### device | muffler:

Shock absorber
* are a very important safety feature in a car
  - an important part of vehicle suspension systems
  - automotive products
  - dampers
  - part of suspensions
* can be very simple or very complex pieces of machinery.
* cushion road vibration and bumps.
* distribute the weight of the vehicle.
* protect the suspension system, tires, and the life of vehicle.
* reduce fatigue of wrist
  - shock caused by vehicle motion
* work in two directions and are critical as working companions to the springs.

### device:

Musical instrument
* All musical instruments create sound by means of vibration
  - have their own personality and character
  - make a sound under the control of a musician
* Many musical instruments are peculiar to India
  - rely on the reverberation of air to create sound
* Most musical instruments are difficult to play well, requiring years of study and practice
  - have resonators
* Most musical instruments produce a complex set of harmonically related overtones or partials
  - sounds with major thirds in their overtone structure
* Musical Instruments Listen to the sounds of the musical instruments used to accompany capoeira
  - Making music is good for the hands, the mind and the soul
* Some musical instruments make only one note
  - produce frequencies higher than the human ear can hear
* are devices.
* are located in bands
  - cabinets
  - cases
  - concert halls
  - movies
  - music stores
  - orchestras
  - rock bands
  - part of the value-added forestry sector
  - sensitive and readily get out of tune
  - some of the most sensitive real-time interactive tools made by humans
* are used for music
  - usually handmade
  - very expensive
* become puppets, or are played by puppets.
* contribute to the social well-being of cultures.
* create sounds that can be varied in pitch and volume
  - vibrations and vocal cords set an air column into vibration
* give off harmonics in even orders.
* have string.
* produce different harmonics
  - sound in various ways
  - their selected sounds in the same manner
* reproduce music.
* used are maddalam, elathalam and chengila.
+ Mozambique, Culture, Arts: Portuguese-speaking countries
  * The music of Mozambique can be for many purposes. These can be religious or for traditional ceremonies. Musical instruments are usually handmade. The marimba is a popular instrument with the Chopi of the south central coast. They are famous for their musical skill and dance.
+ Resonator, Music: Musical instrument construction :: Physics
  * Most musical instruments have resonators. They are the parts which makes the sound louder. A vibraphone, for example, has long tubes underneath the keys.

### device | musical instrument:

Calliope
* are musical instruments
  - used as outdoors instruments, and many have been built on wheeled platforms
* usually have very loud and clean sound.

Electronic instrument
* are available as low-price consumer products
* extend the central nervous system.
* measure water temperature, salinity, pressure and other things.

Music box
* are films
  - television stations
* have cranks.

### device | musical instrument:

Percussion instrument
* Many percussion instruments produce their own resonant frequencies.
* Most percussion instruments fall into the categories of idiophones and aerophones.
* Some percussion instruments are clarinets
  - consist of poles. * can play tunes
* are acoustic instruments
  - the most popular instrument in African societies
* are used for beating
  - hitting
  - jazz
  - striking
* form a highly varied family.
* make noise by contact and can be compared to the drums
  - the world go round

Piano accordion
* are rare, melodeons are much more common.
* is wind