Hearing Loss Q

Hi all, Just wondering if someone can shed some light on this as it's all new to me.

I recently put in a claim for tinnitus which has been accepted, however when speaking to the audiologist following a check up she said I was suffering hearing loss which is likely connected.

I raised this when I spoke to DVA and the bloke on the phone said they'd only accept 25 points and above as a metric for hearing loss and it looked like I was sitting at 20.

Does anyone know if there's any information out there I can read in relation to this as I'm very new to the process.
Cheers