Why do I hear bass tones louder than others?

So we’ve moved into a new house, since moving in I’ve heard a low rumbling sound like a car idling in the distance. I started to notice it more and more – until now i hear it 24/7. We are on a hill overlooking the town below and there is a very busy port in the distance so I assumed it was something to do with this. Other people can hear it but I can hear it super loud, today it echoed all through my head and ears and was unbearable yet my flat mate could only just hear it – why is this? I’m so worried now that I have a tumour or something else going on – I did an audiologist test and it came back with a very small amount of high pitched hearing loss and I have tinnitus. My dr said I might have hyperacussis, but I can only hear it in the house, when I leave I hardly hear it….. anyone have any ideas? I’ve been calling neurologists and ENT’s to get an appointment – Dr said I didn’t need an MRI but I’d like one – it’s driving me nuts as i can feel the sound rather than hear it – anyone got any ideas?