# What is the amplitude ?

process by which a change in a variable, can be reflected in different ways.Consider what is the amplitude.Amplitude - this is the highest level of a certain amount of displacement, which appears during the fluctuations of the wave.It is expressed by a non-negative numerical value and recorded in units that depend on the kinds of waves.

## Measuring amplitude

following are the units of measurement of different amplitudes:

- Fluctuations observed body or vibration waves related to the spring shall be taken as the distance.They are fixed in units adopted for measuring length.
- sound wave or other audio signals are calculated as the air pressure or the degree of bias on his balance.The value of the log recorded in decibels.
- Change radiation field strength is equal to that caused it.Golf can be not only magnetic, but electrical

form of amplitude changes name envelope wave.

## Species amplitudes

amplitude is called constant if its value is unchanged and is independent of the flow of time and space location.Waves that it creates, named undamped.

are the following varieties of amplitudes:

- Peak, which is a deviation from the set value of the observed waves.This includes species such amplitude as the sine and rectangular.
- amplitude-magnitude indicates a discrepancy between the two peaks, one of which is positive, and the second - negative.
- RMS is calculated as the square root extracted from the square of the deviation of the amplitude graph.The change is recorded in the mean time and established exclusively for asymmetric waves.RMS amplitude for calculating the characteristics of the pulses propagating in the same direction, as well as complex waves and non-repeating signals, one of which is noise.Power that is transferred to the wave is always in proportion to the square of the rms amplitude and never depends on the peak values.

Now you know what is amplitude and how it is measured.To properly calculate its value, please see How to find the amplitude.