CM-28431-000 Knowles Acoustics, CM-28431-000 Datasheet - Page 12

• Manufacturer Part Number: CM-28431-000
• Description: SPEAKER W/FLEX TABS LP Z=30
• Manufacturer: Knowles Acoustics
• Series: CMr
• Type: Magnetic, Balanced Armature, Face Portr

Specifications of CM-28431-000

• Impedance: 30 Ohm
• Size / Dimension: 16.54mm Dia x 8.26mm H
• Termination: Flex Contacts
• Shape: Round
• Transducer Function: Speaker
• Resonant Frequency: 1kHz
• External Diameter: 16.64mm
• External Width: 16.64mm
• Sound Level Spl: 119dB
• Outer Diameter: 16.64mm
• Sensitivity, Db: 103dB
• Rohs Compliant: Yes
• Sensitivity (db): 103dB
• External Depth: 8.38mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Rated: -
• Power - Max: -
• Frequency Range: -
• Sound Pressure Level: -
• Material - Cone: -
• Material - Magnet: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 423-1037; CM-28431; CM-8431; CM8431

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SPECIALTY TRANSDUCERS – Microphones
WP SERIES
Omnidirectional, Noise Canceling 4.00 x 5.59 x 2.28 (mm)
Knowles’ waterproof microphones survive immersion in water. The WP Series’ form
factor is a very small size with low vibration sensitivity. The excellent noise canceling
performance is useful for sensors and instrumentation. The WP Series are available in
boom microphone packages. (See the FB Series and PNR/PWP Series for details.)
MR SERIES
Omnidirectional 22.12 DIA x 9.3 (mm)
The MR Series Assemblies consist of a microphone element attached to
a waterproof bellows assembly. They may be panel mounted, attached for
boom applications, and are suitable for outdoor use or repeated submersion.
Note: All performance curves are typical
WP-23501-000
WP-23502-000
WP-23502-P07
WP-23502-P16
WP-23849-C36
M M o o d d e e l l
M M o o d d e e l l
MR-23151-000
MR-23793-000
MR-28406-000
Sensitivity @1kHz
– Waterproof Microphone
– Waterproof Microphone
(dB re1V/1Pa)
Sensitivity @1kHz
(dB re1V/1Pa)
-34.0±3
-32.0±3
-32.0±3
-32.0±3
-32.0±3
-67.5±3
-40.0±4
-40.0±3
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Highly waterproof – no loss of performance after immersion
in 15-20 m water
Corrosion resistant
Withstands explosive decompression
Design proven in rugged environments
Cable wire attached
High resistance to mechanical shock
Acoustically transparent bellows
Resists effects of mud, sand, and salt encrustation
Waterproofed to submersion in 1m water
Close-talking (noise-canceling)
Corrosion resistant
Withstands explosive decompression
Excellent environmental performance
High resistance to mechanical shock
Noise Canceling
Omnidirectional
Omnidirectional
Omnidirectional
Omnidirectional
Directivity
DC Supply (Vdc)
N/A
1.3
1.3
DC Supply (Vdc)
Current Drain (uA)
Max. Amplifier
1.3
1.3
1.3
1.3
1.3
www.knowles.com
N/A
100
50
Current Drain (uA)
Max. Amplifier
300
50
50
50
50
Max. “A” Weighted
Equivalent SPL)
Noise (1 KHz
30.0 dB
31.0 dB
30.0 dB
Max. “A” Weighted
Noise (dBV)
-100
-100
-100
-100
-100
-35
-45
-55
-65
-75
-40
-50
-60
-70
-80
Impedance (Ohms)
100
100
Nominal Output
2500
3500
300
2
2
Impedance (Ohms)
Nominal Output
3
3
4
2500
4400
4400
4400
4400
4
5
5
6 7 8 9
6 7 8 9
FREQUENCY (Hz)
FREQUENCY (Hz)
1k
2-wire, 193 mm Leads,
3-wire, 201 mm Leads,
3-wire, 202 mm Leads,
1k
Waterproof to 20 m
Waterproof to 20 m
Waterproof to 20 m
Comments
3-wire, 1 m Shielded Cable
3-wire, 25.4 mm Litz Wires
Extended Response
2-wire, Waterproof
3-wire, Waterproof
2
2
RFI Improved +
Comments
3
3
4
4
5
5
6 7 8 9
6 7 8 9
10k
10k