You'd think the iPhone panopticon would make two-party consent laws look antiquated. Yet some states are enforcing them more vigorously than ever. In Illinois, for example, civil-liberties advocates are challenging a law that says you can be thrown in jail for 15 years for recording a conversation with a police officer.
The use of weighting networks gives a single number as a measure of vibration exposure and is expressed as the frequency-weighted vibration exposure in metres per second squared (m/s2), units of acceleration. Vibration meters equipped with accelerometers can be used for instantaneous vibration measurement.
Ultrasonic And Sonic Instruments are used for removing plaque, stains and calculus. There are 2 types of ultrasonic units : a) Magnetostrictive : Vibrations of the tip are elliptical hence all the sides can be used. b) Piezo-electric: Pattern of vibration of the tip is linear : only 2 sides of the tip are active.