The MX4410 microphne multiplexer is a device that allows a single channel Real Time
Analyzer to average information from up to four microphone
positions in a single test. When this information is processed
by an analyzer that has "time averaging", the resulting curve is
called "spatially averaged". Spatial averaging is recommended by
all of the major film cinema/home theater organizations,
including LucasFilm, and Dolby Laboratories.
The advantage of multiplexing is that the resulting curve on the
real time analyzer reflects the overall response of the room
across the entire seating area, rather than only the acoustics
of a single point in the room. The multiplexer itself is
essentially a small 4x1 mixing board combined with a switching
network that automatically samples information from each of the
microphones for a specified amount of time.
The MX4410 allows the user to enable single channels or any
combination of channels, allowing for comparison of individual
microphone locations versus the spatially averaged data from
multiple microphone tests. Each of the four channels has a gain
control to allow the user to match the input level from
different locations.
The MX4410 can be used with the TEF20 and with all Gold Line 1/3
octave Real Time Analyzers as well as with most other popular
models. The MX4410 is provided with three DSP30 model TEF04
reference microphones.
