ASDEC’s non-contact vibrometry is able to map surface velocities on such items as musical instruments or loudspeakers giving design engineers better insight into the acoustics and sound quality performance of their designs.
Trouble with Acoustic Emissions?
Laser Doppler vibrometry also supports the identification of high velocity hot spots contributing to high levels of acoustic emission allowing engineers to concentrate on achieving the best sound reduction with minimum effort thus meeting legislative noise targets.
ASDEC also supports medical acoustics in the development of audiology techniques and hearing aids.
ASDEC has teamed up with the Clinical Audiology and the Department of Technology, De Montfort University, to explore an alternative way of verifying the fitting of hearing aids, through contactless Laser Doppler Vibrometry (LDV).
The key idea is that by measuring the vibrational response of the tympanic membrane using a LDV, the effectiveness of the hearing aid over its working frequency range can be determined. Since LDV is a stand-off measurement technique, there is no requirement for inserting a microphone probe inside the ear canal, making this technique intrinsically safe for use on children and young patients.