Hearing electronic device `` Electronics U-2M1 '' (U-2M4).
Acoustic systems, passive or active, as well as electro-acoustic units, hearing aids, electric megaphones, intercoms ...Hearing AidsThe electronic hearing aid "Electronics U-2M1" or U-2M4 has been produced since 1990. The device is designed to compensate for mild to moderate hearing loss. Acoustic amplification of the "Electronics U-2M1" apparatus - 50 dB, "Electronics U-2M4" - 40 dB. The output sound pressure level is 90 and 86 dB. The range of working sound frequencies is 300 ... 3000 Hz. Supply voltage 1.2 V. Duration of continuous work about 20 hours.
