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Catalog → L`union des Republiques Sovietiques Socialistes (l`URSS) → Les repertoires → La radiobibliotheque massive
 | Title: M. M. Efrussi. Hearing aids and audiometers | | Release 901 | | List: 15 | | Byte: 2420266 | | Note: MASS Release of 901 M RADIO LIBRARY. M. Efrussi. Hearing aids and ENERGY audiometers Moscow 1975 Efrussi M. M. Hearing aids and audiometers. M, "Energy", 1975. 96 pages about silt. (Mass radio library. Vyp. 901). In the book audiometers - electro-acoustic devices for measurement of auditory acuity and research of acoustical function - and hearing aids - the tiny Sound intensifying devices intended for persons with the lowered hearing are described. Schemes, electric and acoustic data of hearing aids are provided. Microphones and phones of air and bone provodimost are described. The main data on check of hearing aids and an assessment of their efficiency are provided. The book is designed for the mass reader, and also can be useful to the experts working in the field of an audiology and acoustical prosthetics. Mikhail Mikhaylovich Efrussi HEARING AIDS AND AUDIOMETERS | Download from site:
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