Bajoran gong

From Memory Alpha, the free Star Trek reference

The Bajoran gong is a small percussive instrument that plays a role during Bajoran births.

For Bajoran women, it is important to be relaxed during the birthing process, so her relatives play different instruments in a repeating rhythm to provide a relaxing atmosphere. During Kirayoshi O'Brien's birth, his father Miles O'Brien played the Bajoran gong; he had trouble keeping up the rhythm, however. (DS9: "The Begotten")

Bajorans also employ large gongs that are used during the Bajoran Gratitude Festival. (DS9: "Fascination")