Some bows are loud and remain loud no matter what you do; especially some short ATA bows.

In addition to what has been suggested so far, two other things should be considered.

All bows perform best and are quieter when the draw weight is set at, or as close to, the max peak weight of the bow. When you dial down the draw weight, some bows become louder, and some bows become very loud. On some bows, the more you have to dial down the worse it (post-shot noise) becomes.

If you are shooting a lightweight shaft setup, the shaft does not absorb as much post-shot shock as a heavier shaft and can result in bow and/or string noise.

Also, loose accessories can cause noise. It is not uncommon for some shooters to mistakenly believe the noise is coming from the bow itself and/or string.

Last, something that can cause a bow to become loud and produce loud string noise, even a “slapping” sound, and is not considered by many shooters, is cam/wheel bushing wear or bent or worn cam/wheel axles. Older bows or bows shot often, especially high performance bows, will often have bad bushings and/or bent or worn axles.