The Evaluation System for the Computer Simulation of the Crackles in Respirations

The computer synthesized crackles were simulated by 1) respiration signal in the approaching saw tooth wave; 2) modulation (amplitude modulation and frequency modulation); 3) adding noises and pulses of the crackle sources; 4) Butterworth filter; and 5) the output in wave, audio signal and spectrogram. The output of the computer simulations should be examined by the medical doctors. Therefore, an online questionnaire has been created for the evaluation of the computer simulations. The assessment of the computer synthesized crackles is the references to modify the parameters for the computer simulation. Therefore, the better quality of the computer simulation for the crackles will be expected as well as the human-like breaths will be successfully implemented.