Amplitude

The amplitude of a periodic variable is a measure of its change over a single period (such as time or spatial period). There are various definitions of amplitude (see below), which are all functions of the magnitude of the difference between the variable's extreme values. In older texts the phase is sometimes called the amplitude.

Definitions of the term

Peak-to-peak amplitude

Peak-to-peak amplitude is the change between peak (highest amplitude value) and trough (lowest amplitude value, which can be negative). With appropriate circuitry, peak-to-peak amplitudes of electric oscillations can be measured by meters or by viewing the waveform on an oscilloscope. Peak-to-peak is a straightforward measurement on an oscilloscope, the peaks of the waveform being easily identified and measured against the graticule. This remains a common way of specifying amplitude, but sometimes other measures of amplitude are more appropriate.

Peak amplitude

In audio system measurements, telecommunications and other areas where the measurand is a signal that swings above and below a zero value but is not sinusoidal, peak amplitude is often used. This is the maximum absolute value of the signal.

Amplitude (political party)

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Amplitude is a Chilean center political party founded in January 2014. Although initially grouped centre-right independents that had no militancy in the parties of the Alliance, later then became defined as "liberal center" and associated with other movements outside the coallition.

History

On January 7, 2014, deputies Karla Rubilar, Pedro Browne and Joaquín Godoy Ibáñez, militants of National Renewal, decided to forego the party for ideological differences. Among the reasons given for leaving was the party refusal to support the closing of the Penal Cordillera (a special prison for military people condemned for human rights violations under the Pinochet dictatorship), the lack of party support on the civil unions project, and the position on economic and educational policies.

That same day presented a manifesto entitled "Amplitude", where traced the outline of a new political movement. These include the rejection of human rights violations committed during the dictatorship of Augusto Pinochet and support for political reforms, including the reform of the electoral system and the vote of Chileans abroad.

Amplitude (video game)

Amplitude is a music video game developed by Harmonix for the PlayStation 2. It is the sequel to the previous game, Frequency. The game was released in North America on March 24, 2003 and in Europe on September 26, 2003.

In Amplitude the player controls a beat blaster ship across a lane of six tracks, each track representing a musical instrument and containing note gems that the player shoots at in time with the music. The player earns points for accurate playing and increases their scoring multiplier by playing a series of flawless sequences; the player loses energy by missing too many notes and can end the song prematurely if they run out of energy. Compared to the original Frequency which used more electronica and trance music, Amplitude included additional pop rock songs in its soundtrack.

The game was a critical but not a financial success, and would lead Harmonix to become a major studio in the development of music games. In 2014, Harmonix successfully offered a Kickstarter campaign to raise over $840,000 in funds to build a new Amplitude game for PlayStation 3 and 4 consoles; the remake was released in January 2016.