Below is an EVP recording that at normal speed had a high pithched sound . I slowed it down four times and couild hear the words;"I'm pissed off".

The recording bleow that was made holding a phone over the EVP tablet to amplify the sound with out altering the origional recording.

 

 

Origional recording of the words " I'm pissed off".

 

Recording the EVP tablet to amplify the sound.