ECM-44B (ECM44B)

Affordable omni-directional lavalier Electret condenser microphone
Image of the following product: ECM-44B


Sony has produced over five million professional ECM (Electret Condenser Microphones) microphones and the ECM-44 is the affordable, general voice model. It provides good sound quality and is widely used in business presentation systems and TV production. The ECM-44 is available in four versions, featuring different connector types. This model, ECM-44B, is the XLR version with power barrel for use as a wired microphone.
Convenient to use
The ECM-44 is an affordable alternative to the traditional hand held microphone and being 'hands free' it allows the presenter to concentrate on her/his performance
Professional image
Either 'in front of camera' or at a business presentation the ECM-44 creates a professional and tidy image.
Easy to use
It can often be difficult to achieve good quality voice pick-up but the ECM-44 can help get good results. The microphone's capsule is designed for general voice pick-up with a mid-frequency emphasis characteristic and a suitable frequency response.


Tuned for voice pick-up
The ECM-44's capsule features an emphasis curve and a suitable frequency response for voice pick-up.
Compact size
The capsule has a diameter of only 8.5mm and is 14.5mm long.
Ready for wired applications
The ECM-44B is the wired version with an XLR output and integral power supply barrel. This version is to be powered internally by battery (LR6 or AA size). A single AA battery will provide several thousand hours of use.


Audio Section
Capsule Type
Electret Condenser
Frequency Response
40 Hz to 15kHz
Sensitivity *[1]
-53.0 dB ±3 dB
Output Impedance *[2]
250Ω±20%, Balanced
Dynamic Range
90 dB or more
Signal-to-Noise Ratio *[3]
62 dB or more
Inherent Noise *[4]
32 dB SPL or less
Induction Noise From External Magnetic Field *[5]
5 dB SPL or less
Wind Noise *[6]
40 dB SPL or less (with windscreen)
Maximum Input Sound Pressure Level *[7]
122 dB SPL
General Section
B type. Supplied with XLR-3-12C (male) connector in power supply unit (single AA size battery)
Mic Cable
9.8 feet
3 m
Power Requirements
Phamtom Power Not Supported
DC 1.5 V (AA size battery)
Battery Operating Time
Approx. 6000 h (LR6)
Power Consumption
0.3 mA or less
Dimensions *[8]
φ8.5 x 14.5 mm (Mic head)
φ20.0 x 126 mm (Power unit XLR type)
φ13/16 x 5 inches (Power unit XLR type)
φ11/32 x 19/32 inches (Mic head)
Approx. 4.3 oz (with power supply unit)
Approx. 121 g (with power supply unit)
Supplied Accessories
Urethane type windscreen (1)
Single/horizontal type tie clip (1)
Operating instructions (1)
Mic case (1)
Optional Accessories
Wind screen pack
Horizontal single-clip pack
*[1] 0 dB = 1 V/Pa, at 1 kHz
*[2] Output impedance at 1 kHz
*[3] A-weighted, 1 kHz, 1 Pa.
*[4] 0 dB SPL = 20 μPa.
*[5] dB SPL/1E-7 T, 0 dB SPL = 20 μPa.
*[6] Wind noise at 2m/s (0 dB SPL = 20 μPa.)
*[7] 0 dB SPL = 20 μPa.
*[8] The values for dimensions are approximate.

Resources and downloads


Register your product

Expert engineers, certified repairs and genuine spare parts – all at no extra cost. Try PrimeSupport today.