This piece of equipment is used to carryout EVP (Electronic Voice Phenomena) experiments. So what is EVP? Well in real terms some people believe it is the dead speaking to us now the theory goes is that the sounds made are out of the hearing ranges for people and are more audible to dogs with the use of a Dictaphone which can pickup and record these very acute sounds. As group we tend to use Olympus Digital model as it has a USB port so the recordings can be transferred to a PC or laptop for analysis after an investigation.