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Facilities
The
ARL
is
the
sole user of the ARL itself, but also the primary user of
the Group Experimental Listening (GEL) laboratory and the
Anechoic/Echoic Test Chambers. In all of these facilities, 2-9
listening stations are contained within sound-treated booths. Each
listening station consists of a matched set of EAR-3A insert
earphones for stimulus delivery and a 15” touch-screen monitor
which is used to mark intervals during stimulus presentation and
collect responses from the listener. In all three facilities,
Tucker-Davis Technologies (TDT) hardware is used to generate, shape
and deliver stimuli to the listener under computer control using
custom MATLAB software.
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ARL: two
computer-controlled listening stations and four additional personal
computers for data reduction, data analysis, and other research-related
tasks;
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GEL: nine
computer-controlled listening stations, four in one sound booth and
five in another; and
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Anechoic/Echoic Test
Chambers: one computer-controlled listening station in each chamber
with sound stimuli delivered via an array of loudspeakers arranged in a
horizontal arc spanning ± 90 degrees azimuth.
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