The Collaborative International Dictionary of English v.0.48:
noisemaker \noisemaker\ n. Any device (such as a clapper or bell or horn) used to make a loud noise at a celebration. [WordNet 1.5]WordNet (r) 3.0 (2006):
noisemaker n 1: a device (such as a clapper or bell or horn) used to make a loud noise at a celebration