50 royalty free ringtones for seniors and hearing impaired

As we grow older, our earing diminishes.
Age affects high frequencies more than low. 
I need 50 custom polyphonic ringtones for seniors according to Psychoacoustics

Ringtones has to be created having elder people in mind: in particular they must follow guidance of limits of perception and frequencies to allow best chances to be heard by senior people. Growing old means hearing impairment: aging means hearing loss. In particular people are not able to hear some frequencies.
These 50 polyphonic ringtones will be put as free download on a free site: they have to be created to get the maximum chance to be heard by older people.
You will have username and password: you have to upload these 50 ringtones in suitable category inside Very enhanced in www.oldpeopleringtones.com.
You can create new category according to your music genre.

You can write details about the ringtone and you can add your copyright, links and contacts to every post. I'm open to the best solution for you to get the best price. Length of ringtones it's up to you. You can deliver them progressively or together: as you prefer but you have to upload in the web site in the category. Most important thing: i don't need original songs but I need to not have to pay some rights to an author. I mean: i need royalty free ringtones
Time to complete the project: take your time! 3 days, 30 days, 300 days...