![]() ![]() ![]() Both the direct sound and the room impulse response are then convolved with the receiver’s HRTF to create a binaural sound file. Once the virtual room is set up, ray tracing and image source methods are commonly used for generating a room impulse response in the room.įor reduced computational time in this step, many programs use a hybrid method that utilizes both ray tracing and image sources to calculate the room impulse response. The source and receiver must be placed in the correct locations within the virtual room. Rooms can also be modeled geometrically, including correct absorption and scattering coefficients for the surfaces. Rooms can be measured acoustically with a known sound source and several microphones. How the source excites a room is another question. The directivity of the sound source, whether a human voice, or a loudspeaker, or a musical instrument, must be accurate. Each step requires consideration for accuracy and detail. The head-related transfer functions (HRTFs) of the listener are then convolved with the direct and reverberant sound to create a binaural signal, different for each ear. Next, the room response, real or virtual, to the sound source must be convolved with the direct sound. First, the directivity and sound power of a sound source must be considered. There are several steps to creating an auralization. EASE is one program available for acoustic room modeling.Īuralization is, according to Vorlander,"the technique of creating audible sound files from numerical (simulated, measured, or synthesized) data." ![]()
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