This was an interesting challenge. The idea was to create a poster using a random list of a dozen different phone numbers, which would be used to generate visual imagery for the poster. For example, the digits 0-9 could each be assigned a colour, size, typeface, character, or degree of transparency. The goal of the poster is to suggest an auditory experience, as well as ideas of social and technological interaction.
The idea I had was to assign each number a colour. Then I grouped horizontal lines depicting each phone number and made them into zig zag lines to represent audio waves and this is what developed.