No, I can't, because that formula is nonsense.  Furthermore, referring to the first paragraph of you link:

- Amplitude is *not* the measure of change over a single period.
- The maximum height *is* the amplitude, assuming the wave is a physical displacement wave.  But there are many waves that are not:  electromagnetic waves, for example.
-  Amplitude *may* be expressed in dB, but usually isn't, and if it is, one must provide the reference amplitude.

The formula given is wrong.  It is not even dimensionally correct. It equates meters with meters/Hz.

Example 2. isn't even wrong.  dB is dimensionless, while example 2 has it with units meters/Hz. 

Take that web site off of your bookmarks.