SoundMuffler++

A block placed in the world applies sound rules to the area around it. Right-clicking the block opens a GUI where each rule picks which sounds to act on and the percentage by which their volume changes, with wildcards supported, so a rule can lower mob sounds to half volume or silence them entirely. Rules are listed and scrolled through, and a rule is removed with the X button. A search screen opened from a magnifying glass button helps find a sound by splitting its category from its name, so cryptic sound names are easier to locate.

Because a placed block stays in one spot, the mod also adds earplugs that carry the same kind of control onto the player. Holding the item and shift-right-clicking opens a configuration GUI with the same settings, and equipping the earplugs in a helmet armor slot applies the effect. The mod runs on Forge for 1.10.2 and is open source under the MIT License, with files for 1.10 – 1.10.2, and it needs to be installed on both the client and the server.