The present invention is a biometric recognition method and system for identifying
humans and animals with acoustic scanning techniques. The invention is based upon
transmitting acoustic energy through an external accessible surface to non-visible
internal tissue having a unique distinguishing characteristic. A master representative
pattern of the unique distinguishing characteristic is produced by the interaction
of an acoustic energy beam with discontinuities and inhomogeneities within the
non-visible internal tissue. The master representative pattern is used for reference
and compared to a current representative pattern formed upon each attempted reentry
into the system.
