Eta450 Ultra

Optical Microphone

The Eta450 Ultra membrane-free optical microphone is XARION’s most sensitive device. It is designed for contact-free ultrasound material testing. The frequency bandwidth expands from 50 kHz to 2 MHz making the sensor the perfect match for broadband, laser-ultrasound excitation. This small-sized and contact-free testing setup is particularly suitable for the characterization of composite materials, weld spots and adhesive joints.


  • Membrane-free optical microphone
  • Ultra-low self-noise
  • Frequency range 50 kHz–2 MHz
  • Dynamic range: 30–130 dB (A) SPL