Anything that has a particular use; such as, a tool, an object, or a plan, all of which are used to accomplish an objective or some purpose: Mark used his computer as a device for compiling his e-book.

The rescuers were using a special device to find people who were trapped in the collapsed building.

Lina's cool manner is her device to avoid having to talk to her colleagues at work.

Any of a wide variety of computer components that accept or produce sound: The audio device Jenny had on her computer was important for her to receive some very nice radio music!

1. A circuit that passes selected frequencies of alternating currents while weakening other frequencies.
2. A network that transmits alternating currents of desired frequencies while substantially attenuating all other frequencies.

1. Any component in a circuit configuration used explicitly to protect other circuit components form excessive heat or current.
2. A particular type of equipment used in electric power systems to detect abnormal conditions and to initiate appropriate corrective actions.

Instruments that consist of a magnet, generally rare earth (either samarium cobalt or neodymium iron boron), and an energizing coil.

The magnet is attached to the ossicular chain (any of certain small bones, as those of the middle ear), tympanic membrane, or the inner ear (round window or fenestra).

A fluctuating magnetic field is generated when the coil is energized by a signal, which corresponds to an acoustic input and this magnetic field causes the magnet to vibrate.

The vibrating magnet, in turn, causes movement of either the ossicular chain or the cochlear fluids directly.

The force generated is inversely proportional to the square of the distance between the coil and magnet (e.g., doubling the distance between the magnet and coil results in an output of one-fourth the force); therefore, these two components must be maintained in close proximity to one another to realize an efficient system.

A mechanical instrument which is operated by electricity.

1. An instrument whose operation involves the motion of electrical charge carriers in a gas, semiconductor, or vacuum.
2. A device or tool in which conduction is principally by electrons moving through a vacuum, gas, or semiconductor; such as, in a crystal diode, electron tube, transistor, or selenium rectifier.

1. A unit of equipment with circuits containing electron tubes, transistors, integrated circuits, or other devices that perform a function.
2. An instrument in which conduction is principally by the movement of electrons through a vacuum, gas, or semiconductor.
3. An electronic tube or valve, transistor, or other semiconductor tool; excluding inductors, capacitors, resistors and similar components.

1. An instrument for monitoring intravenous infusions.

The device may have an alarm in case the flow is restricted because of an occlusion of the line which will result in an alarm that will go off when a preset pressure limit is determined.

Most electronic infusion devices are equipped to stop the flow of the infused liquid if an accidental free-flow occurs.

2. An automated system of introducing a fluid other than blood into a vein.

The device may have programmable settings that control the amount of fluid to be infused, rate, low-volume notification level, and a keep-vein-open rate.

Some electronic infusion devices have titration modes that allow a change in the delivery rate without interrupting fluid flow. They also allow delivery in milliliters per hour.

The term titration is the process, operation, or method of determining the concentration of a substance in a solution to which the addition of a reagent having a known concentration is made in carefully measured amounts until a reaction of definite and known proportion is completed, as shown by a color change or by electrical measurement, and then calculating the unknown concentration.

1. An instrument that picks up sound waves from an essentially private conversation and reproduces them in a form, generally on magnetic tape, that then can be used as evidence.
2. A device used to capture the sound waves of conversations originating in an supposedly private setting in a form, usually as a magnetic tape recording, which can be used against the target by anyone with negative intentions.

A field programmable logic device with transistor rather than fuse links for controlling the signal paths in its fixed array of logic blocks and connections.

A short rhyme, phrase, or other mental technique for making information easier to memorize: The mnemonic device that Bernhard's children used for learning the alphabet was to sing the song of the ABCs!

In electronics, a tool in which a voltage moves electrical charges through a circuit: The peristaltic charge-coupled device is a high-speed charge-transfer circuit which functions in much the same way as the contractions and dilations, or expansions, that take place in the body's digestive tract which moves food through the stomach.

A solid-state device that converts light directly into electricity, with voltage-current characteristics that are a function of th characteristics that are a function of the characteristics of the light source and the design and materials of the device.

These devices are made of various semiconductor materials including silicon, cadmium sulfide, cadmium telluride, and gallium arsenide, in single crystalline, polycrystalline, or amorphous forms.

In robotics, a device with a programmable memory that can store data for positioning and sequencing the movements of a robot.