Auditory apparatus for use in medical analysis, testing and treatment of deafness, ear picks for medical purposes, ear plugs for medical purposes, furniture especially made for medical purposes, namely, deafness testing booths, hearing aids for the deaf; electric, electronic, battery operated, cordless and rechargeable electroacoustical apparatus for the deaf

APPARATUS FOR EDUCATING DEAF PERSONS, DEAF MUTES AND THE SUBNORMAL IN SCHOOL IN HEARING AND SPEAKING, COMPRISING COMBINATIONS OF PHONOGRAPHS AND HEADSET; [ PHONOGRAPHS; PHONOGRAPHS WITH COORDINATED VISUAL DISPLAYS; ] SOUND AMPLIFIERS AND SOUND AMPLIFYING INSTALLATIONS; PARTS THEREFOR; AND ACCESSORIES THEREFOR-NAMELY, ELECTRIC CURRENT SUPPLY MEANS, EARPLUGS, EARPADS; SOUND AMPLIFYING INDUCTIVE DEVICES FOR APPLICATION TO TELEPHONES; AUDIOMETERS; SILENT CABINS; TEST INSTALLATIONS FOR DETERMINING...