/usr/src/linux-headers-3.13.0-144-lowlatency/sound is in linux-headers-3.13.0-144-lowlatency 3.13.0-144.193.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/src/linux-headers-3.13.0-144-lowlatency/../linux-headers-3.13.0-144/sound