You can sign-up for free and start filing noise complaints immediately to help make your voice heard over the roar and to help your community seek some relief. You can file up to 30 complaints each month with a free account.
But if you live under one of the new NextGen flight paths and the noise is really impacting your peace and quiet, you should consider subscribing to an unlimited, paid account and also getting an Airnoise button. You can file a complaint in one second with the button, and it will last for about 2,000 clicks.
All paid Airnoise accounts come with a free 30-day trial so you can try the service to see if it works for you. If you upgrade from a free account then you've already figured things out, so no free trial for you! You can cancel your account at any time on the Billing tab of your account settings.