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Thursday, July 11 • 09:20 - 09:40
PREDICTION OF THE SPEECH TRANSMISSION QUALITY IN THE PRESENCE OF BACKGROUND NOISE USING THE RAY TRACING TECHNIQUE

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Noise levels inside commercial aircraft and automobile impact both the quality of the speech communication between the crew members and the communication between the crew and passengers. Noise measurements are expensive and have significant variability. Therefore, geometrical techniques can be used as an alternative to predict the steady state frequency response or the impulse response. This paper presents a ray-based technique to predict the acoustic response and speech transmissibility indices inside aircraft and auto-mobile. The effect of the background acoustics levels on speech communication is ana-lyzed. Moreover, the effect of the acoustic treatments on the reflected field and its inter-ference with the direct field perceived by the listener is analyzed.

Moderators
ST

Stephan Tewes

Interior Noise Integration & Vibration, Airbus Operations GmbH

Authors

Thursday July 11, 2019 09:20 - 09:40 EDT
St-Laurent 6
  T03 Aero… aircrft noise & vibr., SS04 Aircr cabin noise & vibr cntrl