/usr/lib/speech_tools/lib/libestbase.so is in libestools-dev 1:2.4~release-1build1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/speech_tools/lib/../../x86_64-linux-gnu/libestbase.so
/usr/lib/speech_tools/lib/../../x86_64-linux-gnu/libestbase.so