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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, Chrome, IE, when a Java runtime is installed.

Input parameters:

Microphone configuration:
yellow box at the top left

Loudspeaker configuration:
blue box at the top right
Base B spacing between microphones L and R

base width

spacing between loudspeaker L and R
height h spacing between the Base B and microphone C

Setup

location of the loudspeaker C
epsilon angle between microphone L or R and the central symmetry axis

Listen

Presets for the listening position
distance distance of the sound sources

vertical offset

distance between the sweet spot and the listening position (front/back)

Mic L

 polar pattern of microphone L

horizontal offset

distance between the sweet spot and the listening position (left/right)
Mic C polar pattern of microphone C
Mic R polar pattern of microphone R
Configuration Presets, 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

Navigation area: green box on the right

Legend: yellow box on the bottom right: depicts the graphs shown in the main window
Radio buttons
"2 Mics/3 Mics"		 Choice between L/R setup (2 Mics) and L/C/R setup (3 Mics)

Main window: shows the graphs
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

Last Updated on Wednesday, 23 March 2011 20:14