What exactly is a complex acoustic pressure?

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Complex acoustic pressure is represented as a combination of magnitude and phase, typically expressed in the form of magnitude plus an imaginary component involving the phase value. The magnitude is measured in decibels (dB), while the phase is usually in degrees or radians. There is no need to change the units when combining these two components, as they represent different aspects of the same phenomenon. Understanding this relationship is crucial for accurately interpreting measurements from an impedance tube. Properly representing complex acoustic pressure aids in analyzing sound waves and their interactions.
IrfRaz
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I have an impedance tube and it gives me the magnitude (dB) and phase (phase) of a signaa.
So does that mean the complex pressure at that point is simply the [Magnitude] +i[Phase Value]?
Does I need to change the units at all?
 
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