You have good possibility of getting a PwD certificate provided you must have 40% and above disability in order to be eligible for the certificate. But to avail reservation you have to be 100% disability criteria.

As per the GOI notifications, the benefits corresponding to the percentage of hearing disability is stated below:

• MODERATE ( 40% AND ABOVE): Hearing aid at free of cost or concessional rates.
• Severe (75% AND ABOVE): * Hearing aid at free of cost or concessional rates * Job reservation * Benefit of special employment exchange * Scholarships * Single language formula
• Profound (100%): * Hearing aids * Facilities of reservation * special employment exchange * Special facilities in Schools like Scholarships, hearing aids * Exemption from 3 language formula.

I hope this helps. All the very best for your future endeavors!