BU-21771-000 SHT I.1 NOTE: LOCATED FROM TWO SURFACES FOR CUSTOMER CONVENIENCE 71,8740, 05 ONLY APPLICABLE FROM ONE SURFACE, NOT TO BE USED [.310+.002] TOGETHER. HORIZONTAL LOCATION FOR TERMINAL CENTERED TO 0, 170.007]. 5,94+0,05 [.218+.002] 1,610,10 > -- [.064+ .004] |, 6140, 10 |,350,07 [.064+ .004] 053: 0031, | | 42 A > > Tk0,07 ta 060.07 [. 107+ .003] [.160+.003] 0,64 [.025] MAXIMUM SOLDER BUILDUP NEGATIVE POSITIVE TERMINAL TERMINAL OUTPUT TERMINAL Revision | C.0. # Implementation Date RELEASE LEVEL REVISION NOMINAL WEIGHT .28 GRAM B MIO101515 1-16-07 DIMENSIONS IN MILLIMETERS [INCHES] {ee ae Released B SCALE: 2:1 DR. BY DATE KNOWLES ELECTRONICS ey DO NOT SCALE DRAWING ck. BY DATE ITASCA, ILLINOIS U.S.A. . ' : VIBRATION TRANSDUCER} BU-21771-000 |52 2-18-06 APP. BY DATE OUTLINE DRAWING SHT 1.1 GJP_ 9-18-06 KETTIASIZE.FRM Rev: BBU-21771-000 SHEET 2.1 S ~ -25 4B = - 30 Oo ~ -35 ws eo -A0 =o Lee" we 45 amen of Bw -50 _S 55 == 60 Ss are -65 Zo 2 3 4 5 6 789 2 3 4 5 6 7189

IATURE PERFORMANCE MICROPHONES * In front firing application without mesh, at -3dB points after resonance peaks, without EQ correction MOUSER STOCK NO. Knowles Part No. 721-BEM23346D47 721-BEM24368D47 721-BJ-21590-000 721-BL-21785-000 721-BU-27135-000 721-BU-21771-000 721-EA-21842-C36 721-EM-23046-P16 721-EM-23046-C36 721-FG-23329-P07 721-FG-23629-C36 721-FG-23629-P16 721-FG-23652-P16 721-NR-23158-000 721-NR-23160-000 721-EK-23024-C36 721-EK-23029-C36 721-TM24568000 721-TO-24611-000 721-TO30043000 721-VEK-H-30108-000 721-VFG-30747-000 * 721-WP-23501-000 721-WP-30113-P03 Dimensions: mm BEM-23346-D47 BEM-24368-D47 BJ-21590-000 BL-21785-000 BU-27135-000 BU-21771-000 EA-21842-C36 EM-23046-P16 EM-23046-C36 FG-23329-P07 FG-23629-C36 FG-23629-P16 FG-23652-P16 NR-23158-000 NR-23160-000 EK-23024-C36 EK-23029-C36 TM-24568-000 TO-24611-000 TO-30043-000 VEK-H-30108-000 VFG-30747-000 WP-23501-000 WP-30113-P03 A 3.57x3.57x2.21 3.57x3.57x2.21 7.92x5.7x4.14 7.87x5.54x2.24 7.92x5.59x4.14 7.87x5.54x4.

CONDITIONS -25 -35 -45 -55 -65 100 2 3 4 5 6 7 89 2 3 4 5 6 7 89 1k 2 3 4 5 6 7 89 10k FREQUENCY (Hz) Model Thickness Sensitivity @1 KHz (dB re 1Vg) DC Supply (V) Max. Current Drain (uA) Nominal Output Impedance @1 KHz (Ohms) "A" Weighted Noise (dBre. 1V) BU-21771-000 4.06 -45.04.5 1.5 50 5200 -103 BU-23173-000 4.06 -39.04.5 1.5 50 5200 -103 BU-23842-000 2.24 -40.04.0 1.5 50 5200 -103 BU-27135-000 2.24 -45.04.5 1.5 300 5200 -103 BF Series - Acoustic Damper Screens Dampers are acoustic cloth screens for insertion inside acoustic tubing. These damping elements are used between the speaker outlet and the ear canal to smoothen the frequency response. s 3MOOTHEN AND SHAPE FREQUENCY RESPONSE s 6ARIOUS ACOUSTICAL RESISTANCES AND SIZES Model Thickness NominaL Acoustic Resistance (Ohms) PLUG (mm) SCREEN (mm) BF-1859-000 BF-1860-000 BF-1861-000 BF-1921-000 BF-1922-000 BF-1923-000 BF-1988-000 BF-1991-000 BF-1995-000 BF-1997-000 BF-1999-000 BF-3034-000 BF-3035-000 BF-3036-000 BF-3037-000 BF-3038-000 BF-3039-

CONDITIONS -25 -35 -45 -55 -65 100 2 3 4 5 6 7 89 2 3 4 5 6 7 89 1k 2 3 4 5 6 7 89 10k FREQUENCY (Hz) Model Thickness Sensitivity @1 KHz (dB re 1Vg) DC Supply (V) Max. Current Drain (uA) Nominal Output Impedance @1 KHz (Ohms) "A" Weighted Noise (dBre. 1V) BU-21771-000 4.06 -45.04.5 1.5 50 5200 -103 BU-23173-000 4.06 -39.04.5 1.5 50 5200 -103 BU-23842-000 2.24 -40.04.0 1.5 50 5200 -103 BU-27135-000 2.24 -45.04.5 1.5 300 5200 -103 BF Series - Acoustic Damper Screens Dampers are acoustic cloth screens for insertion inside acoustic tubing. These damping elements are used between the speaker outlet and the ear canal to smoothen the frequency response. s 3MOOTHEN AND SHAPE FREQUENCY RESPONSE s 6ARIOUS ACOUSTICAL RESISTANCES AND SIZES Model Thickness NominaL Acoustic Resistance (Ohms) PLUG (mm) SCREEN (mm) BF-1859-000 BF-1860-000 BF-1861-000 BF-1921-000 BF-1922-000 BF-1923-000 BF-1988-000 BF-1991-000 BF-1995-000 BF-1997-000 BF-1999-000 BF-3034-000 BF-3035-000 BF-3036-000 BF-3037-000 BF-3038-000 BF-3039-

ucer * High vibration sensitivity * Small size * Wide frequency range * Integral FET amplifier * High resistance to mechanical shock * Withstands severe environmental conditions -25 -35 -45 -55 -65 100 2 3 2 4 5 6 7 89 3 4 5 6 7 89 1k FREQUENCY (Hz) Model BU-21771-000 BU-23173-000 BU-23842-000 BU-27135-000 Thickness Sensitivity @ 1KHz (dB re 1V/g) DC Supply (V) Max. Current Drain (uA) 4.06 4.06 2.24 2.24 -45.04.5 -39.04.5 -40.04.0 -45.04.5 1.5 1.5 1.5 1.5 50 50 50 300 Nominal Output Impedance @1 KHz (Ohms) 5200 5200 5200 5200 BF Series - Acoustic Damper Screens Dampers are acoustic cloth screens for insertion inside acoustic tubing. These damping elements are used between the speaker outlet and the ear canal to smoothen the frequency response. * Smoothen and shape frequency response * Various acoustical resistances and sizes 16 Model Color Nominal Acoustic Resistance (Ohms) PLUG (mm) SCREEN (mm) BF-1859-000 BF-1860-000 BF-1861-000 BF-1921-000 BF-1922-000 BF-1923-000 BF-1988-000 BF-1991-000 BF-199

ucer * High vibration sensitivity * Small size * Wide frequency range * Integral FET amplifier * High resistance to mechanical shock * Withstands severe environmental conditions -25 -35 -45 -55 -65 100 2 3 2 4 5 6 7 89 3 4 5 6 7 89 1k FREQUENCY (Hz) Model BU-21771-000 BU-23173-000 BU-23842-000 BU-27135-000 Thickness Sensitivity @ 1KHz (db re 1V/g) DC Supply (V) Max. Current Drain (uA) 4.06 4.06 2.24 2.24 -45.04.5 -39.04.5 -40.04.0 -45.04.5 1.5 1.5 1.5 1.5 50 50 50 300 Nominal Output Impedance @1 KHz (Ohms) 5200 5200 5200 5200 BF Series - Acoustic Dampers Dampers are acoustic cloth screens for insertion inside acoustic tubing. These damping elements are used between the speaker outlet and the ear canal to smoothen the frequency response. * Smoothen and shape frequency response * Various acoustical resistances and sizes 14 Model Color Nominal Acoustic Resistance (Ohms) PLUG (mm) SCREEN (mm) BF-1859-000 BF-1860-000 BF-1861-000 BF-1921-000 BF-1922-000 BF-1923-000 BF-1988-000 BF-1991-000 BF-1995-000 B

CONDITIONS -25 -35 -45 -55 -65 100 2 3 4 5 6 7 89 2 3 4 5 6 7 89 1k 2 3 4 5 6 7 89 10k FREQUENCY (Hz) Model Thickness Sensitivity @1 KHz (dB re 1Vg) DC Supply (V) Max. Current Drain (uA) Nominal Output Impedance @1 KHz (Ohms) "A" Weighted Noise (dBre. 1V) BU-21771-000 4.06 -45.04.5 1.5 50 5200 -103 BU-23173-000 4.06 -39.04.5 1.5 50 5200 -103 BU-23842-000 2.24 -40.04.0 1.5 50 5200 -103 BU-27135-000 2.24 -45.04.5 1.5 300 5200 -103 BF Series - Acoustic Damper Screens Dampers are acoustic cloth screens for insertion inside acoustic tubing. These damping elements are used between the speaker outlet and the ear canal to smoothen the frequency response. s 3MOOTHEN AND SHAPE FREQUENCY RESPONSE s 6ARIOUS ACOUSTICAL RESISTANCES AND SIZES Model Thickness NominaL Acoustic Resistance (Ohms) PLUG (mm) SCREEN (mm) BF-1859-000 BF-1860-000 BF-1861-000 BF-1921-000 BF-1922-000 BF-1923-000 BF-1988-000 BF-1991-000 BF-1995-000 BF-1997-000 BF-1999-000 BF-3034-000 BF-3035-000 BF-3036-000 BF-3037-000 BF-3038-000 BF-3039-

CONDITIONS -25 -35 -45 -55 -65 100 2 3 4 5 6 7 89 2 3 4 5 6 7 89 1k 2 3 4 5 6 7 89 10k FREQUENCY (Hz) Model Thickness Sensitivity @1 KHz (dB re 1Vg) DC Supply (V) Max. Current Drain (uA) Nominal Output Impedance @1 KHz (Ohms) "A" Weighted Noise (dBre. 1V) BU-21771-000 4.06 -45.04.5 1.5 50 5200 -103 BU-23173-000 4.06 -39.04.5 1.5 50 5200 -103 BU-23842-000 2.24 -40.04.0 1.5 50 5200 -103 BU-27135-000 2.24 -45.04.5 1.5 300 5200 -103 BF Series - Acoustic Damper Screens Dampers are acoustic cloth screens for insertion inside acoustic tubing. These damping elements are used between the speaker outlet and the ear canal to smoothen the frequency response. s 3MOOTHEN AND SHAPE FREQUENCY RESPONSE s 6ARIOUS ACOUSTICAL RESISTANCES AND SIZES Model Thickness NominaL Acoustic Resistance (Ohms) PLUG (mm) SCREEN (mm) BF-1859-000 BF-1860-000 BF-1861-000 BF-1921-000 BF-1922-000 BF-1923-000 BF-1988-000 BF-1991-000 BF-1995-000 BF-1997-000 BF-1999-000 BF-3034-000 BF-3035-000 BF-3036-000 BF-3037-000 BF-3038-000 BF-3039-

ucer * High vibration sensitivity * Small size * Wide frequency range * Integral FET amplifier * High resistance to mechanical shock * Withstands severe environmental conditions -25 -35 -45 -55 -65 100 2 3 2 4 5 6 7 89 3 4 5 6 7 89 1k FREQUENCY (Hz) Model BU-21771-000 BU-23173-000 BU-23842-000 BU-27135-000 Thickness Sensitivity @ 1KHz (dB re 1V/g) DC Supply (V) Max. Current Drain (uA) 4.06 4.06 2.24 2.24 -45.04.5 -39.04.5 -40.04.0 -45.04.5 1.5 1.5 1.5 1.5 50 50 50 300 Nominal Output Impedance @1 KHz (Ohms) 5200 5200 5200 5200 BF Series - Acoustic Damper Screens Dampers are acoustic cloth screens for insertion inside acoustic tubing. These damping elements are used between the speaker outlet and the ear canal to smoothen the frequency response. * Smoothen and shape frequency response * Various acoustical resistances and sizes 16 Model Color Nominal Acoustic Resistance (Ohms) PLUG (mm) SCREEN (mm) BF-1859-000 BF-1860-000 BF-1861-000 BF-1921-000 BF-1922-000 BF-1923-000 BF-1988-000 BF-1991-000 BF-199

CONDITIONS -25 -35 -45 -55 -65 100 2 3 4 5 6 7 89 2 3 4 5 6 7 89 1k 2 3 4 5 6 7 89 10k FREQUENCY (Hz) Model Thickness Sensitivity @1 KHz (dB re 1Vg) DC Supply (V) Max. Current Drain (uA) Nominal Output Impedance @1 KHz (Ohms) "A" Weighted Noise (dBre. 1V) BU-21771-000 4.06 -45.04.5 1.5 50 5200 -103 BU-23173-000 4.06 -39.04.5 1.5 50 5200 -103 BU-23842-000 2.24 -40.04.0 1.5 50 5200 -103 BU-27135-000 2.24 -45.04.5 1.5 300 5200 -103 BF Series - Acoustic Damper Screens Dampers are acoustic cloth screens for insertion inside acoustic tubing. These damping elements are used between the speaker outlet and the ear canal to smoothen the frequency response. s 3MOOTHEN AND SHAPE FREQUENCY RESPONSE s 6ARIOUS ACOUSTICAL RESISTANCES AND SIZES Model Thickness NominaL Acoustic Resistance (Ohms) PLUG (mm) SCREEN (mm) BF-1859-000 BF-1860-000 BF-1861-000 BF-1921-000 BF-1922-000 BF-1923-000 BF-1988-000 BF-1991-000 BF-1995-000 BF-1997-000 BF-1999-000 BF-3034-000 BF-3035-000 BF-3036-000 BF-3037-000 BF-3038-000 BF-3039-

* AUDIBLE SIGNALS MICROPHONES, MICROPHONE ASSEMBLIES AND SPEAKERS 2 Fig. 1 Fig. 2 Fig. 3 Fig. 6 Mfg. Part No. EA-21842-000 EA-21842-C36 EK23024 EK-23024-C36 EK-23132-000 FG-23329-C05 FG-23329-P07 Fig. 1 1 1 1 2 3 3 WP-23502-000 4 BL-21785-000 BJ-21590-000 BU-21771-000 5 6 7 MR-23151-000 8 MR-23333-000 MR-28406 8 8 Mfg. Part No. CM-28431-000 Fig. 7 Description Electret Omni-Directional Electret Omni-Directional Electret Omni-Directional Electret Omni-Directional Electret Omni-Directional Electret Omni-Directional Electret Omni-Directional with 1m Cable Attached Waterproof Electret Omni-Directional Piezo Ceramic Magnetic Omni-Directional Accelerometer Vibrations Sensing Waterproof Magnetic 2 cable wire Waterproof Magnetic 2 cable wire Fig. 9 Fig. 4 Nominal DC Resistance () 8.5 Fig. 5 Fig. 9 Fig. 8 Sensitivity @ 1KHz dB Relative dB Relative to 1V/1 Pa to 1V/0.1 Pa -39 4 -59 4 ... -59 3 -33 3 -53 2 -33 2 -53 3 -33 3 -53 3 -33 3 -53 3 -33 3 -53 3 Price Each DC Supply Voltage 0.9 - 10 0.9 - 10 0.9 - 10