Electret condenser microphone
Image of the following product: ECM-90LM


Ultra-miniature, omni-directional electret condenser lavalier microphone designed for quality-critical applications in ENG, Studio, EFP, and Location Sound applications. Dual diaphragm design contributes to high sensitivity, wide dynamic range, and low noise. Generous diaphragm mounting architecture radically reduces common cable noise associated with lavalier microphone designs. Flat and wide frequency response (20Hz – 20kHz) provides natural sound reproduction. Water resistant design maintains sound clarity in almost any application or environment. Shielded for use with digital wireless transmitters.


Audio Section
Capsule Type
Electret Condenser
Frequency Response
20 Hz to 20 kHz
Sensitivity *[1]
-40 dB (10mV)
Output Impedance *[2]
6.3 kΩ (unbalanced)
Dynamic Range (typ.)
99 dB
Signal-to-Noise Ratio (typ.) *[3]
68 dB
Inherent Noise (typ.) *[4]
26 dB SPL
Wind Noise *[5]
45 dB SPL or less (with supplied windscreen)
Maximum Input Sound Pressure Level (typ.) *[6]
125 dB SPL
General Section
3-pin Lemo connector
Mic Cable
5.2 feet
Power Requirements
Supplied from Sony wireless system transmitters
Dimensions *[7]
5/32 x 5/32 x 21/26 inches (Mic head)
3.5 x 3.5 x 20.5 mm (Mic head)
Mass (microphone body, excluding cable)
Approx. 0.035oz
Approx. 1g
Supplied Accessories
Urethane type windscreen (1)
Single/vertical type tie clip (1)
Single/horisontal type tie clip (1)
Operating instructions (1)
Optional Accessories
Wind screen pack
Vertical clip pack
Safety clip pack
Horizontal clip pack
Double clip pack
Color windscreen pack
Black windscreen pack
Accessory kit
0 dB = 1 V/Pa, at 1 kHz
Output impedance at 1 kHz
A-weighted, 1 kHz, 1 Pa
0dB SPL = 20 μPa
Wind noise at 2m/s (0 dB SPL = 20 μPa)
0dB SPL = 20 μPa
The values for dimensions are approximate.

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