Sometime the sinuses are so bad that they actually cause misalignment of the jaw and teeth. Do you have pain when eating sometimes or hear clicking of the jaw bone? A sinus is meant to be a hollow cavity, when sinusitis occurs it fills the cavities with mucus and secretions which causes inflammation and can affect all of the area in your head, ears, teeth, even throat. That is why the specialty for this is called ENT > EAR NOSE and Throat Dr, the correct name for this is otolaryngologist.
The problem you are having would depend on how severe your sinuses were and for how long? Other things could have contributed to this also like loud environments or did you work in any areas that had noise pollution? Maybe too there was fluid in your ears for quite sometime that you never noticed and failed to treat. I am talking like for years to have an effect. Ask you doctor if these are call factors and the % of these conditions causing this.