That would depend on what you consider scientifically sound.
The fields of parapsychology and paranormal studies are gaining acceptance, though many "real" scientists don't believe them.
You may consider checking out The American Paranormal Society, featured on the SyFy show "Ghost Hunters". They are out of Rhode Island and are serious about their work and examine all cases with a cynical eye. They may be able to give you direction or names more qualified to direct your query to.
