videos in AudioSet
A list of about a million ten-second YouTube clips, each labelled with the sounds in it, that Google published in 2017. Labs use it to train and test general audio and music models.
Including Sangean RCR-22 AM/FM Atomic Clock Radio, Westclox Big Ben 70010 Extra Loud Twin Bell Battery Operated Alarm Clock, Seiko QHE114KLH and QHE114SLH Alarm Clock with Stop Watch and Countdown Timer / Non-Ticking