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CFR - Code of Federal Regulations Title 21

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[Code of Federal Regulations]
[Title 21, Volume 8]
[Revised as of April 1, 2009]
[CITE: 21CFR874.3310]
 See Related Information on 874.3310 in CDRH databases



TITLE 21--FOOD AND DRUGS
CHAPTER I--FOOD AND DRUG ADMINISTRATION
DEPARTMENT OF HEALTH AND HUMAN SERVICES
SUBCHAPTER H--MEDICAL DEVICES

PART 874 -- EAR, NOSE, AND THROAT DEVICES

Subpart D--Prosthetic Devices

Sec. 874.3310 Hearing aid calibrator and analysis system.

(a)Identification. A hearing aid calibrator and analysis system is an electronic reference device intended to calibrate and assess the electroacoustic frequency and sound intensity characteristics emanating from a hearing aid, master hearing aid, group hearing aid or group auditory trainer. The device consists of an acoustic complex of known cavity volume, a sound level meter, a microphone, oscillators, frequency counters, microphone amplifiers, a distoration analyzer, a chart recorder, and a hearing aid test box.

(b)Classification. Class II.

 
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