Helicopters are noticeably flying between 300 and 400 feet in the Makiki area. Not only is this loud but also potentially hazardous. Being that low doesn't give a pilot much reaction time should anything go wrong with the helicopter.
Quieter O'ahu Response:Aloha,
Thanks for your note. Yes, helicopters are among our greatest air-offenders. The continuing increase in tourism and the quick profits are encouraging this business and we expect to see it only get worse.
That said, we've posted on our website a new application/site that assists the difficult process of reporting aircraft noise. You can visit their website at https://www.airnoise.io, read about their service, and determine if this is something that might assist you in reporting helicopter noise. If you find it helpful, please let us know and we'll post your evaluation of this service.