دامنه دینامیک – Dynamic Range

Dynamic range (abbreviated DR, DNR,[1] or DYR[2]) is the ratio between the largest and smallest values that a certain quantity can assume.

It is often used in the context of signals, like sound and light.

It is measured either as a ratio or as a base-10 (decibel) or base-2 (doublings, bits or stops) logarithmic value of the difference between

the smallest and largest signal values.

[3]

Electronically reproduced audio and video is often processed to fit the original material with a wide dynamic range into a narrower recorded dynamic range

that can more easily be stored and reproduced

this processing is called dynamic range compression.

Audio engineers use dynamic range to describe the ratio of the amplitude of the loudest possible undistorted signal to the noise floor,

say of a microphone or loudspeaker Dynamic range is therefore the signal-to-noise ratio (SNR) for the case where the signal is the loudest possible for the system.

For example,
if the ceiling of a device is 5 V (rms) and the noise floor is 10 µV (rms) then the dynamic range is 500000:1, or 114 dB: