compression ratio
The term "compression ratio" is used in various fields, including automotive engineering, computing, and audio engineering, each with distinct meanings.
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Definition
C1Automotive Engineering
(technical)The ratio of the volume in a cylinder of an internal combustion engine before and after the compression stroke.
Example
- Higher compression ratios in engines typically lead to better efficiency and performance.
B2Computing
(technical)The ratio of the original size of data to its size after being compressed.
Example
- A compression ratio of 2:1 means the compressed data is half the size of the original data.
C1Audio Engineering
(technical)The ratio of the reduction in output level of an audio signal to the increase in input level above a set threshold.
Example
- A 4:1 compression ratio means that for every 4 dB increase in input above the threshold, the output will only increase by 1 dB.