Measurement and visualization of vibroacoustic fields caused by impact on solid surfaces

The system for measuring and visualization of vibroacoustic fields, and observation of propagation of acoustic waves of various types on solids surfaces was developed. It is possible to reconstruct the measured vibration or compute modes of vibration (movie, animation) and determine types of acoustic waves and their speeds from the measured data arrays. The vibroacoustic fields of some objects were measured (glass block, steel block, rod, pipe, etc.) in a frequency range from 1 kHz to 10 MHz. The amplitudes of vibrations range from 10 to 2000 nm. Different devices for reception and actuation of vibrations were developed and used: piezoelectric, electromagnetic, microphones, etc. The results of the investigation are presented in CD-ROM (conditions of measurement, animated vibrations, modes).