Team Formation for Administrative Volunteering

We seek an individual to recruit volunteers for us - MUST BE IN USA location. You will be given ear buds to hand out. We want to recruit 500 individuals over a 2 month time frame. You will find people to volunteer by giving them free ear buds. The location doesn't matter, though a high traffic spot like on a large college campus or busy train station / airport might be beneficial. You will instruct the volunteer to download an app to their phone, then pair their new ear buds to the phone. The ear buds will be placed on the ears for 2 minutes. No sound will be played - we are using the ear buds to record the volunteer's heartbeat. No names are required. The app will automatedly name the resulting file and send off to our server. That's it; the volunteer keeps the ear buds and you find the next volunteer. You will be paid on a per recording basis (one recording per volunteer).