From Longman Dictionary of Contemporary Englishthe drum of somethingthe drum of somethingCa sound like the sound a drum makes the drum of the rain on the window → drum
Examples from the Corpus
the drum of something• Sharp, guttural cries accompanied the drum of hooves.• This could be Pat Buchanan, beating the drum of working-class Republicanism.• The master copy is then placed round the drum of the duplicator.• But such long-termism is out of step not only with the more immediate demands of industry, but the drum of government policy. 