Create a new img tag and add a is="img-singing" attribute and a attribute sound="sound/forest.mp3". The sound will be heard while the image is visible on the screen.
<img src="img/forest.jpg" alt="Forest" id="forest-img" sound="sound/forest.mp3" is="img-singing">
For this to work in browser which don't support webcomponents yet, you have to include the polyfill from http://webcomponents.org/
Used demo images and background noise
Background noise is from freesound (not all of these are used at the moment) licensed under the Attribution License. Some of the sound is cut and compressed for usage on the web.
Waves on a sandy beach - juskiddink http://www.freesound.org/people/juskiddink/sounds/194868/
natural_wind - MikaF http://www.freesound.org/people/MikaF/sounds/109976/
Morning in the countryside - inchadney http://www.freesound.org/people/inchadney/sounds/56611/
rbh thunder storm - RHumphries http://www.freesound.org/people/RHumphries/sounds/2523/
Bonfire -juskiddink http://www.freesound.org/people/juskiddink/sounds/65795/
stream2.wav mystiscool http://www.freesound.org/people/mystiscool/sounds/7138/