Deizibel

Deizibel is a term that appears in fiction and some informal discussions as a unit of acoustic level. It is not an established unit in physics or metrology and has no official definition in SI or IEC standards. The name is a neologism, and there is no single accepted meaning; different authors or communities have offered multiple, incompatible definitions.

In most uses, deizibel is described as a logarithmic scale for sound intensity or pressure, similar in spirit to the decibel, but with different reference values or scaling. Some writers treat it as a fictional successor to the decibel for larger dynamic ranges; others simply reuse the term as a stylistic alternative without specifying a precise numeric relation. Because there is no universal standard, the value of a deizibel is inherently context-dependent.

Relation to decibel and metrology: The decibel is a well-defined unit derived from the bel with a specific reference level for sound power or pressure. The deizibel lacks such universal references, and its use can lead to confusion if it is mixed with real measurements. For this reason, standard acoustics and metrology do not recognize deizibel as a legitimate unit for real-world measurement.

Usage notes: When encountering the term, readers should check the source for a defined meaning or a numerical relation within that context. Absent a explicit definition, treating the deizibel as a fictional or context-specific construct is appropriate.

See also: Decibel, Bel, Loudness, Psychoacoustics, Metrology.