Sony ECM-44BMP Omnidirectional Lav Mic

Affordable omni-directional lapel microphone for use with WRT-822 and WRT-8B wireless transmitters. Supplied with a 3-pole locking mini plug for use with the bodypack transmitter included in the UWP series.

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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-44BMP, has a 3.5mm locking jack for use with WRT-805 wireless transmitter.

  • 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 wireless systems

    The ECM-44BMP is compatible with the Sony Freedom WRT-805 wireless transmitter.



Audio Section

Capsule Type Electret Condenser
Frequency Response 40 Hz to 15 kHz
Directivity Omni-directional
Sensitivity *[1] -40.0 dB (10 mV)
Output Impedance *[2] 2.5kΩ±30%, Unbalanced
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

Connector BC type. Supplied with Sony 4-pin (SMC9-4P) connector
Mic Cable 3.9 feet
1.2 m
Power Requirements DC 1.1 V to 10.0V
Power Consumption 0.4 mA or less
Dimensions *[8] φ8.5 x 14.5 mm (Mic head)
φ11/32 x 19/32 inches (Mic head)
Approx. 24 g
Approx. 0.8 oz
Supplied Accessories Urethane type windscreen (1)
Single/horisontal type tie clip (1)
Operating instructions (1)
Mic case (1)
Optional Accessories Wind screen pack
Horizontal single-clip pack


Note *[1] 0 dB = 1 V/Pa, at 1 kHz
*[2] Output impedance at 1 kHz
*[3] A-weighted, 1 kHz, 1 Pa.
*[4] 0dB SPL = 20? Pa.
*[5] dB SPL/1E-7 T, 0 dB SPL = 20? Pa.
*[6] Wind noise at 2m/s (0 dB SPL = 20?Pa.)
*[7] 0 dB SPL = 20? Pa.
*[8] The values for dimensions are approximate.