Is single sided deafness a disability?

The term disability applies to many people who suffer at the hands of discrimination. I have single sided deafness, but I don’t think I am considered by the government as having a disability. I feel this is really unfair, I am beginning to notice how vulnerable I can be, when it comes to employment, I am constantly worried about losing my hearing when working at jobs that require phone work, like call centre.

Do you know if there is any places on earth where a government recognizes a disability that includes SSD , how do you define disability?