Java判断音频分贝代码

A：以下是Java中用于判断音频分贝的代码：

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

public class AudioLevel {

    private static final int SAMPLE_RATE = 44100; // 采样率
    private static final double MAX_16_BIT = Short.MAX_VALUE; // 最大16位
    private static final int SAMPLE_SIZE_IN_BITS = 16; // 采样位数
    private static final int CHANNELS = 1; // 声道数
    private static final boolean SIGNED = true; // 是否有符号
    private static final boolean BIG_ENDIAN = true; // 大端表示

    public static void main(String[] args) throws LineUnavailableException, IOException {
        File file = new File("your_audio_file_path");
        AudioInputStream audioInputStream = AudioSystem.getAudioInputStream(file);
        AudioFormat audioFormat = getFormat();

        int bufferSize = (int) (audioFormat.getFrameSize() * SAMPLE_RATE);
        byte[] buffer = new byte[bufferSize];

        DataLine.Info info = new DataLine.Info(TargetDataLine.class, audioFormat);

        TargetDataLine line = (TargetDataLine) AudioSystem.getLine(info);
        line.open(audioFormat);
        line.start();

        System.out.println("Recording...");

        int bytesRead = 0;
        double rms = 0;

        while (bytesRead != -1) {
            bytesRead = line.read(buffer, 0, buffer.length);
            for (int i = 0; i < bytesRead; i += 2) {
                short sample = (short) ((buffer[i] & 0xFF) | (buffer[i + 1] << 8));
                double amplitude = sample / MAX_16_BIT;
                rms += amplitude * amplitude;
            }
        }

        line.stop();
        line.close();

        double rootMeanSquare = Math.sqrt(rms / (SAMPLE_RATE * CHANNELS));
        double decibel = 20 * Math.log10(rootMeanSquare);

        System.out.println("RMS: " + rootMeanSquare);
        System.out.println("dB: " + decibel);

    }

    private static AudioFormat getFormat() {
        return new AudioFormat(SAMPLE_RATE, SAMPLE_SIZE_IN_BITS, CHANNELS, SIGNED, BIG_ENDIAN);
    }
}

这个代码使用了Java内置的javax.sound.sampled包，通过读取音频文件的采样数据，计算出Root Mean Square（RMS，均方根）和分贝值（dB）。当然，在使用之前，你需要将上述代码中的"your_audio_file_path"替换为你想要分析的音频文件的路径。