In a huge amount of posts in talkbass over the years, people mistake a dead spot for a resonant fret (wolf tone). Or they just label a wolf tone , a deadnote. Well, is the fret dead (no sound or just a metallic plunk), or does the sustain disappear and is replaced with an octave harmonic (wolf tone)?
Wolf tones have been on string instruments for hundreds of years. The modern bass guitar is no exception. The location of it can change with the mass of the instrument. It's the frequency where the bass mass resonates to a frequency equal to or near the note played/pressed/fretted. This does not retract from the great workmanship or quality of basses, from either Fender, Music Man or others. It's just physics. We all deal with them. Ignorance can be bliss though. Beginners don't worry about them i guess.
You can get lucky and the resonating frequency of the bass lies between two note frequencies, so that it is almost unaudible. In this instance some will say, "My bass does not have them, because it's a superior instrument" but it's just less noticable, a stroke of luck, not of craftsmanship quality. Normally you get one really weak note, and the notes on each side of it is often marginally weaker han a normal note. Those surrounding frets are also harmonically resonant and their sound will move to the octave harmonic too, but over longer time so to speak, and with lower volume.
If you have a dead note aka "plunk plunk clack" and no tone rings at all, it's a fret issue. See your luthier.
Hope this helps someone