Hearing loss7
1 Hearing loss
HearinglossHearingimpairmentHearingthreshold>25dBDeafness :severe hearing impairment inwhich any type of amplification is not useful2
2 Hearing loss ⚫ Hearing impairment, ⚫ Hearing threshold > 25 dB ⚫ Deafness : severe hearing impairment in which any type of amplification is not useful
Degree of hearing lossWHO,19910-25dBNormal hearing26-40dBMildhearing loss41-60dBModerate hearing loss61-80dBSevere hearing loss>80dBProfound hearing loss3
3 Degree of hearing loss WHO, 1991 Normal hearing 0 – 25dB Mild hearing loss 26-40dB Moderate hearing loss 41-60dB Severe hearing loss 61-80dB Profound hearing loss >80 dB
Types of Hearing lossOrganicMixedNon-organicConductiveOrg +PsychoPsychogenicSensorineural MalingeeringMixed
4 Types of Hearing loss | Organic Non-organic Mixed Conductive Psychogenic Org +Psycho Sensorineural Malingeering Mixed
Types of hearing lossExternal earMiddleearInnerearCochlearnerveSensori-neuraldeafnessConductivedeafnessMixeddeafnessFig.14-1:Types of deafness5
5 Types of hearing loss