Eta100 Ultra

Optical Microphone

XARION's Eta100 Ultra membrane-free optical microphone is able to listen to the entire acoustic frequency bandwidth that can be physically transmitted through air. The patented sensor technology allows coverage of the range from 10 Hz to 1MHz with a single sensor head. It was specially designed for very high sound pressure levels up to 180 dB (A) SPL.


  • Membrane-free optical microphone
  • For very high sound pressure levels
  • Frequency range: 10 Hz–1 MHz (acoustics and ultrasonics)
  • Dynamic range: 80–180 dB (A) SPL