Go to this website and click the red button. Have your sound up enough to hear. (This is totally safe for work and might even be helpful during a meeting.) You can select from a couple dozen different sounds if the default isn’t quite what you need.
And the default noise made me think of a really silly joke to start the week on a good note:
Q: What do you get when you throw two bass drums and a cymbal down a well?
A: “Da-BOMP-shhhhhh!!!”