Amulet of the Master Harper

Amulet of the Master Harper is an enchanted amulet which can only be used by thieves and bards. It provides a bonus to find and disarm traps and lockpicking of 20%, a bonus to armor class of -3 and complete immunity from the status effect silence. It appears in Baldur's Gate II: Throne of Bhaal. It can be gained if the Fire Elemental Prince in the temple of the Marching Mountains is killed.

In-game description
"This medallion is highly sought after by both thieves and bards, though for different reasons. In addition to providing powerful magical protection against physical attacks, the amulet increases the wearer's proficiency in several rogue skills. But even more valuable, from the bard's perspective, is the amulet's ability to grant the wearer immunity to all forms of silence."