The Sunday Cat has a great treat for you!

It’s Smokey, a VERY LOUD CAT.  The purrs can read 92 decibels, approximately the noise level of a lawnmower.

And for a demonstration:

 

For discussions in the media, you can go here and also learn about a shrimp who is even louder.  Or here you can get quite a bit about Smokey actually at home.