Abstract: An ink jet droplet generator is described, including a nozzle plate bonded to a carrier. A tuned piezo crystal and metal structure projects into an ink cavity and is mounted on a print head structure. The nozzle carrier is separated by a spacer from the print head structure and seals are provided to seal the cavity. A pillar is provided with a height slightly greater than that of the spacer between the print head structure and the nozzle carrier. The spacer is isolated from the print head structure, pillar and nozzle carrier by seals and O-ring which surrounds the pillar. In another embodiment, layers of acoustically absorbent material are provided between the spacer and each of the print head structure and nozzle element.