Under construction
The Microphone/Speaker Array
- The microphone array was developed by Cedrick Rochet, at the National
Institute for Standards and Technology (NIST). It consists basically of
a motherboard that synchronizes the signals of up to eight childboards,
each equipped with eight microphones. The motherboard has an IP interface,
and a driver that runs on a Linux server. All signal processing programming
tasks are carried out in C under Linux.
- The basic setup (click on each picture to enlarge):
Left: motherboard, connects 8 childboards, provides an IP interface;
Middle: childboard, contains 8 microphones;
Right: 64 microphones hooked to a single motherboard -- we have four of these.
- Creating an array of speakers out of the same basic technology used
in the microphone array was the next step in the development of our
platform; Cedrick Rochet custom developed it for us. The basic setup
(click on each picture to enlarge):
Left: complete setup;
Middle: speakers on a plane, microphones perpendicular;
Right: control equipment.