Audio related to the current digital watermarking technologies related to the characteristics of digital audio watermark, the watermark extraction, detection, Algorithm and evaluation done exposition, and the prospects for future research. 对当前音频数字水印涉及到的相关技术,音频数字水印的特点,水印的提取、检测,算法和评价做了论述,并对未来的研究方向作出展望。