second interval. The threshold sound levels for selected set of frequencies is stored in a TTH file that has the same
name as CAL file that contains the ear canal pressure response.
The File/Open function can be used to view either CAL or TTH files.
3. Configuration parameters
The configuration (initialization) file is called “putt.ini” by default and can be located either in (1) the current
directory, (2) the directory containing the program (putt.exe), or (3) any directory listed in the PATH environment
variable. The configuration file is divided into five sections SYSTEM, PRINTER, HEARING, PROBE, and TONE.
Each section begins with a line containing the name of the section enclosed in brackets. The parameters that can be
given values are described below for each section. The default value for each parameter is indicated. Lines that
begin with a semicolon in the configuration file are ignored and can be used for comments or to temporarily disable
a parameter setting. The letters in the parameter name are not case-sensitive. Many of the parameters may also be
set through the Options menu in PUTT. Changing a parameter value within PUTT will not change the default value
specified in the configuration file.
SYSTEM Parameters
The SYSTEM section begins with a line containing the word SYSTEM in brackets like this: [SYSTEM].
Parameters in this section apply to all tests. They are specific to the sound card and the load characteristics of your
hardware, therefore separate configuration files may need to be required for different equipment configurations. The
following list of SYSTEM parameters includes default values.
AD_
type = 0
This parameter is obsolete. Previously, if this parameter were set to 1, the program would skip clock synchronization
checks for the Ariel DSP-16+.
DSP = W
Type of soundcard: W=Windows.
DSP_
code =
Name of the file containing DSP code that needs to be uploaded to the soundcard.
GREG = 16
This parameter is obsolete. Previously, this parameter modified the allocation of data memory. The current version
always allocates 16K words of for data, which allows DPOAE size up to 2048, and TEOAE size up to 1024.
refresh = 5
Number of seconds between automatic screen refreshes. If refresh is set to zero, automatic refresh is disabled.
The following parameters modify the Hearing Test in PUTT when specified in putt.ini. Program default values are
in brackets.
DA1_sensitivity = 0
Sensitivity of the first (or Left) D/A converter in count per volt. When set to zero, the value is calculated
from ARSC registry volts-full-scale value.
Page 4
(17 pages)
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