tapping

1. The sound of light blow or knock (synset 107411258)
   "he heard the tapping of the man's cane"
   is a type of: sound - the sudden occurrence of an audible event
   subtypes: rat-a-tat, rat-a-tat-tat, rat-tat - a series of short sharp taps (as made by strokes on a drum or knocks on a door)

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