### voice:

Different voice
* have different musical pitches
  - natural sounding ranges of pitch
+ Vietnamese alphabet, Letters of the alphabet, Vietnamese characters, Making the vowel sounds: Vietnam :: Alphabet :: Austro-Asiatic languages
  * Different voices have different musical pitches. If a speaker uses strong pitch changes, it will probably be for pronunciation.

Human voice
* are a good hindrance for almost all animals
  - instruments
* can also be seen as an instrument, air is brought into vibration by vocal chords.

Passive voice
* are voices.
* is something that is being done to the subject of the verb
  - the primary cause of boring manuals
* tends to conceal rather than reveal information.

Tenor
* are direction.
* are located in choirs
  - choruses
  - jazz bands
  - operas
  - male singers
  - meaning

### voice:

Voice recognition
* allows data input without the use of keyboards and mice.
* can increase typing speed and accuracy.
* depends on computers.
* enables users to control their computers through speech.
* has help people with motor impairments to be able to interact with computers.
* identifies the basic pattern in the way a person speaks.
* is another method of identification
  - viewed by some as the solution to handhelds' tiny keypads
* lets others control a computer by speech.
* major component of voice activation.

### voices:

Active voice
* are voices.
* is something the subject of the verb is doing.
* means engaging the subject of a sentence with an active verb.
* more natural way to construct sentences.

Void
* are books
  - empty regions of space, where there is no detectable matter
  - essentially incapable of transmitting structural stresses or nonradiative energy fields
* are located in space
  - universes
  - open spaces between soil particles filled with air, water, or a combination of both
* result from heating volatile compounds trapped inside the solder.
* tend to act as the nucleus for horizontal cracks.

Volatile compound
* Most volatile compounds play roles.
* Some volatile compounds are produced by bacteria
  - common bacteria
  - common soil bacteria
  - contribute to health problems
* Some volatile compounds destroy layers
  - ozone layers
  - inhibit growth
* include solvent.

### volatile oil:

Eucalyptus oil
* Most eucalyptus oil has aroma.
* is volatile oil
* vary in chemical composition.

Turpentine
* Most turpentine is produced as a by-product of the papermaking process.
* Much turpentine is derived from tall oil from the paper industry.
* flows from the pine and other cone-bearing trees.
* is volatile oil

### volcanic eruptions:

Plinian eruption
* Some Plinian eruptions are so powerful they can change the climate for years at a time.
  * have columns of gas and volcanic ash high into the stratosphere. There large amount of pumice into the atmosphere and very powerful gas blast eruptions.
* are volcanic eruptions.

### volcanoes:

Open triangle
* are volcanoes.
* is the summit of volcano.

### volcanos:

Active volcano
* Most active volcanoes have fumaroles where volcanic gases escape to the surface.
* are also responsible for some of the world's most fertile soils.
* are on smaller surrounding islands
  - the islands of Hawaii and Maui
  - present and earthquakes are frequent
  - very complex natural systems
  - volcanos
* can be inaccessible, temperamental, and even dangerous
  - go tens of thousands to hundreds of thousands of years between eruptions
* dominate the skyline in many parts of the Pacific Northwest.
* erupt constantly.
* exist, and the islands are subject to destructive earthquakes.
* occur only when the island is directly over the hot spot.
* pose many hazards to life and property.

### volcanos | active volcano:

White island
* White Island continues to emit minor amounts of steam and gases, but no ash.
* White Island is an active volcano
  - andescite volcano
  - one of the most interesting volcanoes in the world