Introduction - 9
Introduction
The PDD-401 is an IBM/PC based screening audiometer for
air conductive testing the hearing system.
There are two versions of the program one is the modular
version and the other one is with database management.
The modular version can be called from the host system. In this
case the host system has its own database management.
The database version has an integrated database management
system.
The PDD-401 makes easy to measure the hearing level. It is
well suited for screening and following up changes in hearing
level.
Thanks to the IBM/PC base it is easy to handle but at the
same time offers a lot of features. During measurement the
hearing level is shown in real time. Results can be printed out
even in colours.
The PDD-401 screening audiometer provides the following
modes and services:
• Manual mode
• Ascending algorithm
• Descending algorithm
• Automatic sequence
• Continuous signal
• Impulse signal
• Continuous interrupted signal
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