Image Assistant Print
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Thursday, 12 October 2006 10:00

The "Image Assistant 2.1" is an interactive JAVA Applet that calculates the localization curves of arbitrary 2- and 3-channel stereo microphone configurations.

Take a look at the theoretic basis (German) of the Image Assistant (background information about the psychoacoustical and mathematical fundamentals of the localization curves).

Instructions for the use of the applet

For the applet, a Java runtime needs to be installed. E.g. it should be working with Firefox 3.5, when Java is activated in the options.

Input parameters:
Microphone configuration: yellow box at the top left
 Base B
spacing between microphones L and R
 height h
spacing between the Base B and microphone C
 epsilon
angle between microphone L or R and the central symmetry axis
 distance
distance of the sound sources
 

Mic L

polar pattern of microphone L
 Mic C polar pattern of microphone C
 Mic R polar pattern of microphone R
 ConfigurationPresets, both for 2ch and 3ch setups
 Button "animate"
shows graphical simulation of the microphone setup geometry
 Button "set"shows popup window to change the time offsets of the microphone channels
Loudspeaker configuration (to simulate the consequences of off-center listening and the robustness of microphone configurations): blue box at the top right
 base widthspacing between loudspeakers L and R
 Setup
location of the loudspeaker C
 Listen
Presets for the listening position
 vertical offset
distance between the sweet spot and the listening position (front/back)
 

horizontal offset

distance between the sweet spot and the listening position (left/right)
Navigation area: green box on the right
 Radio buttons
"2 Mics/3 Mics"		Choice between L/R setup (2 Mics) and L/C/R setup (3 Mics)
 Show Localization
shows localization curves on the main axis,
checkboxes for choosing the curves
 Signal Relationships
shows signal relationships (Delta t and Delta L) on the main axis
 Signal differences
shows signal differences (Delta t and Delta L) on the main axis, radio buttons for chosing the analyzed loudspeaker pair
Legend: yellow box on the bottom right: depicts the graphs shown in the main window
Main window: shows the graphs

Last Updated on Sunday, 17 January 2010 08:30