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FOMRI Noise Cancelling Microphones    IMROC Communications Systems  
SPL Monitoring    Sound Level Metering

FOMRI Noise Cancelling Microphones

The ultimate fMRI microphone.

Optoacoustics’ noise cancelling Fiber Optical MRI (FOMRI™) microphone is today's gold standard for advanced MRI environments, delivering unsurpassed speech intelligibility, and ease of use.

Our third generation FOMRI represents a major step forward for fiber optic microphone technology, providing the clearest speech quality ever, with low-latency adaptive noise cancelling. The FOMRI-III also introduces the ability to synchronize speech in real time with TTL signal outputs. Finally, the latest FOMRI sets a new standard for simplicity of installation and operation.

With a frequency range of 50-20,000 Hz, a dynamic range of 100 dB, and four selectable noise reduction modes of up to 40 dB, FOMRI-III now provides the highest quality solution available for MRI speech reproduction and recording in real-time.

The FOMRI’s fiber optic microphone technology is invisible to MR equipment, making it completely safe to use. The FOMRI is already used in hundreds of research centers and hospitals worldwide and is cited widely.

FOMRI-III Features

 Crisp, clear speech in real time
 Built-in console loudspeaker
 Selectable, automatic noise reduction
 Synchronized TTL signals
 Speech output broadcast mode
 Plug-and-play operation
 Easy microphone mounting on your RF coil
 Completely safe, EMI/RFI immune system

FOMRI has been developed in close collaboration with the world's leading MRI research institutes. The acoustic problem in MRI is widely regarded as the most challenging in the world of noise: patterns vary between scan modes, scanner types, scanner rooms and bore specifications. These variations are often dramatic and are expressed in numerous audio characteristics such as frequency resonance range, duty cycle and envelope. After nearly a decade of constant development and improvement, FOMRI hardware and noise cancelling algorithms are robust enough to handle all noise variations.

FOMRI eliminates most EPI acoustic noise and provides real-time adaptive noise cancelling that results in excellent clarity. FOMRI-III operation is automatic, though a user may choose to adjust certain critical parameters.

All FOMRI adaptive noise-cancelling capabilities are implemented using a built-in hardware DSP.

Accessories

 Fitted disposable hygienic screens to remove
   pop noise and enable exact FOMRI distance
   and orientation to patient’s mouth (100 pack)
 Fiber optic cable extensions from 10 to 50 meters


Key Applications

 Interactive patient communications during fMRI
   scan procedures
 Speech studies in fMRI
 Patient communications in interventional MRI
   environments

Hear the FOMRI System

 FOMRI-III Brochure
  More Information

 FOMRI-I
 FOMRI-II

FOMRI attached to standard head coil

FOMRI attached to standard head coil

Pop Screens

Optoacoustics' Disposable Pop Screens


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