### device | mechanism | wheel:

Water wheel
* Some water wheels convert energy
  - make power
* provide mechanical energy, while hydraulic turbines are used to generate electricity.

Waterwheel
* Most waterwheels drive generators.
* are the oldest type of hydropower system
  - useful for generating mechanical energy, such as sawing wood and grinding grain
  - widespread in Europe
  - mills
* includes sections.

Wheel alignment
* controls the distribution of vehicle load across the tire's footprint.
* is the proper adjustment of ALL the interrelated suspension angles.

Wiper
* Some wipers also are susceptible to damage from ultraviolet rays, pollutants and chemicals.
* Some wipers are part of automobiles
  - cars
  - motorbikes
* are a hybrid crossing white bass with striped bass
  - active in the northern coves
  - contact
  - part of selectors
  - workers
* blades on mix tanks Use wiper blades to physically wipe down sides of mix tanks.
* includes sections.
* is contact

Memory device
* Most memory devices store and retrieve data by addressing specific memory locations.
* are devices.

### device | microart | film:

Microfiche
* are exposure
  - microfilm
* are small flat sheets of photographic film
  - plastic cards
* flat sheet of film.
* is in negative polarity
* transparent sheet and microfilm roll of film on a reel.

### device:

Microphone
* All microphones are transducers, converting one form of energy to another.
* Most microphones change sound.
* Some microphones convert energy
  - use a coil rather than a single wire
* are in the tentacles
  - input devices
* are located in concert halls
  - conferences
  - demonstrations
  - stages
  - products
  - subject to an inordinate amount of abuse, especially in live music
  - typical audio input devices
  - used for amplification
* belong to the transducer family, devices for converting one form of energy to another.
* can capture sounds from the air which is good for sound effects or voices
  - make a big difference in quality of sound
* convert sound into electrical energy that can be amplified and shaped
  - waves into electrical voltages
* define the quality and character of every voice and instrument they record.
* hang from the ceiling and pick up sound.
* have a small membrane that responds to pressure variations by vibrating
  - limiting circuitry that shuts down when a noise impulse is too large
* is connected to an audio or video recording device.
* known as condenser microphones require a power source in order to operate.
* make big screeching noises.
* pick up and amplify ambient sounds in true stereo
  - the noise produced and generate a graph plotting decibels against time
* suppress environmental noise to aid in two-way communication.
* tend to produce very small signal levels.
* vary in shape and size and by the type of sound they are designed to pickup.
* vary widely in size, shape, sound quality, acoustic characteristics and other details
  - their shock sensitivity

### device | microphone:

Condenser microphone
* Some condenser microphones require a battery, which is generally in the hand set.
* are microphones.
* differ in almost every way from dynamic microphones.
* have impedances in the thousands.
* require a DC voltage in order to operate
  - power source for their internal electronics

Directional microphone
* are microphones.
* receive sound more efficiently from one direction than from others.

Electret microphone
* are the most popular for aviation use.
* needs some power to operate.

Omnidirectional microphone
* are the simplest to design, build and understand.
* hear or pick up sound from all directions equally.
* receive sound equally well from all directions.

Ribbon microphone
* have a highly directional response.
* uses a small ribbon suspended in a magnetic field.

Vocal microphone
* Most vocal microphones are cardioid, which means that they have minimum pickup at the rear.
* require phantom power.