Here are several possible ways to participate:
Organize a soundwalk. What is a soundwalk?
Organize a performance event that explores soundscape and how we can listen to our sonic environment.
Participate introspectively by simply paying attention to your soundscape.
You can facilitate an educational event that relates to acoustic ecology, field recordings, or a similar topic.
The level of participation in 2010 was amazing. We would like to see if we could double or even triple the number of participants worldwide this time.