Assignment 1
Sound Seminar (COMP 790-058)
Date Assigned: 31st Jan, 2008
Deadline: 14th Feb, 2008
Problem Statement
(100): In this assignment you
are required to implement Image Source Method on a simple rectangular scene
and evaluate the effect of room size on the received sound at the listener.
The geometry and coordinate system are shown below.
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Consider the 6 cases listed below. For each of these cases, you are required
to compute the impulse response given a source-listener configuration on the
room. Also, use the impulse response to
spatialize a test signal (More details below). Note that if you assume
perfectly reflecting boundaries (i.e. absorption coefficient=0), the sound
will be too reverberant (try it out). Experiment with different wall
reflectivity values. However, you are
just required to submit the results for all the cases below with absorption
coefficient = 0.3 (i.e. reflection coefficient = .7) and order of reflection =
3.
1.
Small Room: A room with the
dimensions 8x5x3 meters (in X, Y and Z respectively) and one corner at the
origin.
a. Source = (4,2.5,1.5), Listener = (4,2.5,1.5);
b. Source = (1,2.5,1.5), Listener = (7,2.5,1.5);
c. Source = (3.7,2.8,1.2), Listener = (7.8,4.0,2.7);
2. Large Hall: A hall with the dimensions 32x20x12 meters.
a. Source = (4,2.5,1.5), Listener = (4,2.5,1.5);
b. Source = (1,2.5,1.5), Listener = (7,2.5,1.5);
c. Source = (3.7,2.8,1.2), Listener = (7.8,4.0,2.7);
Use the audio file (.wav format) from the following link http://www.odeon.dk/Wav2004/clapping!.wav as your test signal. Assume speed of sound = 343 m/s.
Expected Output: You are required to submit the following:
Extra Credits (50): Sound simulation in a gallery: We provide the geometry of the gallery in two different formats (OBJ and DXF). The model files can be obtained from the following links:
