### device:

Gong
* are typically foot or cord operated on streetcar and other trolley equipment.
* musical instrument

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Guitar
* All guitars produce sound through the mechanical vibration of strings.
* Most guitars only have six strings.
* Some guitars have piezo pickups, in addition to or instead of magnetic pickups
  - piezoelectric pickup in addition to electromagnetic pickups
* are capable of work of art
  - chordophones
  - instruments
* are located in bands
  - cases
  - concerts
  - rock bands
  - stores
  - toy stores
  - lutes
  - made and sold in many parts of the world by many companies
* are made of string
  - wood
  - stringed instruments
  - used as rhythm instruments , lead instruments , and sometimes both
* are used for music
  - teachs
  - tuning
* can vary both in the number of strings they have.
* cause a desire to play
* have string.
* includes bases
  - sections
  - sound holes
* often have an adjustable reinforcement, called a truss rod, to control neck bending.
* spread and became a common musical instrument all over Europe.
* tend to dominate rock music, and guitars are tuned to favor the keys containing sharps.
* typically have six strings.
+ Electric guitar
  * Guitars are made and sold in many parts of the world by many companies. They can be hand made or factory made. Some companies that make electric guitars are Fender, Gibson, and Ibanez.
+ Guitar chord
  * Most guitars only have six strings. This means that for the very largest of chord-voicings it is often necessary to not use one or more tones from the chord. The layout of notes on the fretboard sometimes means that the notes in a chord are not played in tonal order, or make possible a chord that is composed of more than one note of the same pitch. Many chords can be played with the same notes in more than one place on the fretboard.
  * Guitars can vary both in the number of strings they have. They can also be tuned differently.
+ Guitar, Different kinds of guitars
  * Some guitars combine the hollow acoustic body with amplified sound. Bass guitars are designed to make a low bass rhythm
  - Guitar music
  * Guitars are used in many different genres of music, such as traditional, regional, and folk to modern punk, rock, metal or pop. Guitars are used as rhythm instruments, lead instruments, and sometimes both

### device | guitar:

Acoustic guitar
* are acoustic instruments
  - common, as are computer-generated sounds
* are located in bands
  - closets
  - houses
  - studios
* are used for folk music
  - playing
* come in two types.
* transmit the vibration of the string to the soundboard via the saddle and bridge.

Electric guitar
* Most electric guitars have bolt-on necks and can easily be fixed by a guitar technician
  - provide individual string length adjustment for setting intonation
* are guitars.
* come in infinate varieties.
* consist of neck.
* use pickups to convert motion energy into electrical energy.

Modern guitar
* come in four main types.
  * Modern guitars come in four main types. The classical guitar is used for classical music. The term acoustic guitar is generally used for a guitar used for popular music, even though a classical guitar is also an acoustic instrument. There are many other different types of acoustic guitars from different parts of the world.

Ukulele
* are part of the guitar family of instruments.
* normally have nylon strings or gut strings
  * It is also called the 'uke' for short. Ukuleles are part of the guitar family of instruments. Ukuleles normally have nylon strings or gut strings

Handheld device
* Most handheld devices emit loud click sound
* Some handheld devices measure wind.