EK-23132-000 Knowles Acoustics, EK-23132-000 Datasheet - Page 26
![MIC ELECTRET OMNI FREQ RESPONSE](/photos/0/4/447/ek-23132_sml.jpg)
EK-23132-000
Manufacturer Part Number
EK-23132-000
Description
MIC ELECTRET OMNI FREQ RESPONSE
Manufacturer
Knowles Acoustics
Series
EK/EYr
Type
Electret Condenserr
Specifications of EK-23132-000
Sensitivity
-53dB ±2dB
Voltage - Rated
1.3V
Current
50µA
Size / Dimension
Rectangular - 5.56mm L x 3.99mm W x 2.21mm H
Impedance
4.4K Ohm
Frequency
100Hz ~ 10kHz
Termination
Solder Pads
Direction
Omnidirectional
Port Location
Top
Dimensions
5.56 mm L x 3.98 mm W x 2.21 mm D
Depth
2.21 mm
Length
5.56 mm
Width
3.98 mm
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Filter Type
-
S/n Ratio
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
423-1008
EK-23132
EK-3132
EK3132
EK-23132
EK-3132
EK3132
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MICROPHONES
Microphones measure sound pressure. Inside a Knowles microphone is a thin flexible diaphragm, an electrically
charged plate, and an amplifier (Fig. 1). The output voltage is proportional to changes in the small separation
between the diaphragm and the charged plate (Fig. 2).
As sound pressure inside the front cavity increases, the diaphragm is pushed closer to the plate. As the
pressure decreases, it moves further away. The motion of the diaphragm produces a small electrical signal that
is amplified by a miniature circuit inside the microphone.
The sensitivity of a typical Knowles’ microphone is measured in units of dB relative to 1 Volt per 0.1 Pascal.
Fig 1: Cross section of a Knowles EM microphone
FIG. 2: EM diaphragm and electret
MICROPHONE AND SPEAKER BASICS
MICROPHONE AND SPEAKER BASICS
AMPLIFIER
OUTPUT TERMINAL
CHARGE PLATE
CHARGE PLATE
DIAPHRAGM
DIAPHRAGM
www.knowles.com
FRONT CAVITY
AIR GAP SEPARATION
WIRE
SOUND PRESSURE