Yvette Brazier, ‘It’s not what you say, it’s the way that you say it’, http://www.medicalnewstoday.com/articles/305452.php, MNT (23 January 2016).

Sounds of emotion more readily understood

We (…) interpret emotions much faster than words, within a tenth of a second. (…) Sounds of happiness appear to be picked up more quickly than those of anger or sadness.