There are very many normal human sounds that are not speech, including, but not limited to: laughter, crying, yelling/screaming/yelping (in surprise, pain, fear), groaning, moaning, yawning, sneezing, coughing, vomiting, singing, whistling.

What constitutes human speech? There are languages that have sounds that don’t exist in other languages (said as someone still trying to get a hold on rolling my Rs).

In any case, we should all learn some sign language. Seriously, it’s useful to be able to communicate silently or just visually (e.g. Across a noisy room), plus it makes life way more inclusive for Deaf people.

This is the first I’ve heard of it. Can you share your source, please? I want to see it myself whether it’s reputable before I form an opinion.