Joule’s effect

A very precise determination of the power absorbed in a system is described by Margulis, who compared the ultrasonic conditions to Joule s effect from a calibrated thermistor.35 Other physical measurements of power (pp. 13 and 14), less commonly applied, include the use of microphones, acoustic balances, and the erosion of metallic foils by cavitation. ... 

Gough, in 1805, established that raw rubber becomes warm on being stretched and contracts on being heated. Page, in 1847, and Joule, in 1857, independently reported similar observations. Joule s observations were more quantitative in nature and the aforesaid effect is hence referred to as Joule s effect [6]. 

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