ILdB

ILdB is an acronym that is not tied to a single, universally standardized quantity. In technical documentation, forums, or vendor manuals it may appear as shorthand for different concepts, with the precise meaning defined by the context. Common interpretations include input level expressed in decibels (input level in dB) or an integrated level measured over a period (integrated level in decibels). In audio work, ILdB is rarely used in formal standards; more widely adopted metrics include dBFS for digital full-scale levels and LUFS for loudness. If ILdB is used, the documentation should specify how the value is calculated, the reference, and the time window.

In radio frequency and electronics contexts, ILdB can be encountered as an abbreviation related to signal levels, such as a notation for input level in dB relative to a reference, or occasionally for an interference level in decibels. Because ILdB is not standardized, the same acronym may mean different things across devices and disciplines. The absence of a universal definition means readers should rely on the exact wording in the source material and, when in doubt, seek clarification from the author or manufacturer.

See also: decibel, dBFS, LUFS, signal level, input level.