Java音频录制噪音在完全安静的房间

Question

我正在尝试用java录音。而质量并不好。虽然在房间里完全相当，但仍有连续的噪音。有没有机会去除/过滤噪音？

我在廉价的Android手机和一些录音应用程序上发现了同样的问题。看起来这是录音的一般问题

package test;

import javax.sound.sampled.*;
import java.io.*;

public class Tmp {

    AudioFileFormat.Type fileType = AudioFileFormat.Type.WAVE;


    AudioFormat getAudioFormat() {
        float sampleRate = 44100;
        int sampleSizeInBits = 16;
        int channels = 1;
        boolean signed = true;
        boolean bigEndian = true;
        AudioFormat format = new AudioFormat(sampleRate, sampleSizeInBits,
                                             channels, signed, bigEndian);
        return format;
    }

    void start(String n) {
        TargetDataLine line;
        File f = new File(n);
        try {
            AudioFormat format = getAudioFormat();
            DataLine.Info info = new DataLine.Info(TargetDataLine.class, format);
            line = (TargetDataLine) AudioSystem.getLine(info);
            line.open(format);
            line.start();
            AudioInputStream ais = new AudioInputStream(line);
            AudioSystem.write(ais, fileType, f);

        } catch (LineUnavailableException | IOException ex) {
            System.out.println(ex);
        }
    }

}