Understanding the auditory mechanism and sound conduction
The human ear is one of the most sophisticated sound and vibration amplification systems. Offering ease of operation and unsurpassed accuracy, state-of-the-art laser vibrometers help to determine vibrational characteristics and dynamic properties. They are therefore opening up completely new possibilities for researchers to understand exactly how hearing works. Scientists are using highly sensitive and non-intrusive laser vibrometers to examine not only sound conduction from the eardrum to the stapes footplate in the middle ear, but also the details of electromechanical signal transduction occurring in the cochlea of the inner ear.
The eardrum’s vibration behaviour gives direct insight into the causes of hearing loss, due to stapes fixation or sclerotic changes in the ossicular chain. In medical research, laser tympanometry with laser vibrometers allows the audiologist to quickly measure the eardrum’s frequency response.
HLV Hearing Laser Vibrometer for optical measurement in otology
The human ear is one of the most sophisticated sound and vibration amplification systems. And special measuerement tasks require application-specific instrumentation. For use in ear mechanics and otological research, use the HLV Hearing Laser Vibrometer. See the HLV datasheet for further specification.
Laser vibrometers are also indispensable for the development, inspection, calibration and certification of middle ear implants. In research, laser vibrometers are used during operations to check that middle ear implants and prostheses (TORP, PORP) are securely connected. They therefore help to ensure that operations are successful and to document the same in an audit-proof way.
Related products
VibroScan QTec Xtra
VibroScan QTec Xtra measures vibrations in a new way - without contact, full-field and with unprecedented precision. With its groundbreaking multi-path interferometry, QTec® sets new standards in terms of optical sensitivity and interference immunity. The Xtra, based on an infrared (SWIR) laser is characterized by the highest optical sensitivity to guarantee highly accurate measurements even on demanding technical surfaces. VibroScan QTec Xtra ensures maximum portability through integrated data acquisition and signal generator up to 32 MHz.
VibroOne
The laser Doppler vibrometer VibroOne® is the one-box solution for non-contact vibration measurement up to 3 MHz. It is specifically designed for tightly packed setups, whether in research laboratories, challenging production environments or for non-contact analysis of tiny details on microstructures or biomedical probes. The optional inline HD+ camera helps positioning the laser precisely and provides proper test documentation.
MSA-100-3D Micro System Analyzer
The 3D Micro System Analyzer records vibration components in all three spatial directions at once. The optical measurement system enables high-resolution 3D vibration analysis from DC up to 25 MHz with amplitude resolutions in the sub-picometer range, for both in-plane and out-of-plane vibration components.
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