There are numerous things you can do to get an excellent slide noise: Establish your guitar with much heavier strings, use an open tuning, try various type of slides, dampen the strings, and find out to appropriately intonate. Getting a great sound is typically as much a function of appropriate setup as it is strategy. Some guitar players like to raise the action on an inexpensive guitar and put on heavy-gauge strings– guitars with low action and light-gauge strings make it tough to get a good tone because the additional weight of the slide can crash the fretboard and produce undesirable sounds.
Examine out the full lesson here: https://acousticguitar.com/video-lesson-simple-acoustic-blues-tips-that-can-improve-your-bottleneck-slide-technique/