1、AMSC N/A FSC 5965 PERFORMANCE SPECIFICATION SHEET HEADSET-MICROPHONE, HEARING PROTECTIVE TYPE MODERATE AMBIENT NOISE LEVELS, UP TO 105 dB, ENLARGED EARCUP, INFLIGHT AIRCREW HEADSET-MICROPHONE, M87819/5-01 This specification is approved for use by all Departments and Agencies of the Department of Def
2、ense. The requirements for acquiring the product described herein shall consist of this specification sheet and MIL-PRF-87819. FIGURE 1. Headset-microphone assembly, M87819/5-01. MIL-PRF-87819/5A 30 September 2009 SUPERSEDING MIL-PRF-87819/5(USAF) 30 January 1997 INCH-POUND Provided by IHSNot for Re
3、saleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-87819/5A 2 Letter Inches mm Design dimension Tolerances Design dimension Tolerances A 1.50 + 0.50 0.00 38.1 + 12.7 0.0 B 6.0 2.0 152.4 50.8 C 16.0 Retracted 4.0 406.4 101.6 D 60.0 Extended Minimum 1,524.0 Minimum NOTES:
4、 1. Length “A” of cord between Part or Identifying Number (PIN) U-179A/U connector and its entry into earcup, for interface to oxygen mask. 2. Cord “C/D” shall include length “B” of straight portion of cord between its termination and the beginning of the coiled portion. 3. Cord “C/D” shall have the
5、 retracted and extended lengths shown, for movement around the console. 4. Dimensions are in inches. Unless otherwise specified, tolerance is 0.015 inch. Metric equivalents are given for information only. FIGURE 1. Headset-microphone assembly, M87819/5-01 Continued. EARCUP EARCUP CUSHION Letter Dime
6、nsion Description Inches mm A 3.250 .010 82.6 width, earcup B 4.500 Max 114.3 height, earcup C 2.200 Max 55.9 depth, earcup (outwards, from head) D 0.500 Max 12.7 depth, earcup cushion (uncompressed) E 0.625 Min 15.9 width, earcup cushion F 1.625 Min 41.3 width, earcup cushion ear-opening G 2.680 Mi
7、n 68.1 height, earcup cushion ear-opening NOTES: 1. The maximum dimensions of the earcup cushion shall not exceed the outer dimensions of the earcup. 2. Dimensions are in inches. Unless otherwise specified, tolerance is 0.015 inch. Metric equivalents are given for information only. FIGURE 2. Earcup
8、envelope and earcup cushion dimensions. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-87819/5A 3 FIGURE 3. Wiring diagram. REQUIREMENTS: Design and construction: Dimensions and configuration: See figures 1 and 2. Color: The color shall be a
9、s specified in MIL-PRF-87819. Headband pressure: Headband pressure shall be sufficient to allow the part to meet the attenuation requirements of MIL-PRF-87819 and this specification sheet, not to exceed 2.4 lb. Headband parts: The headband shall include those components necessary to allow the part t
10、o meet the performance requirements of MIL-PRF-87819 and this specification sheet. The components shall be shielded in a manner minimizing the possibility of entangling the users hair. Headband and yoke dimensions: The headband and yoke dimensions shall allow the headset to meet the performance requ
11、irements of MIL-PRF-87819 and this specification sheet, including Shock (drop) and Attenuation. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-87819/5A 4 Headband adjustment: The “Headband minimum adjustment” (see MIL-PRF-87819, figure title
12、d: “Anthropometric headband adjustment requirements”) shall apply, as follows: “Headband minimum adjustment range with headband pad removed. With dimension A set at 5.58 inches (141.7 mm) (5.33 + 1/2 earcup cushion depth), dimension B shall be adjustable to 4.81 inches (122.2 mm) (4.56 + typical hea
13、dband cushion depth) minimum. With dimension A set at 6.75 inches (171.5 mm) (6.50 + 1/2 earcup cushion depth), dimension B shall be adjustable to 6.19 (157.2 mm) (5.69 + 1/2 typical headband cushion depth) maximum.” These dimensions accommodate the 5th percentile female head breadth and head height
14、, respectively, through the 95th percentile male aviator head breadth and head height, respectively, as specified in MIL-STD-1472. The “Earcup yoke angular deflection” (see MIL-PRF-87819, figure titled: “Anthropometric headband adjustment requirements”) shall apply, as follows: “Angular deflection C
15、 5 degrees with respect to axis E, maximum.” Microphone assembly: Microphone shall be PIN M-87/AIC, as specified in MIL-PRF-26542/2 (1 required), or an equivalent noise-canceling, lightweight, altitude-capable microphone as approved by the qualifying activity. The boom shall be as specified in Air F
16、orce drawing 67B1854, or other boom providing equivalent adjustability (fine and coarse), and adherence to the Reparability and Shock (drop) requirements of MIL-PRF-87819, as approved by the qualifying activity. Wiring Diagram: See figure 3. Connectors: Connectors shall be PIN U-179A/U and PIN U-174
17、/U as specified in MIL-DTL-9177/2 and PIN U-173/U as specified in Air Force drawing 57B12662, or electrically and mechanically compatible part as approved by the qualifying activity. See figure 1. Earcup: The earcup dimensions shall be as specified on figure 2. Earcup Finish: The finish shall be smo
18、oth, without appreciable texture, to accommodate rapid cleaning. Earcup cushion: The earcup cushions dimensions shall be as specified on figure 2. The earcup cushion shall be clearly marked with the manufacturers cage code and part number, located on the underside surface. Earphone element: The earp
19、hone element shall be either PIN H-143/AIC as specified in MIL-PRF-25670/2 (2 required), or an equivalent lightweight, altitude-capable transducer meeting hearing-protective standards, as approved by the qualifying activity. Volume control: The volume control shall PIN RV6NAYSA1O1A, as specified in
20、MIL-PRF-94/3, or equivalent as approved by the qualifying activity. Dimensions of the knob shall not exceed 0.438 inch (12.3 mm) in height and 0.813 inch (20.7 mm) in diameter. The volume control and knob shall not bind, stick, or restrict the movement of the microphone boom assembly, earcup or yoke
21、. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-87819/5A 5 Weight: 1.45 lb. maximum, when weighed without cord and connectors. PIN: M87819/5-01. Performance characteristics: See table I, table II, and MIL-PRF-87819. Attenuation: Testing for
22、 attenuation shall be as specified in MIL-PRF-87819, with the exception that table I specified herein shall be used for attenuation values. TABLE I. Attenuation values. Freq.(Hz) 63 80 100 125 160 200 250 315 400 500 630 800 Minimum attenuation (dB) mean minus 2 X standard deviation 3 3 4 5 7 9 12 1
23、4 16 18 19 20 Minimum attenuation (dB) mean minus 2 X standard deviation with eyeglasses 1/1 1 2 3 4 6 8 11 13 15 16 17 Freq.(Hz) 1,000 1,250 1,600 2,000 2,500 3,150 4,000 5,000 6,300 8,000 Minimum attenuation (dB) mean minus 2 X standard deviation 21 21 22 22 22 22 22 21 21 20 Minimum attenuation (
24、dB) mean minus 2 X standard deviation with eyeglasses 1/19 20 21 22 22 22 21 20 19 14 1/ Eyeglasses shall be PIN HGU-4/P, as specified in MIL-PRF-87819. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-87819/5A 6 TABLE II. Performance characte
25、ristics. Inspection1/Qualification Group A Group B Group C Subgroup 1 Visual and mechanical Acoustic quality Attenuation Speech intelligibility Headset system Sensitivity X X X X X X X X X X Subgroup 2 Headband pressure Headband flexing Twist and pull Shock (drop) Fungus Vibration Temperature X X X
26、X X X X X X X X X X X Subgroup 3 Temperature shock Humidity Salt fog X X X X X X Subgroup 4 Cable isolation X X 1/ See MIL-PRF-87819, for inspection details. Intended use. Headset-microphone PIN M87819/5-01 is a moderate ambient noise level headset-microphone, providing communication within the nois
27、e conditions encountered in-flight in transport aircraft, as well as limited maintenance activities outside certain fighter and transport aircraft. For a listing of the aircraft and noise environments, for which this headset provides acceptable protection, refer to the U. S. Air Force (Air Force Res
28、earch Laboratory (AFRL) 711th HPW/RHCB (Battlespace Acoustics) Wright-Patterson AFB OH 45433). Its enlarged earcushion opening alleviates certain pain (e.g., ear tip hot-spots) associated with extended wear (in excess of 5 hours). This headset should only be used in conjunction with quick-don oxygen
29、 mask harness PIN 358-1506V-1 or equal; see Technical Order (T.O.) 15X5-4-10-1, and not with its smaller predecessor. This is a field-reparable part, the repair of which is described in T.O. 12R2-2AIC-222CL-1 (copies of this document are available from the Air Force Custodian). Changes from previous
30、 issue. The margins of this specification sheet are marked with vertical lines to indicate where changes from the previous issue were made. This was done as a convenience only and the Government assumes no liability whatsoever for any inaccuracies in these notations. Bidders and contractors are caut
31、ioned to evaluate the requirements of this document based on the entire content irrespective of the marginal notations and relationship to the last previous issue. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-87819/5A 7 Referenced document
32、s. In addition to MIL-PRF-87819, this document references the following: MIL-DTL-9177/2 MIL-PRF-25670/2 MIL-PRF-26542/2 MIL-PRF-94/3 MIL-STD-1472 67B1854 57B12662 CONCLUDING MATERIAL Custodians: Preparing activity: Air Force - 85 DLA - CC DLA-CC (Project 5965-2009-007) NOTE: The activities listed ab
33、ove were interested in this document as of the date of this document. Since organizations and responsibilities can change, you should verify the currency of the information above using the ASSIST Online database at http:/assist.daps.dla.mil. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
