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The authors propose a software system for pathological voice analysis and screening of laryngeal diseases that has the following properties: a) The analysis is totally noninvasive-the microphone is about 30 cm from the patient's mouth, and contact microphones or laryngophones are not used. b) The system is built around a low-cost personal computer (PC). The additional hardware consists of a standard sound card such as "Sound Blaster" (Creative Technology Inc., Paris, France). The card also includes a microphone. Any other analog-to-digital converter board allowing a sampling rate higher than 16 kHz, with 16 bit resolution (Sound Blaster and OROS have been already tested), and a linear phase condenser or electret microphone can be used to minimize the distortions during capture of the signal. c) The software is graphics-driven and user-friendly, therefore no special training is needed in using the system. d) The system is electrically safe since there is no electrical link between patient and PC.
Boyanov et al. (Tue,) studied this question.