How Is Aircraft Noise Generated?
How is aircraft noise generated?
Aircraft noise is produced by the aircraft engines and the airflow around the aircraft body and wings. The engines are responsible for much of the aircraft noise during takeoff and climb, while the airflow is typically causing noise during landing as the aircraft has deployed its flaps and landing gear.
How much noise does an aircraft make?
Different aircraft types with different engines, speeds, and shapes produce different noise levels. Furthermore, different weather conditions such as air pressure, temperature and wind also affect noise levels. Today’s modern aircraft produce 75% less noise than those built 40 years ago and new aircraft will continue to present new technology that will further reduce noise footprints.
The images below give an indication of the altitude aircraft fly and the noise levels generated for two typical aircraft types flying to and from Melbourne.
To put these noise levels in perspective, we made a comparison of sound levels you are likely to experience on a regular basis. It is important to note that a sound becomes twice as loud for every 10 decibel increase.
There are considerable differences in how people respond to the same noise levels. It also depends on the duration and frequency of the noise events and the time they take place.