CLIOwin 7 PCI User's Manual - Audiomatica

Y scale unit
Selects the measurement units. It is possible to select Voltage (dBV, dBu, dBRel) or
Pressure (dBSPL) or Impedance (Ohm).
smoothing
Activates a frequency smoothing of the active curve.This smoothing effect will allow
a better appreciation of the general features of the response curve. The smoothing
algorithm that is employed averages all values within a fraction-of-octave band
surrounding each analysis frequency.
10.2.3 MLS & LOG CHIRP SETTINGS DIALOG
Figure 10.2
sampling
Selects the measurement sampling frequency. When LOG CHIRP is selected as
stimuli, 48kHz only is available.
size
Selects the size of the MLS & LOG CHIRP sequence.
window
Selects the appropriate kind of window for analyzing time data. It is possible to select
between a rectangular, Hanning or Blackman window; the last two can be full or half
sized. NOTE: These windows are applied to the time portion to be transformed with
FFT. If the start point is near the impulse, full windows will null the most important
part of the time response (due to their rise time). To evaluate the effects of a data
window refer to Chapter 9, and FFT measurements in general.
stimuli
Selects the kind of stimulus, either MLS and LOG CHIRP used for the measurement.
averages
Controls the averaging mode of operation. The measurement will be repeated and
averaged the number of times set, therefore obtaining a better signal-to-noise ratio
at the expense of reduced measurement speed. Continuous performs the number
of averages in the shortest time without waiting. Manual waits the user to press any
key between each measure; it is useful, for example, in averaging different
microphone positions.
impedance
Set how Impedance is calculated. When taking impedance measurements refer
either to the internal impedance mode or to the ISense feature of the CLIOQC
Chapter 10 - MLS 111