APPENDIX ADecibel Units of Measure

These are the most typically used decibel suffixes and other loudness units in audio engineering:

dB Decibels A weighting, which usually refers to dBSPL A weighting, although it could mean dBFS A weighting; it requires another modifier for specific descriptions (e.g., dBSPL A).

dBB Decibels B weighting, which usually refers to dBSPL B weighting, although it could mean dBFS B weighting; it requires another modifier for specific descriptions (e.g., dBSPL B).

dBC Decibels C weighting, which usually refers to dBSPL C weighting, although it could mean dBFS C weighting; it requires another modifier for specific descriptions (e.g. dBSPL C).

dBFS Decibels relating to full scale, a description of signal intensity in ...

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