<prompt> Hearing loss of 65dB, what is the grade of deafness-MildModerateSevereModerately severe  <response>: Ans. is d i.e., Moderately severe o WHO recommended the following classification on the basis of pure tone audiogram.Hearing threshold in better ear average of 500,1000,2000HzDegree of impairment WHO classificationAbility to understand speech0-25Not significantNo significant difficulty with faint speech2640MildDifficulty with faint speech.41-55ModerateFrequent difficulty with normal speech.56-70Moderately severeFrequent difficulty even with loud speech71-91SevereCan understand only shouted or amplified speechAbove 91ProfoundUsually cannot understand even amplified speech 