Every time you generate a complaint Airnoise tries several methods to find the aircraft nearest you that is most likely responsible for the noise. There are some circumstances where Airnoise simply can't find an airplane, and depending on how the airport's complaint system is configured, it may not submit that complaint into the airport's official complaint system. Every complaint is recorded in Airnoise regardless.
When Airnoise looks for aircraft near you but can't find one, there are a few common cases why that may be:
Some airports use commercial noise monitoring systems that can correlate noise complaints with FAA radar data in order to find the aircraft nearest you when you generate a complaint. Airnoise looks for aircraft for every complaint that's filed so that you have an independent source of data on what's flying over your home, information you can't reasonably get from the airport or easily find for yourself. For these airports, Airnoise will submit your complaint even if it doesn't find an aircraft.
For airports that don't use these commercial systems, or in cases where the air traffic in an area is very dense, if Airnoise can't identify a specific aircraft as the likely culprit for the noise, the complaint won't be submitted to the airport's system. This prevents filing lots of complaints that can't be tied to an aircraft event, either by Airnoise or by the airport, and which the airport can't really analyze since they lack the tools to do so. We analyze the situation at every airport to determine how to make the biggest impact and try to strike a balance between making your voice heard and overwhelming airports that are unable to properly analyze every complaint that comes in. If a complaint isn't submitted, it will show 'unsent' in the complaint dashboard.