1、. I INCH POUND I MIL-M-49199/3(AS) 31 May 1994 MILITARY SPECIFICATION SHEET MICROPHONES, LINEAR M49199/3 This specification sheet is approved for use by the Naval Air Systems Cmnd, Department of the Navy, and is available for use by all Department and Agencies of the Department of Defense. The requi
2、rements for acquiring the product described herein shall consist of this specification sheet and the issue of the following specification listed in that issue of the Department of Defense Index of Specifications and Standards (DOOISS) specified in the solicitation: MIL-M-49199 60 Note Tolerances are
3、: Two place +I- .O2 Three place +I- .O05 Ir- 2.2Max -1 2.1 Max 81 .230 DIA /:cyk HIGH SHIELD 1 P 3 1 SM- 8-883830 BOOM, MICROPHONE 2 1 DL 06 O01 613 CORD ASSY, MICROPHONE (SEE PAGE 2) 1 1 M49 199/3 - * MICROPHONE ELEMENT Find QtY Part No. or Nomenclature or No. Reqd Identifying No. Description FIGUR
4、E 1. Boom microphone assembly. P/N M49199/3-*. AMSC N/A 1 of 7 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. FSC 5965 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-flIL-M-49199/3 999990b 1978871 790 MIL-M-49199/3
5、(AS) REQUIREMENTS: DESIGN and CONSTRUCTION: See Figure 1. MICROPHONE ASSEMBLY (Microphone element, boom assembly and cable) M49199/3-1: Cable assembly length is 13 inches. M49199/3-2: Cable assembly length is 16 inches. WEIGHT: COLOR: Semigloss, lusterless, black. JACKET MATERIAL: Cable jacket mater
6、ial chal 1 be vulcanized rubber. SOLDERABILITY: Soldering shall be in accordance with MIL-STO-2000. VOLTAGE OPERATING RANGE: 629 max for the assembly. 12 - 30 volts OC, 27.5 VDC nominal. INPUT CURRENT: 17 ml max. at 27.5 VDC when connected as shown in Figure 2. IMPEDANCE: The electrical impedance of
7、 the microphone assembly shall be such that the unit shall be capable of meeting the sensitivity and frequency response to a close sound source while connected to a 100 ohm fl% load impedance. SENSITIVITY: 96.4 mV minmum at 104 dB SPL with 27.5 VDC supply voltage, and shall not vary by more than 1.0
8、 dB when the supply voltage is varied between 22 to 30 volts. SENSITIVITY AT REDUCED BIAS VOLTAGE: Shall not vary by more than 12dB at 104 d SPL from the 27.5 VDC established value when the supply voltage is varied between 12 and 22 volts. SENSITIVITY AT ALTITUDE: f3dB of sensitivity at ground level
9、 while at a simulated altitude of 15,000 ft above sea level. FREQUENCY RESPONSE AT GROUND LEVEL: FREQUENCY RESPONSE AT ALTITUDE: Within f5dB of ground level measurement NOISE IMMUNITY: See Figure 4. LINEARITY: Resistive load shall be 100 Il% ohms. See Figure 3. GAIN STABILIZATION: Within 100 mS when
10、 supply voltage is between 23 and 30 VDC. Within 150 mS when supply voltage is between 12 and 22 VDC. ENVIROMENTAL STRESS SCREENING (ESS): 24 hours of temperature cycling between -54y and 55“c, with each cycle consisting of 1 hour at each temperature and the change between temperature occuring at a
11、minimum rate of 5% per minute. OVERVOLTAGE PROTECTION: 15 minutes operation in test circuit shown in Figure 2 while the 330 ohm resistor is shorted. THERMAL SHOCK: N/A. EXPLOSIVE ATMOSPHERE: N/A MARK1 NG: M49199/3-* MANUFACTURERS NAME OR CAGE CODE CONTRACT NUMBER DATE CODE SERIAL NUMBER 2 Provided b
12、y IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-M-49L99/3 9999906 1978872 627 I N 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-a U S a cn c O a cn a CE a, ia a, CE .- I- C, - O T- Lo O O T- I Lo I O O
13、O O T O O O 7 O O T- Y o u- LL 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-6) O P v) ni 4 Fr: O 4 O O d I O ol I 5 O O O O 4 O O O 4 O O od d- I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-i
14、 5 O O N U h - * n c al +I Y V T1 al L al .c c. w V a 7 2 w TT m m m c L. w a U u a 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-IN1 ENDED USE: Microphone, identified as 1 inear, M49199/3-*, is a noise-cancel ing, OC-powered, high-gain microphon
15、e designed for boom mount use on Navy fixed- and rotary- wing helmets. microphone is intended for use as a part of the airborne cornunication system which will provide cornunication of high intelligibility under the extreme noise conditions encountered in military aircraft. The microphone is designe
16、d to work with intercornunication system AIC-14, specifically control box C-26450. The preservation, packing, and marking specified herein are intended for direct shipments to the Government. also be used for the preparation of microphones for shipment from the parts contractor to the origi na1 equipment manufacturer. The However, this specification may Preparing Activity: (Project 5965-0220-3) Navy - AS 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
