Typically, and sadly, many first time Angel spawns are on filter intake tubes which makes them harder to deal with as the tank needs the filter to keep it clean. Many of these spawns are also unsuccessful because of this reason. I have a theory that because it's on the intake tubes, the milt doesn't have a chance to fertilize the eggs before being swept away but this is just my theory as first time spawners also don't have a good success rate no matter what filters you use. But some do, and that's why I recommend artificially hatching the eggs to see if they were ever fertilized or if the pair is even fertile at all.
Getting back to your questions: No, the vibrations shouldn't be an issue and unless you have other filtration, you shouldn't turn off the filter.
If your goal is not to breed the fish, I'd just let nature take it's course as other fish in the tank will try ( and usually eventually succeed) to eat the eggs which happen to be a very good food source for your fish. If the eggs all die, the parents will eat them as well. FYI: If the eggs turn white, they are dead.
One of the nice things about Angelfish is that they are usually prolific breeders so if the last spawn was unsuccessful, chances are you will have another chance at getting it right in about 10-14 days for new breeders. If your goal is to raise some Angelfish fry, I strongly suggest you put the pair in a tank by themselves with just a sponge filter, some artificial plants with smaller leaves ( so the fish don't spawn on them) and a breeding site such as Slate, Tile, Clay Pot or PVC pipe for example. If you would like the parents to try raising the fry, I would use at least a 20gal long tank or a 29 gal. If you are going to remove the eggs and hatch them yourself, the spawning tank can be as small as a 10 gal tank depending on the size of the breeding pair. Either way, an air driven sponge filter is the best way I have found to produce more fry successfully. If you would like more information on breeding Angels, there is a thread here in the breeding forum titled " Wigglers at last!!!" which is all about breeding and raising Angelfish by pro & hobbyist breeders. Just about everything you need to know was discussed on that thread so it should help you out.
A word of caution, if your goal is not to breed the pair, I would still remove them from your tank, if it is a community tank, as breeding pairs of Angels can become extremely aggressive towards their tank mates when spawning time approaches. They can and have killed tank mates trying to protect their eggs. These are not usually one of the gentler Cichlid species that can breed in a community tank.
Hope this helps.