The Wave2D Handbook: Modeling Examples

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The recording of sound, or more general, the detailed observation of specific points, is one major feature of Wave2D. You may use this functionality to create impulse-responses, or to reverberate your sound directly, or to analyse specific output point in depth (with MATLAB for instance). Some Wave Field Synthesis algorithms require the measurement of impulse responses for instance. To record something, you have to adjust at least the following parameters:

Parameter	Settings
Output	you have to define at least one Output, you should furthermore set the name of the wave-file and the location of the output
Excitation	you can excite the wave field with an impulse, but you could also choose a sine function or even an external excitation, i.e. an arbitrary wave-file to reverberate your music
Boundary	by default the boundary reflection factor is zero, to simulate room acoustics you may want to set it to a realistic value, 0.6 for instance
Subsampling	the subsampling of the displayed frames is very useful for sound-recording, as it saves a lot of computational power; you may choose a subsampling factor of about 100, but be patient during simulation, as the pogram first calculates all the 100 frames and afterwards responds to your commands

The screenshot below shows a quadratic room with perfectly reflecting walls (reflection factor 1.0), which is excited by a sine function. The sound is recorded at the position indicated by the green marker.