Acoustic Magic Voice Tracker I Instructions
Browse online or download pdf Instructions for Microphone Acoustic Magic Voice Tracker I. Acoustic Magic Voice Tracker I 2 pages.
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General Setup
Connect the power and audio cables to their appropriate
jacks on the back of the Voice Tracker
Figure 1). Plug the power adapter into a standard 110-
volt wall outlet and connect the other end of the audio
"mic in"
cable to the
card. The adapter supplies 6V DC power (center pin
positive) to the microphone.
Figure 1 – Audio and Power Cable Connections
TM
The Voice Tracker
Array may be used as the audio
input device for a variety of speech and multi-media
applications.
Many of the software packages which
utilize a speech input have setup tools, which allow you
to specify that you are using the "mic In" connection on
your soundcard and to adjust the sound level (volume)
automatically. Please refer to your specific application
software for details.
selection manually on a Windows PC, see the Adjusting
Your
Soundcard section
instructions.
Positioning
Aim the array in the direction of the desired talker(s).
When properly positioned, the talker will be able to see
all 5 green position indicators.
Figure 2 – Voice Tracker
TM
The Voice Tracker
can be tilted up or down to facilitate
mounting on the desktop (tilted up) or on the monitor
(tilted down). For speech recognition applications, the
desktop position will exhibit slightly better performance.
If you mount it on top of the monitor, makes sure it is
secured so it doesn't fall off. The Voice Tracker can be
mount on the ceiling by removing the weight in its base,
and using the 4 screw hole in the base.
TM
Array (see
input on your computer's sound
To adjust the volume or input
at
the
end
of
TM
Array Front View
Mode Switches
The Voice Tracker
by two switches:
Dependent Squelch
Figure 3 – Field and LDS
The Field switch determines the scanning range of the
array. In the wide-angle mode, the Voice Tracker
scan +/- 90 degrees. This is useful if the user desires to
listen to an entire room. In the narrow-angle mode, the
array will scan +/- 45 degrees. The narrower scanning
range helps to reduce the impact of undesired talkers
and noise sources outside the region of interest. Note
that the Voice Tracker does pick up sound from behind,
giving it a full 360 degree field of view. However, it is
more sensitive in the forward direction.
When the LDS
will turn off during periods of silence and when the sound
source is located outside the array's reception region as
determined by the Field switch.
these
again very quickly when the user resumes talking.
When used together with the narrow field of view, the
TM
LDS
can be employed to ignore unwanted sounds.
Once the talker pauses and the Voice Tracker
off, the array will only turn on again when sounds come
from within the +/- 45 degree listening area (see Fig 4).
For speech recognition applications, when the limited
scan range and LDS are on, the generation of spurious
words or commands from sources outside the listening
area will be reduced. However, since the beginnings of
words may be clipped off, recognition accuracy may
suffer. The user should decide whether this feature
improves
TM
has 4 operational modes, selected
the Field switch and the Location
TM
TM
(LDS
) switch (see Figure 3).
TM
switch is set to On, the Voice Tracker
Figure 4 – Listening Area
performance
in
their
TM
Switches
TM
will
TM
The array turns on
TM
turns
particular
noise