Treatment varies from medical intervention of wax removal, pharmaceutical treatment, and/or surgery. Your ear needs to preserve a certain pressure to function but diving will alter this pressure, which can cause damage to the ear. Though, the world is noisy enough, people should avoid voluntary exposure to noise.
Hearing center testing can help diagnose this issue. This changes the perception of normal volume and eventually one might not even be able to hear softer sounds. A hearing test is a must to find the actual cause of the ringhush and the extent, if any, of the ringhush. The human body has a programming code called genetics, DNA or what have you and this will affect whether a person has this loss or not. There are drugs that are known to be ototoxic, meaning they have the potential to damage the auditory system and cause ringhush.
Some drugs can have a negative affect on the nerves needed for hearing. As higher frequency hearing is lost, "s" or "th" sounds often become difficult to differentiate, and women's voices (registering higher) become harder to understand. It is important that you lean on one another and work through potential problems together instead of letting them fester and adversely affect you all. You are considered to be hard of hearing if you experience from serious and powerful decrease in listening to.
https://walkinghealth.org/ringhush-review/
https://www.youtube.com/watch?v=yvGIEobsLvE