MIL-PRF-25670 Earphone Elements, General Specification ForThis specification covers the general requirements for earphone elements. These are products which have screw type terminals, and are used on communication headsets for applications requiring communication within high-noise conditions, at either ground-level or altitude. These parts meet established United States Air Force safety standards \(see 6.1\) for signal-generating equipment mounted in close-proximity to the human ear.

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MIL-PRF-25670B

SPECIFICATIONS

DEPARTMENT OF DEFENSE

MIL-F-14072 - Finishes for Ground Based Electronic Equipment.

FEDERAL

A-A-52024 - Compass, Magnetic: Surveyor's and Transit, Pocket; With Optional Ball and

Socket or Ball and Socket Head, and Jacob's Staff.

H-28

- Screw-thread Standards for Federal Services.

(Application for copies of Commercial Item Descriptions and Federal Standards should be addressed

to Federal Supply Service Bureau, Specifications Branch, 470 East L'Enfant Plaza, SW, Suite 8100,

Washington, D.C. 20407)

STANDARDS

DEPARTMENT OF DEFENSE

MIL-STD-202 - Electronic and Electrical Component Parts, Test Methods for.

MIL-STD-810 - Environmental Test Methods and Engineering Guidelines.

MIL-STD-1285 - Marking of Electrical and Electronic Parts.

(Unless otherwise indicated, copies of the above specifications, standards, and handbooks are

available from the Defense Printing Service Detachment Office, Building 4D, Customer Service, 700

Robbins Avenue, Philadelphia, PA 19111-5094.)

2.3 Non-Government publications. The following documents form a part of this document to the

extent specified herein. Unless otherwise specified, the issues of the documents which are DoD

adopted are those listed in the issue of the DoDISS cited in the solicitation. Unless otherwise

specified, the issues of documents not listed in the DoDISS are the issues of the documents cited in

the solicitation (see 6.2).

AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI)

ANSI S1.12-1967(R1986) - Laboratory Standard Microphones, Specifications for

ANSI S3.2

- Method for Measuring Intelligibility of Speech Over Communication

Systems

ANSI S3.7-1995

- Method for the Coupler Calibration of Earphones

(Application for copies should be addressed to the American National Standards Institute, Inc., 11

W. 42nd Street, New York, New York 10036.)

2.4 Order of Precedence. In the event of a conflict between the text of this document, and the

references cited herein (except for related associated specifications, specification sheets, or MS