Determining an Empirical Emission Model for the Auralization of Jet Aircraft
Invited paper
Empa
Tuesday 2 june, 2015, 10:20 - 10:40
0.3 Copenhagen (49)
Abstract:
Aircraft noise is a major issue in urban areas and is one of the research topics
within the FP7 SONORUS project. Current methods for determining the impact of
aircraft noise on annoyance and sleep disturbance are based on energetic
quantities neglecting the dynamic character of the sound. To obtain a more
complete representation of annoyance, one should predict the audible aircraft
sound and determine the impact of the aircraft sound on people.
In a related project at Empa, sonAIR, recordings were made of aircraft taking off
and
landing. These recordings were made at several positions and with several
microphones simultaneously. Combined with cockpit data, flight path information
and an inverse sound propagation model, this gives the possibility to determine
the emission as function of aircraft conditions and observer angle.
An inverse sound propagation model is used to determine the emission in the
time-domain. The obtained signal corresponds to the immission of a microphone
flying along with the aircraft and rotating about it. The time-domain approach
allows extracting narrowband information like tones and time-dependent variations
like modulations.