I have contacted the IAHS Library to find out more information. I am awaiting a call back as to the brand and cost of the headphones which they lend. We do have large earphones for our multimedia materials, but they are for use on specific equipment.
We did look into the idea of lending headphones a couple of years ago, but the literature showed that sharing headphones was not a sanitary practice. We don't have the budget to hand out free earphones, and many people have their own mini earphones which are quite cheap.
I'll let you know what we decide.
Update: I investigated the headphone loan service being offered at IAHS and I am pleased to announce that as of this week (February 10, 2010) we have set up a pilot project to lend headphones from the circulation desk.
Answered by: Liz Bayley (Director, Health Sciences Library)