eCFR Reference Browser

---

title: "21 CFR §874.3330"

source: "https://www.ecfr.gov/current/title-21/section-874.3330"

title_number: "21"

volume_number: "8"

chapter_number: "Unknown"

subchapter_code: "H"

subchapter_subject: "MEDICAL DEVICES"

part_code: "874"

part_subject: "EAR, NOSE, AND THROAT DEVICES"

subpart_code: "D"

subpart_subject: "Prosthetic Devices"

section_number: "874.3330"

section_subject: "Master hearing aid."

cfr_reference: "21 CFR 874.3330"

title_name: "Title 21"

title_subject: "Food and Drugs"

parts_covered: "Parts 800 to 1299"

revised_date: "Revised as of April 1, 2019"

publication_date: "As of April 1, 2019"

contains_description: "Containing a codification of documents of general applicability and future effect"

publication_info: "Published by the Office of the Federal Register National Archives and Records Administration as a Special Edition of the Federal Register"

---

(a)Identification. A master hearing aid is an electronic device intended to simulate a hearing aid during audiometric testing. It has adjustable acoustic output levels, such as those for gain, output, and frequency response. The device is used to select and adjust a person's wearable hearing aid.

(b)Classification. Class II.

§874.3330 - Master hearing aid.