For
Open Field
experiments, place the speaker 10 cm from the subject. Be sure to position it to
the side of the subject, in line with the ear, NOT in front of the subject.
For more information on the MF1 speakers and full system specs, see the
.
Closed Field Setup
Each MF1 comes with a tapered tip for
Closed Field
experiments. The tip mates with the
provided
⅛
" outside diameter (O.D.) PVC tubing (10 cm included). The MF1 comes with an
inline
fi
lter (pictured at left) that connects between the RCA cable and speaker input. This
fi
lter
should always be in place when using the MF1 speakers in closed-
fi
eld mode. In closed-
fi
eld
mode, the MF1 has undesirably high low frequency output. This
fi
lter reduces the speaker
output at low frequencies so that the output range can be equalized. When using the tube tip,
use the MF1's inline
fi
lter and the shortest tube possible. You can cut the 10 cm tube to the
desired length. A 3 - 5 cm tube length is typical. The tube should slide snugly into the tube tip.
You can push
fi
rmly without fear of damaging the tube. If you have trouble inserting the tube, a
small amount of silicon spray can be used. It may be easiest to spray silicone lightly on a cloth
fi
rst then put the tip of the tube on the cloth to apply it.
RZ6 Signal Processor
The RZ6-A-P1 Multi I/O Processor provides the processing power for averaging signal inputs
and the digital-to-analog converters and ampli
fi
ers for producing the stimuli. It also provides
the precise timing essential to evoked response experiments.
Other lubricants (WD-40, grease sprays, or similar) should not be used as they can damage the O-rings
surrounding the tube tip, or the tubes themselves.
Warning
The Test Equipment | 17
