The audiometer is widely used for clinical purposes as a voice generator. The aim of the audiometric examinations is to diagnose the malfunctions and physical changes in the auditory system. Audiometers, which are distributed separately (separate hardwares) are quite expensive, however; with ensuring the adequate conditions (such as good quality audio card, adequate audiometric headset, etc.), their functioning on PC are equal to 5-10 dB punctual distributed audiometers. The elementary requirements towards audiometers are the calibration and a simple, transparent platform for users with average computer knowledge.
The aim of my thesis was to implement a software that allows the measurement of hearing threshold.
In the first part of the thesis I present human hearing, the relationship between the sound volume as perceived by human ear and the physical extent of human voice; the definitions necessary to understand the concepts of audiometry methods, the basic subjective audiometric procedures.
I overview in details the air conduction threshold measurement method managed by my program and review other pure tone audiometry and speech audiometry tests, which are foreseen to be implemented in later versions.
In the second part I review the operation of the PC audiometer software, and I document the major functional parts of my program. Finally, I describe calibration and testing of the software.