harmonic distortion analyzer
11Sound reinforcement system — A sound reinforcement system is an arrangement of microphones, electronic signal processors, amplifiers, and loudspeakers that makes live or pre recorded sounds usually music or speech louder, or that distributes the sound to a larger or more… …
12Electricity meter — Typical North American domestic analog electricity meter …
13Sound synthesis — Basics of sound When any mechanical collision occurs, such as a fork being dropped, sound is produced. The energy from the collision is transferred through the air and other mediums, and if heard, into your ears. On a small scale, the collision… …
14Quartz crystal microbalance — A quartz crystal microbalance (QCM) measures a mass per unit area by measuring the change in frequency of a quartz crystal resonator. The resonance is disturbed by the addition or removal of a small mass due to oxide growth/decay or film… …
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