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A microphone designed to pick up mechanical vibrations directly and convert them into corresponding electric currents or voltages.

Related Terms

SEEBECK EFFECT

When two different adjacent metals are heated, an electric current is generated between the metals.

DIELECTRIC STRENGTH

A measure of the ability of an insulating material to withstand electric stress (voltage) without failure. Fluids with high dielectric strength (usually expressed in volts or kilovolts) are good electrical insulators. (ASTM Designation D 877.)

AMMETER

An instrument for measuring the magnitude of electric current flow.

ARC

A flash, caused by an electric current ionizing a gas or vapor.

COMPRESSOR

A device which converts mechanical force and motion into pneumatic flow power.

ASME PART PEB SECTION I

Requirements for electric boilers.

ALTERNATOR

A device which converts mechanical energy, into alternating current.

BRINELLING

Permanent deformation of the bearing surfaces where the rollers (or balls) contact the races. Brinelling results from excessive load or impact on stationary bearings. It is a form of mechanical damage in which metal is displaced or upset without attrition.

PUMP

A device which converts mechanical force and motion into hydraulic fluid power.

FILTRATION

The physical or mechanical process of separating insoluble particulate matter from a fluid, such as air or liquid, by passing the fluid through a filter medium that will not allow the particulates to pass through it.
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