• Designed for Sony a7R IV
  • Mounts via Sony Multi Interface Shoe
  • 3 x Selectable Directivity Patterns
  • Selectable Digital/Analog Output
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Three directivity modes

Advanced digital signal processing makes it possible to offer three switchable directivity patterns in one versatile microphone: super-directional, unidirectional, and omnidirectional.


Super-directivity in a compact mic

Eight high-performance microphone units work with a newly developed beamforming algorithm to provide extremely sharp directivity that effectively rejects off-axis sound. All of this is achieved in a remarkably compact microphone that is only 99.3mm in length.


Great sound with low noise

When connected via the Multi Interface Shoe of a compatible camera that features a built-in digital audio interface, the audio signal is directly transferred to the camera in digital form so that no degradation can occur. A simple switch also provides compatibility with a wide range of cameras using an analogue interface.


Cable-free connection

Simply clip the microphone into the Multi Interface Shoe on a compatible camera for direct power and audio connections without the need for extra cables or batteries. Sony’s Multi Interface Shoe offers intelligent connectivity and control for a variety of accessories, providing maximum flexibility and mobility for α system shooting.


Mechanical noise suppression

An advanced shock and vibration suppressing design effectively minimises low-frequency, or handling, noise that can degrade audio quality. The absence of connecting cables also means that no noise can be transmitted to the microphone mechanically via cables and connectors.


Effective filter for clear sound

A low-cut filter that cuts out subsonic noise is implemented through digital signal processing, maximising audio quality at the recording stage and thereby reducing the need for complex post processing.


Essential controls

Record level control, analogue output for compatibility with a wide range of cameras, and an attenuator that makes it easy to set optimum signal levels all add to this microphone’s versatility. This level of control can contribute to smooth, stress-free post production.


Wind screen supplied

The ECM-B1M is supplied with a fur type wind screen that can reduce wind noise when shooting outdoors.



  • Compact, lightweight design, 99.3mm (4 in) long, and 77.3g (2.8 oz)
  • Pickup pattern: Super-directional / Unidirectional / Omnidirectional (selectable)
  • Digital-interface compatible Multi Interface Shoe for clear sound
  • Comprehensive manual control for optimal sound capture
  • Wind screen supplied


Form Factor Camera-Mount
Sound Field Mono
Operating Principle Pressure Gradient
Pressure Operated
Capsule 8 x Electret Condenser
Polar Pattern Cardioid, Omnidirectional, Supercardioid
Pattern Selection Switched
Orientation End Address
Circuitry Solid-State
Pad -10 dB
-20 dB
High-Pass Filter Yes
Tone Adjustment None
Gain Adjustment Yes
Indicators None
On-Board Controls Gain, Polar Pattern, High-Pass Filter, Pad
Windscreen Foam (Included)


Frequency Range 40 Hz to 20 kHz
Maximum SPL 120 dB SPL
Sensitivity -20 dBFS at 1 kHz
Dynamic Range 106 dB
Equivalent Noise Level 14 dB SPL


Output Connectors 1 x Proprietary
1 x Micro-USB
Wireless Connectivity None

Digital Audio

Digital Signal Processing Noise Reduction
Internal Memory None


Operating Voltage Not Specified by Manufacturer


Color Black
Mounting Camera-Mount
Operating Temperature 32 to 104°F / 0 to 40°C
Storage Temperature -4 to 131°F / -20 to 55°C
Dimensions H: 3.22 x W: 1.08 x L: 3.91″ / H: 81.8 x W: 27.4 x L: 99.3 mm
Weight 2.8 oz / 79 g


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