EPI 64 Scan: OptoACTIVE Passive Canceling Only
 EPI 64 Scan: OptoACTIVE Passive Canceling Only
EPI 64 Scan: OptoACTIVE Active Noise Canceling
 EPI 64 Scan: OptoACTIVE Active Noise Canceling
TR 2000 Scan: OptoACTIVE Passive Canceling Only
 TR 2000 Scan: OptoACTIVE Passive Canceling Only
TR 2000 Scan: OptoACTIVE Active Noise Canceling
 TR 2000 Scan: OptoACTIVE Active Noise Canceling

Note that you may wish to lower the volume of your speakers before sampling these sounds.

Above are 'before and after' recorded audio samples and waveforms from typical MRI systems using OptoACTIVE. All recordings are made directly from the OptoACTIVE headphones inside the MRI bore.  
 

How OptoACTIVE Active Noise Control Works

EPI sequences used in MR imaging can produce acoustic noise levels as great as 130 dB (about as loud as a jet plane at takeoff), as well as very high electromagnetic and radio frequency noise. These noises are not just discomforting to patient and staff alike, they make standard noise reduction devices completely ineffective.
OptoACTIVE removes the most difficult and disturbing sequence noise, enabling calm, quiet communications and interactions between patients and MRI staff, even during the noisiest scans.

We achieve this using two complementary techniques:

  • Optimal passive noise reduction with a revolutionary design, resulting in unsurpassed sound clarity, wearer comfort and safety
  • Real-time algorithmic, out-of-phase harmonic active noise cancelling using our proprietary DSP

The OptoACTIVE system provides the highest level of noise reduction available in MRI-safe headphones, safely and effectively canceling EPI main gradient resonance by 60 dB (over 95%) without latency.