See also:

https://www.reddit.com/r/webdev/comments/2wnrfn/best_way_to_play_sound_on_mouse_over/

https://www.sitepoint.com/community/t/play-sound-on-hover-or-click-diffferent-audio-for-different-images/99391

https://www.webdesignerforum.co.uk/topic/72802-java-script-for-play-sound-mouseover-stop-play-sound-mouseout/