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Decibels scale usefulness3/31/2024 Remember we said that each decibel has a point of comparing reference? Here we are going to see what's that point to each one of the decibels. What's the unity of each one of the decibels? A value in decibel is always translatable into a real value in the unit you are comparing it with. The only thing they have in common is that they are all comparing values with their respective units of reference. dBw: Power amplifiers (dBw or dBu), output attenuators on power amplifiers.Īll those types of decibel are different from each other, because they are representing different units.dBFS: Recording level of the audio interface DAW channel volume.dBVU : Pointer display of your analog or external peripheral equipment.Highly used in calculation, due to the 1V reference. dBv: Line level of semi-professional or vintage equipment.dBu: Line level of professional equipment, fader level in a mixing board, potentiometer of some power amplifiers.dBSPL: Charts comparing volume in different situations of our daily life decibel meters, recomendation of mixing volume levels car audio championships.But here is a list of where decibels are easy to find: We will explain further on what each type of dB really is. The different types, what is used to compare and the unit used to measure that: If you have no idea what's going on above, stay calm! Let's move on to a deeper explanation about what those affirmations mean exactly. Any value of decibel is equivalent to a REAL value in the unit that the dB is comparing it with.If we say something has X decibels, we are already comparing two things - in this case the actual number with the unit of reference of the scale we are using. When we talk about dB, we are talking in comparison. All kinds of decibels have their own unit of reference.The dB will always be comparing something to a unit of reference. and what defines that is what's written after dB. It has to be applied to things like tension, voltage, sound pressure, etc. Meaning that this unit alone doesn't represent anything. There is more than one kind of decibel. In fact, there's a bunch.This is a brief list of things you should keep in mind about decibel: That way, more than just explaining the subject, you'll end up with more skills to record and mix with better results. Today we are going to understand its different types and the practical use of it. But because in audio we measure in smaller scales, the "deci" was adopted for practical reasons. And what not many people know is that a decibel is, in fact, the tenth part of a Bel (that's why "deci"), a unit of measurement created by Bell Labs, telephony company owned by Graham Bell, to measure loss in transmission lines. Even then, very few people understand effectively it importance. If you have ever discussed any audio theory, this certainly was involved - either you acknowledged it or not.
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