7,60.299] MAX. | on MR-28406-000 SHT 1.1 ORIENTATION OF HOLE O16,38540,125 B22, 120, 10 PATTERN NOT FIXED [D.645+.005] J [DB .87+.004] | NOTE: [RESISTANCE OF 100 KILO OHM MINIMUM BETWEEN BLACK -ve LEAD D025 AND FRONT HOUSING [7,955+.195] RED oN Yo -ve / / WHITE OUTPUT Revision C.0. # Implementation Date RELEASE LEVEL REVISION DIMENSIONS IN MILLIMETERS CINCHES] > sa Released A SCALE: | : | DR. BY DATE KNOWLES ELECTRONICS oe DO NOT SCALE DRAWING cy bate ITASCA, ILLINOIS U.S.A. me WATERPROOF MICROPHONE] MR-2840B-O00 [92 8-25-05 APP. BY DATE OUTLINE DRAWING SHT 1.1 GJP_ 8-25-06 KELL IASI7F FRM Rey: A MR-28406-000 NO DAMPING SHEET 2.1 * = -35 dB = ~40 3 45 > ony e _ -50 o " % - qv HBS 55 at Ps a8 wet by Bz -60 _nede? sh of Le en ee Lede Leer 5 uwY =e 65 2 Sa 70 =8 as 15 2 3 4 5 6 189 2 3 4 5 6 789 1000 10000 FREQUENCY IN HERTZ SENSITIVITY vl NFORMITY FREQUENCY MIN NOM MAX RANGE OF DEVIATION FROM IKHz 100 --- 61.5 soe 4.0 +2.0 1000 -65.0 60.0 -58.0 oo oo: 4700 APPROX 47.0 oe +8.0 +20.0 NOTES: |.CASE OF MICROPHONE CONNECTED TO NEGATIVE BLACK LEAD. 2. BELLOWS HOUSING INSULATED FROM MICROPHNOE CASE. 3.MICROPHONE TO BE FUNCTIONAL WITH 20 VDC SUPPLY, 4, CONFORMS TO REQUIREMENTS SHOWN ON SELECTRET MICROPHONE ENVIRONMENTAL QUALIFICATION TEST, BT-1759 SHEET 2 5. INDIVIDUAL SPECIFICATIONS. SENSITIVITY "A" WEIGHTED oD keout tom | DC | OUTPUT IMPEDANCE | AMPLIFIER CHANGE ON NOSE SENSITIVITY SUPPY OHMS CURRENT DRAIN REDUCING IKHZ EQUIVALENT SPL OHMS v uA MAX, SUPPLY TO dB SPL MAX MIN. | MOM. | MAX. .9VDC 10000 1.3 | 2000 | 3500 | 6000 50 3 dB MAX. 30 RED +ve 1.3V Hi BLACK -ve 10K wf OUTPUT Revision C.0. # Implementation Date RELEASE LEVEL REVISION | A MIOIOII73 8-21-06 Re eased A WHEN TEST LIMITS ARE USED TO ESTABLISH INCOMING INSPECTION ACCEPTANCE /REJECT ION ff OR. BY OATE CRITERIA, CORRELATION OF TEST EQUIPMENT WITH KNOWLES I$ ALSO REQUIRED FOR ELIMINATION OF EQUIPMENT AND TEST METHOD VARIATION LSY 8-21-06 KNOWLES ELECTRONICS TE ITASCA, ILLINOIS U.S.A. mms WATERPROOF MICROPHONE| MR-2@406-000 [22 2-25-08 APP. BY DATE PERFORMANCE SPECIFICATION SHT 2.1 GP 8-25-06