Spirit Box

PSB-11 Spirit Box

A spirit box is a device that scans quickly across the radio frequencies, either forwards or backwards. In the case of the PSB-11, scanning can be performed forwards and backwards simultaneously, on both an FM and AM frequency. Spirits are said to be able to manipulate the white noise in order to communicate though it in words and sentences.

A spirit box can be used to communicate using the white noise. Investigators ask questions and listen for intelligent responses to the questions asked, rather than snippets that can be radio stations. 

Swearing, specific answers and the same voice consistently coming through are said to be more reliably paranormal, as this is less likely to occur.