Medical apparatus and instruments for measuring and recording the performance of hearing aids while in use by patients

'aid':13 'apparatus':2 'hear':12 'instrument':4 'measur':6 'medic':1 'patient':18 'perform':10 'record':8 'use':16

Apparatus and instruments for measuring and recording the performance of hearing aids; measurement equipment containing a controlled sound source and an electronic measuring and display device, for measuring and recording the performance of hearing aids

'aid':12,35 'apparatus':1 'contain':15 'control':17 'devic':26 'display':25 'electron':22 'equip':14 'hear':11,34 'instrument':3 'measur':5,13,23,28 'perform':9,32 'record':7,30 'sound':18 'sourc':19

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