1、INCH-POUND MIL-DTL-32015A(AS) 5 May 2004 SUPERSEDING MIL-DTL-32015 15 October 1999 DETAIL SPECIFICATION MICROPHONES, LINEAR, GENERAL SPECIFICATION FOR This specification is approved for use by the Naval Air Systems Command, and is available for use by all Departments and Agencies of the Department o
2、f Defense. 1. SCOPE 1.1 Scope. This specification covers direct currant (dc) powered, high-gain, linear noise-cancelling microphones for boom and mask mounting applications. 1.2 Part or identifying number (PIN). PINs to be used for linear microphones acquired to this specification are created as fol
3、lows: M 32015 /X Y Type of microphone on a specific specification sheet. Specification sheet number. Specification sheet number. M prefix Comments, suggestions, or questions on this document should be addressed to: Commander, Naval Air Warfare Center Aircraft Division, Code 414100B120-3, Highway 547
4、, Lakehurst, NJ, 08733-5100 or emailed to Tom.Omaranavy.mil. Since contact information can change you may want to verify the currency of this address information using the ASSIST Online database at www.dodssp.daps.mil. AMSC N/A FSC 5965 Provided by IHSNot for ResaleNo reproduction or networking perm
5、itted without license from IHS-,-,-MIL-DTL-32015A (AS) 2 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in section 3 and 4 of this specification. This section does not include documents cited in other sections of this specification recommended for additional
6、information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements of documents cited in sections 3 and 4 of this specification, whether or not they are listed. 2.2 Government documents. 2.
7、2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. DEPARTMENT OF DEFENSE SPECIFICA
8、TIONS MIL-DTL-55668 - Cord, Electrical; Audio, Subminiature (Retractile and Straight) MIL-DTL-32015/1 - Microphones, Linear, 28v, Boom TYPE M-177/AIC MIL-DTL-32015/2 - Microphones, Linear, MBU-12-20P And, Oxygen Mask M-176/AIC And MBU-23/P MIL-DTL-32015/4 - Microphones, Linear, 10v, Oxygen Mask MIL-
9、DTL-32015/5 - Microphones, Linear, 10v, Chemical, Biological, and Radiological (CBR) MIL-DTL-32086 - Intercom, Portable DEPARTMENT OF DEFENSE STANDARDS MIL-STD-202 - Test Methods for Electronic and Electrical Component Parts MIL-STD-461 - Requirements for the Control of Electromagnetic Interference
10、Characteristics of Subsystems and Equipment MIL-STD-464 - Electromagnetic Environmental Effects Requirements for Systems MIL-STD-810 - Environmental Engineering Considerations and Laboratory Tests Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-D
11、TL-32015A (AS) 3 DEPARTMENT OF DEFENSE HANDBOOKS MIL-HDBK-217 - Reliability Prediction of Electronic Equipment MIL-HDBK-235/1 - Electromagnetic (Radiated) Environment Considerations for Design and Procurement of Electrical and Electronic Equipment, Subsystems, and Systems Part 1B MIL-HDBK-237 - Elec
12、tromagnetic Environmental Effects on Platforms, Systems, and Equipment (Copies of these documents are available on line at http:/assist.daps.dla.mil/quicksearch/ or www.dodssp.daps.mil or from the Standardization Document Order Desk, 700 Robins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.2.
13、2 Other Government documents. drawings, and publications. The following other Government documents, drawings, and publications form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. DRAWI
14、NGS ARMY SM-B-883830 - Microphone Boom (A copy of the above drawing is available from the Commander, US Army-CECOM. Attn: AMSEL-IM-T-CS-A, Fort Monmouth, NJ 07703-5018.) NAVAL AIR SYSTEMS COMMAND NAWCADLKE-MISC-414100-0006 - SK-N-864, Simulated Gun Blast Producing Equipment (A copy of the above draw
15、ing is available from the Commander, Naval Air Warfare Center Aircraft Division, Code 7.2, Highway 547, Lakehurst, NJ 08733-5090.) AIR FORCE 57B12662 - Connector, Plug, Electrical U-173/U 57B12664 - Tip-Electrical Plug Connector (Copies of the above drawings are available from Defense Supply Center
16、Columbus, DSCC-VTCD, P.O. Box 3990, Columbus, OH 43216-5000.) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32015A (AS) 4 PUBLICATIONS NAVAIR AD 1115 - Electromagnetic Compatibility Design Guide for Avionics and Related Ground Support Equip
17、ment (A copy of the above publication is available from the Commander, Naval Air Systems Command, Code AIR-7.2.5.3, Building 407, Naval Air Station, Patuxent River, MD 20670.) CRDC-SP-84010 - United States Joint Services Standardization Agreement for Fit Factor Testing of Military Masks and ERDEC te
18、sting protocol entitled “ERDEC Respirator Quantitative Fit Testing Program” (A copy of the above publication is available from the Commander, Naval Air Systems Command, Code AIR-4.6.3.1, Building 2187, Naval Air Station, Patuxent River, MD 20670.) NAVSEA TE-00-AB-GTP -010 Part Stress Derating (A cop
19、y of the above manual is available from Naval Inventory Control Point, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094, or email www.navicp.navy.mil) 2.3 Non-Government publications. The following documents form a part of this document to the extent specified herein. Unless otherwise sp
20、ecified, the issues of these documents are those cited in the solicitation or contract. AMERICAN NATIONAL STANDARDS INSTITUTE ANSI-S3.2 - Speech Over Communication Systems, Method of Measuring the Intelligibility of (A copy of this document is available from the American National Standards Institute
21、, 25 West 43rd Street, 4th floor, New York, NY 10036, or email http:/www.ansi.org/) THE INSTITUTE FOR INTERCONNECTING AND PACKAGING ELECTRONIC CIRCUITS (IPC, INC.) J-STD-001 - Requirements for Soldered Electrical and Electronic Assemblies (A copy of this document is available from the Institute for
22、Interconnecting and Packaging Electronic Circuits, 2215 Sanders Road, Northbrook, IL 60062-6135, or email http:/www.ipc.org/) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32015A (AS) 5 2.4 Order of precedence. In the event of a conflict be
23、tween the text of this document and the references cited herein the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 Specification sheets. The individual item requi
24、rements shall be as specified herein and in accordance with the applicable specification sheet. In the event of any conflict between the requirements of this specification and the specification sheet, the latter shall govern. 3.2 First article. When specified (see 6.2), a sample shall be subjected t
25、o first article inspection in accordance with 4.3. 3.3 Component parts. The microphone shall be supplied with component parts as specified in the applicable specification sheet (see 3.1). 3.4 Weight. The weight of the microphone shall be as specified in the specification sheet. 3.5 Color. The exteri
26、or surface of the microphone assembly shall be as specified in the specification sheet. 3.6 Design. The design of the microphone shall meet the mechanical construction (see 3.7), electrical characteristics (see 3.8.1), and acoustical performance requirements (see 3.8.2) of this specification. 3.6.1
27、Aging. The microphone shall not contain parts fabricated from materials known to change their properties because of aging. 3.6.2 Materials. Materials shall be as specified herein. However, when a definite material is not specified, a material shall be used that shall enable the microphones to meet t
28、he performance requirements of this specification. Dissimilar metals shall not be used in direct contact unless specifically required. Metals shall be protected against the effects of electrolytic action. Acceptance or approval of any constituent material shall not be construed as a guarantee of the
29、 acceptance of the finished product. When specified in the specification sheet, materials shall be resistant, or suitably treated, to resist exposure to chemical and biological agents. 3.7 Construction. 3.7.1 Unacceptable material. Natural rubber or natural rubber cement shall not be used in the mic
30、rophone. Rubber substitutes and plastic materials shall not be used as edges and fillers. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32015A (AS) 6 3.7.2 Microphone material. The voltage-generating element shall be an electret condenser,
31、a piezoelectric ceramic, a polyvinylidene fluoride (PVF2), or an equivalent material giving demonstrated similar results. Microphone designs incorporating magnetic material shall not be used. 3.7.3 Microphone amplifier. The microphone shall be designed with an amplifier capable of accepting impresse
32、d power from the intercommunication systems. 3.7.4 Cement. To ensure uniform adhesion and strength characteristics, any cement used shall be properly and uniformly controlled and cured throughout production. 3.7.5 Microphone shield. To preclude the effects of electromagnetic interference or suscepti
33、bility, the microphone transducer and amplifier shall be shielded. 3.7.6 Microphone connector. The microphone connector shall be as specified in the applicable specification sheet. 3.7.7 Microphone positioning adjustment. The microphone positioning adjustment for microphones incorporating a swivel t
34、ype mounting mechanism shall provide a noncritical adjustment to obtain a torque of 30 to 50 inch-ounces. From an initial setting of 40 inch-ounces, the torque shall not change in excess of 20 percent after subjection to any or all of the environmental tests. The swivel shall be designed such that i
35、t may be adjusted over full range of swivel for at least one hundred times before it must be readjusted for specified torque. Total operating life of the swivel mechanism shall be at least ten thousand swivels over full range at specified torque. 3.7.8 Solderability. Soldering shall be in accordance
36、 with J-STD-001. 3.7.9. Deleted 3.8 Performance. 3.8.1 Electrical characteristics. 3.8.1.1 Input current. The DC input current shall be as specified in the applicable specification sheet. 3.8.1.2 Output impedance. The electrical output impedance of the microphone shall be as specified in the applica
37、ble specification sheet. 3.8.1.3 Insulation resistance. The insulation resistance between the conductors and case shall be not less than 10 megohms. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32015A (AS) 7 3.8.1.4 Dielectric withstanding
38、 voltage. The microphone shall withstand the application of a 115 volt nominal alternating potential of commercial line frequency without flashover or breakdown when tested as specified (see 4.5.2.4). 3.8.1.5 Voltage operating range. The voltage operating range shall be as specified in the applicabl
39、e specification sheet. 3.8.2 Acoustical. 3.8.2.1 Sensitivity. 3.8.2.1.l Sensitivity to a close sound source. The sensitivity to a close sound source shall be as specified in the applicable specification sheet. After being subjected to any or all environmental tests, sensitivity shall not vary by mor
40、e than ?3 dB from the initial reading. 3.8.2.1.2 Sensitivity at reduced bias voltage. At DC operating voltages below the normal range, the output of the microphone shall be as specified in the applicable specification sheet. 3.8.2.1.3 Sensitivity at altitude. The sensitivity of the microphone at a s
41、imulated altitude of 15,000 feet shall be as specified in the applicable specification sheet. 3.8.2.2 Frequency response. 3.8.2.2.1 Frequency response to a close sound source. The frequency response characteristic of the microphone assembly to a close sound source shall be as specified in the applic
42、able specification sheet. After subjection to any or all environmental tests, the frequency response shall not vary by more than ?3 dB from the initial readings. 3.8.2.2.2 Frequency response at altitude. The frequency response characteristics of the microphone at a simulated altitude of 25,000 feet
43、shall be as specified in the applicable specification sheet. 3.8.2.3 Intelligibility. The microphones shall be designed to enable the listeners to achieve a score of 90 percent or better when tested with one of the sets of speech materials specified in ANSI S3.2. 3.8.2.4 Noise-immunity characteristi
44、c. The noise-immunity characteristic of the microphone shall be as specified in the applicable specification sheet. 3.8.2.5 Linearity. The output of the microphone shall be a linear function of the sound pressure level (SPL) input to the microphone in the range 74 to 124 dB SPL or as specified in th
45、e applicable specification sheet. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32015A (AS) 8 3.8.2.6 Harmonic distortion. The harmonic distortion in the output of the microphone shall be no greater than 2 percent up to 114 dB SPL and no gr
46、eater than 5 percent from 114 to 124 dB SPL or as specified in the applicable specification sheet. 3.8.2.7 Gain stabilization time when specified. The gain stabilization time shall be as specified in the applicable specification sheet. 3.8.2.8 Over voltage protection. Unless otherwise specified the
47、microphone shall withstand overvoltage conditions as specified in the applicable specification sheet. Upon removal of the overvoltage condition the microphone shall resume normal operation when the voltage is returned to within standard operating limits. The microphone shall meet the sensitivity to
48、a close sound source within ? 3 dB from the initial reading. 3.8.3 Cord, cordage, cables, connectors, and pins. 3.8.3.1 Temperature range. The cable shall be flexible and resilient throughout the temperature range of -40 to +85 ?C and shall show no evidence of cracking or any other damage as a resul
49、t of exposure to the temperature range specified herein. 3.8.3.2 Flex life. The unterminated cable shall have a mean flex life of 25,000 flexes without showing evidence of the following: a. Damage to the outside jacket (splits, cracks) b. Damage to the insulation of the individual conductors c. Electrical discontinuity 3.8.3.3 Cord anchorage. Unless specified in the specification sheet, the cord and its anchorage in the t
