I have a copy of crowley 'vibrating' those words of power; sounds like a thin emaciated wail! I'd like to hear Israel's method.
If you totally exhaust yourself with one vibration, how are you going to do the rest ... Crowley was being poetic.
Do you want the vibration or a successfull operation?
For vibration , ( if you are trying to achieve this bit - sorry I found the original question a little vague for me) in different parts of your body, forget the ritual and play with it, hold your hand on different parts of your body and go through a range of sounds and intonations until you can feel a vibration in that part of your body.
Im not talking about just 'buzzing' the last letter of the word (eg not Ommmmmmmmmmmm but Aaaaahhhhhuuuummmmmm) and you will find the vibration changing, resonating and going back and forth. Some say it is not the vibration of the letter but the change IN vibration from one sound to the other - digital versus analouge .., or modulation.
I learnt that then I made paintings of the words in hebrew flaming letters and pasted them on each wall of the temple or working space.
I would do a receptive posture, LOOK at the word, vissualise it, breathe in and breath the word in, then breathe out and breath the letters of fire out (as Israel reccommends) with expressive posture (enterer) through the pentagram ... after a while you can get rid of the cards.
Crowley gives some advice that can lead to a mess, he says to breathe the breathe out through the nose while vibrating the word. I have seen and heard 'senior' magicians sound rediculous doing this as they have interpreted that the vibration and sound should come out with the breath leading to a ritual that sounds like the person is half way through a sinusectomy
Open the throat and the nasal passage, let as much air as needed via the mouth to make the vibration and open the nasal passage to release the air at the same time.
OR . get a good Dum-tek or darrumbucca (sic!) ie. one of those modern tight plastic skinned Egyptian drum, or a vgood tamborine. hold flat, sprinkle something light and grainy and fine on the surface, practice your vibration towards the drum skin and watch the changing patterns that form (you need a light flexible tight skin and a resonant drum ... you could probaly knock up something with a tube and ballon skin.)
There is a lot more of course but ....