Tone Calibration
During calibration, BioSigRZ performs a sweep over the frequency range of interest and
generates a speaker response curve along with a correction curve that would be required to
fl
atten the response. An FIR
fi
lter is calculated from the correction curve and stored in the
contents of the calibration
fi
le. When you load the calibration
fi
le, that
fi
lter is loaded onto the
RZ6 so that any Tone Pips presented through the RZ6 will be calibrated to have a
fl
at response
across all frequencies.
The extension for calibration
fi
les is .tcf. All TCF
fi
les should be stored at:
C:\TDT\BioSigRZ\TCF
For more information on
fi
le types and calibration see the
Click Calibration
The
RZ6_Click_Calibration.rcx
circuit is designed to allow you to calibrate the RZ6 for click
stimuli. This
fi
le is part of the
zipped example folder, which can be
downloaded from the TDT website. Download and extract the zipped
fi
les to:
C:\TDT\BioSigRZ\RCX
To use this circuit there are a few steps required for setup:
Connect your Calibration Microphone to the In-A port on the RZ6.
If your microphone has a sensitivity of less than 50 mV/Pa, ensure your Amp/BYP switch on
the front of the RZ6 is set to Amp.
Connect your speaker to Out-A or Electrostatic-A (if using Electrostatic-A, be sure the
Electrostatic On/Off switch is in the On position).
Place your microphone in the same position that your subject's ear would be located.
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Calibration | 43
