Gary Galka, from Connecticut in the US, appeared on the TV show Ghost Adventures to demonstrate how the device can record the voice of a spirit.
Gary Galka claims to have constructed several devices with which he can communicate with ghosts.
Galka lost his daughter in a car accident eight years ago and has since built over 30 devices designed to communicate with spirits including one that he believes has recorded his daughter's ghost saying "hi daddy, I love you." In addition to selling his inventions on his website Galka has also featured on an episode of the TV series Ghost Adventures on which he demonstrated one of his devices recording a voice during a paranormal investigation. "No one was making products for these people," he said.
Source Herald Sun