A couple of notes to also consider when presenting a depiction or description of pulsejets.
They do not spool like turbines. Everyone here knows who im thinking of. "dragster" whiiir whrrrrrriiiiiiiii, "im a jet"
With increase in throttle and power a pulsejet just gets louder at basically the same frequency. They do "bite in" a bit, and the frequency can vary a little depending on how extreme the throttle percent is although the shift is more a change in timbre. Getting to know these variations is called "an easy starting engine"
(in house joke)
Have a look at some videos to get the feel for them, even better, build your own, we can help.
It is a very distinctive sound that only varies between engines subtly. Small ones scream at a much higher frequency (probably obviously) although all "useful" (presuming thrust use) sized engines will be big, monstrous in fact, have a lower frequency and higher amplitude. A historical flight engine (valved) is the Argus which pushed the German V1 flying bomb. It had a thrust from 500 to 800lbs at a frequency of around 50Hz, which must have been absolutely gut wrenching.
When near a big engine and especially around the output, the sound is felt more than heard, and is literally mind numbing and organ damaging. It is an exhausting experience operating big engines for any length of time.
If you start getting into multiple engines, you get "beat frequency". This multiplies the above effects greatly. An awesome but sickening effect.
Welcome to the forum, we're a pretty friendly bunch mostly and you are not misusing anything unless you depict a PJ spooling!
We try not to be as touchy as some other forums that will lock threads for using any word not in direct relation to the subject (grumble grumble)
Let us know a bit more of what your doing. "valveless pulsejets play a fairly major role" sounds very interesting.
Rossco