Processing and Power
High-power applications of ultrasound often use frequencies between 20 kHz and a few hundred Khz. Power densities can be very high; above 10 watts/square centimeter, cavitation can be inducted in liquid media, and some applications use up to 1000 watts per square centimeter. Such high power levels can induce chemical changes or produce significant effects by direct mechanical action, and can inactivate harmful microrganisms.
Read more about this topic: Ultrasound
Famous quotes containing the word power:
“The dignity and stability of government in all its branches, the morals of the people, and every blessing of society, depend so much upon an upright and skilful administration of justice, that the judicial power ought to be distinct from both the legislative and executive, and independent upon both, that so it may be a check upon both, as both should be checks upon that.”
—Thomas Jefferson (1743–1826)