Headroom (audio Signal Processing)
In digital and analog audio, headroom is the amount by which the signal-handling capabilities of an audio system exceed a designated level known as Permitted Maximum Level (PML). Headroom can be thought of as a safety zone allowing transient audio peaks to exceed the PML without exceeding the signal capabilities of an audio system (digital clipping, for example). Various standards bodies recommend various levels as Permitted Maximum Level.
Read more about Headroom (audio Signal Processing): Headroom in Digital Audio, Headroom in Analog Audio, Alignment Level
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