Optoacoustic phenomena in insulating oils

Sonoluminescence is a process by which light is emitted from collapsing ultrasound-driven gas bubbles in a liquid. Recent works on sonoluminescence have shown that many parameters of the dissolved gas, surrounding liquid and external conditions influences this phenomenon 10]. The light intensity and emitted light spectra depends mainly on the fluid and dissolved gases properties 9,13]. These features indicate the possibility of estimating the amount of dissolved chemical compounds in liquids. The use of sonoluminescence for aging properties diagnostic of insulation oils was proposed. This article presents the schematic of used measurement setup and points out the difficulties in the research resulted from subtleness of the process and no fully accepted sonoluminescence theory.