in 1st one I possibly hear something around 50s... but it's very quiet... around 1.12-1.15 I don't actually hear a whistle.... It sounds to me more like someone is whispering...
In 2nd one i believe it's just, like you said, electrical interference... although between 34-36 I'm little bit confused... was here EVP caught over one of ur team member's voice? or this voice actually is evp?