Project Outline

Experiment

Investigation into Rayleigh's Duplex theory and the Doppler effect using Binaural Microphones inserted into a dummy head within an anechoic environment. Tones are created in Csound and played through a loudspeaker at a set distance and set angle from the dummy head. To keep things simple, the source will only lie along the azimuth angle of the dummy head, this allows us to focus on the binaural cues that are the basis of Rayleigh's Duplex theory.

Once confirming Rayleigh's Duplex theory, an investigation into the relationship between the Doppler effect and Interaural Time Differences (ITD) will be setup using a moving source along the horizontal plane.


Synthesis

The recordings taken with the binaural microphones will be analysed, represented in Csound using the ILDs, ITDs and IPDs of a range of tones, played back through headphones and compared to the binaural recording, synthesizing both the Duplex theory and the Doppler effect.