彩色声图可显示三维图象，即时间、频率及强度关系图。
The color sonagram shows image in three dimensions of time, frequency and intensity.
方法：以喉声图仪采集、分析146例正常老年人嗓音声样。
Method :To collect and analyze 146 voice samples of the normal aged with sonogram.
介绍了一种近场高精度被动定位方法——聚焦波束形成声图定位。
A passive ranging method, using focused beam-forming, has a good precision in near field.
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