispatcher = new MicrophoneAudioDispatcher((int) SAMPLE_RATE, BUFFER_SIZE, BUFFER_OVERLAP);
double threshold = 8;
double sensitivity = 20;
mPercussionDetector = new PercussionOnsetDetector(22050, 1024,
new OnsetHandler() {
@Override
public void handleOnset(double time, double salience) {
Log.d(TAG, "Clap detected!");
}
}, sensitivity, threshold);
mDispatcher.addAudioProcessor(mPercussionDetector);
new Thread(mDispatcher).start();
你可以通过调整灵敏度(0-100)和阈值(0-20)来调整探测器。
祝你好运!
public class Clapper
{
private static final String TAG = "Clapper";
private static final long DEFAULT_CLIP_TIME = 1000;
private long clipTime = DEFAULT_CLIP_TIME;
private AmplitudeClipListener clipListener;
private boolean continueRecording;
/**
* how much louder is required to hear a clap 10000, 18000, 25000 are good
* values
*/
private int amplitudeThreshold;
/**
* requires a little of noise by the user to trigger, background noise may
* trigger it
*/
public static final int AMPLITUDE_DIFF_LOW = 10000;
public static final int AMPLITUDE_DIFF_MED = 18000;
/**
* requires a lot of noise by the user to trigger. background noise isn't
* likely to be this loud
*/
public static final int AMPLITUDE_DIFF_HIGH = 25000;
private static final int DEFAULT_AMPLITUDE_DIFF = AMPLITUDE_DIFF_MED;
private MediaRecorder recorder;
private String tmpAudioFile;
public Clapper() throws IOException
{
this(DEFAULT_CLIP_TIME, "/tmp.3gp", DEFAULT_AMPLITUDE_DIFF, null, null);
}
public Clapper(long snipTime, String tmpAudioFile,
int amplitudeDifference, Context context, AmplitudeClipListener clipListener)
throws IOException
{
this.clipTime = snipTime;
this.clipListener = clipListener;
this.amplitudeThreshold = amplitudeDifference;
this.tmpAudioFile = tmpAudioFile;
}
public boolean recordClap()
{
Log.d(TAG, "record clap");
boolean clapDetected = false;
try
{
recorder = AudioUtil.prepareRecorder(tmpAudioFile);
}
catch (IOException io)
{
Log.d(TAG, "failed to prepare recorder ", io);
throw new RecordingFailedException("failed to create recorder", io);
}
recorder.start();
int startAmplitude = recorder.getMaxAmplitude();
Log.d(TAG, "starting amplitude: " + startAmplitude);
do
{
Log.d(TAG, "waiting while recording...");
waitSome();
int finishAmplitude = recorder.getMaxAmplitude();
if (clipListener != null)
{
clipListener.heard(finishAmplitude);
}
int ampDifference = finishAmplitude - startAmplitude;
if (ampDifference >= amplitudeThreshold)
{
Log.d(TAG, "heard a clap!");
clapDetected = true;
}
Log.d(TAG, "finishing amplitude: " + finishAmplitude + " diff: "
+ ampDifference);
} while (continueRecording || !clapDetected);
Log.d(TAG, "stopped recording");
done();
return clapDetected;
}
private void waitSome()
{
try
{
// wait a while
Thread.sleep(clipTime);
} catch (InterruptedException e)
{
Log.d(TAG, "interrupted");
}
}
/**
* need to call this when completely done with recording
*/
public void done()
{
Log.d(TAG, "stop recording");
if (recorder != null)
{
if (isRecording())
{
stopRecording();
}
//now stop the media player
recorder.stop();
recorder.release();
}
}
public boolean isRecording()
{
return continueRecording;
}
public void stopRecording()
{
continueRecording = false;
}
}
我知道这篇文章已经有一年了,但我偶然发现它。我非常确定通用的、开放领域的声音识别问题尚未解决。因此,在Android上找不到任何可以完成你想要的功能的库,因为这样的代码还不存在。如果你选择某个受限制的领域,你可以训练一个分类器来识别你感兴趣的声音类型,但这需要大量的数学计算和每种潜在声音的大量实例。如果你想要的库存在,那将会非常酷,但据我所知,这项技术还没有达到那个水平。