I believe what you are describing is a sensitivity to emfs (electromagnetic fields). Some people are more sensitive to them than others. Electronics put off a lot of frequency which is bothersome to some people. My husband doesn't understand why I tell him it feels like the t.v. is screaming at me because I hate the frequency it puts off. This could be a help or a hindrance to ghost hunting. On the one hand, being more sensitive to emfs can help you detect the presence of spirit. On the other hand, there is the school of thought that bombardment of emfs on sensitive people causes hallucinations. I think since you have a recorder, you will be able to separate the two.
They have crystal pendants you can wear to neutralize the emfs of electronics. I think it might make you feel more at ease.
Happy ghost hunting, love and light to you!!
~*Ashley*~