AVProAlliance AViMUX4 Operation And Application Manual - Page 14

Browse online or download pdf Operation And Application Manual for Microphone system AVProAlliance AViMUX4. AVProAlliance AViMUX4 17 pages. Professional microphone multiplexer

Print Page
APPLICATION

Introduction

The AVProAlliance.com iMUX4 allows an analyzer to average sound from multiple
microphones in a room, providing a single RTA or FFT test display. When sound is time
averaged from multiple microphones, measuring different positions in the room, the resulting test
display is called "spatially averaged." Spatial averaging indicates the average response of the
room across the entire seating or listening area rather than from a single point in the room. This
is ideal for low frequency measurements where point to point variability introduces a high degree
of uncertainty. A spatially averaged measurement is considered the most accurate representation
of the true low frequency response of a room and is essential for accurate calibration.

Measurement Setup

To use the iMUX4 and SSD AudioTools to measure a room's spatially-averaged frequency
response, use the setup illustrated in Figure 5. Run cables from the microphones to the respective
MIC IN jacks of the iMUX4. Connect the cable from the iAI2 to the iMUX4 and connect the
iPad connector from the iAI2 to the iPad as shown below. The iMUX4 case facilities these
connections for maximum efficiency on the jobsite.
The iMUX4 case allows for the deployment and storage of microphones fully connected. This
means that the process of setting up is greatly expedited and simplified. The only connection
necessary will be attaching the iPad to the iAI2 using its connector. Due to the short length of
the iAI2 connector it's recommended that you place the iPad on top of the iMUX4 case for use.
The long high quality microphone cables allow easy reach of most locations in the room.
Multiple Mics
iMUX4
MICROPHONE MULTIPLEXER
MIC
MIC
MIC
MIC 1
2
3
4
3
2
4
1
1-4
Room
MICROPHONE
SELECTION
Figure 10. Typical setup for analyzing a room with the iMUX4 & iPad with iAI2
13