In a study done in the mid 1960’s only 4/10 could identify this sound. Now close to 90% can. What is it?

A: Their own voice.

Back then, a majority of people didn’t like the sound of their own voice and still don’t. Not because of the way it sounds but because they’re surprised the way it sounds. It is different hearing our voice recorded rather than as we speak

This weekend's question is

Over 80% of those surveyed say that this is their favourite and most used tool at home and outside the home. It is also very handy to take on their travels. What is it?