class astropy.units.DecibelUnit(physical_unit=None, function_unit=None)[source]#

Bases: LogUnit

Logarithmic physical units expressed in dB.

physical_unitUnit or string

Unit that is encapsulated within the decibel function unit. If not given, dimensionless.

function_unitUnit or string

By default, this is dB, but this allows one to use an equivalent unit such as 2 dB.