I’ve been thinking about stage monitoring and been talking to one of my DJ friends who was asking me about particular headphones. So I did a quick google and came up with this far from exhaustive list of resources.
Here are some companies:
http://www.etymotic.com/ – they sell in-ears plus you can get custom molds to go with them – wide range of products/prices
http://www.shure.com/americas/products/earphones-headphones/se-models/index.htm – they also sell in-ears and have a partnership with custom mold makers Sensaphonics
http://www.acscustom.com/au/index.php?option=com_content&view=article&id=30&Itemid=45 – high end
http://www.earmonitorsaustralia.com/index.htm – they will do molds for other in-ears and also sell complete units
Hearing is a critically under-appreciated sense. At least until you start to lose it. Another thing that I have been thinking about lately is how ambient noise in the everyday environment is quite damaging to productivity, sanity and well being. There is a lot of research coming out now about this.
Here are a few fascinating videos about this:
http://www.ted.com/talks/julian_treasure_shh_sound_health_in_8_steps.html
http://www.ted.com/talks/julian_treasure_the_4_ways_sound_affects_us.html
http://www.ted.com/talks/evelyn_glennie_shows_how_to_listen.html