A new overnight flight path will be trialled over Perth in a bid to reduce aircraft noise in riverside suburbs, including Applecross, Riverton and Shelley.

The temporary flight path for aircrafts flying out of Perth in a northern and westerly direction will be trialled in two fortnightly blocks starting next week.

Airservices Australia (ASA), responsible for airspace management, conducted an environmental assessment last year for the trial, which found the new path would not provide an overall noise improvement for the community.

The government-owned entity decided not to proceed with the trial but after feedback from stakeholders and the community decided to go ahead with it.

Airservices community relations manager Elissa Keenan said it was a good opportunity to test the agency's modelling.

"We think it's a great opportunity to really do this validation study, and see what the actual noise levels come out at," she said.

"We want to ensure that our modelling is robust."

The trial will start on February 15 and be suspended on March 6, and then resume from March 21 to April 10, between 10:00pm and 5:00am.

The new flight path will see aircraft fly in a straight line without turning until they are adjacent to Jandakot Airport.

Monitors will be placed along the new flight path in the suburbs of Langford, Canning Vale, Cockburn Central, Munster, Beeliar and Beaconsfield to record aircraft noise levels.

The Federal Member for Swan, Steve Irons, welcomed the trial.

"It's been an issue [in the past] because of the change of flight paths without any, or with minimal consultation, by ASA to the community, it created some angst," he said.

"Particularly to people who had done their due diligence and bought places where there were no flight paths, and all of a sudden they changed and were in flight paths so it's become quite an issue."

But he conceded residents living along the new flight path might object.

"I am sure they'll object to the trial but at the same time ... we live in a community and it's not fair that all the aircraft noise is concentrated in one area," he said.

"We're looking for options all over the metropolitan area to try to share that noise around."

Airservices will analyse the data and publish a summary report of the findings online.

If it finds the readings reflect the same findings of the environmental assessment, Airservices said they would not make changes to their flights.