Bioacoustics is dealing with human organs and the organs of the next living creature of which their function is connected to an using of acoustic waves summary of an acoustics using. Bioacoustics is dealing especially by the human voice generation and by the hearing perception. The source voice is generated by the vocal folds and is adapted when is going through the vocal tract. The source voice differs when it is generated in whisper or in aloud. The source voice is a cause of the formant excitation of individual vowels according the set up of the vocal tract. The formants are the natural frequencies of the vocal tract.
The other organ using the acoustic waves properties and vibro-acoustic systems anywise is a hearing system. The hearing apparatus catches the acoustic waves from surrounding environment and by means of complicated electrical-mechanical system them transformed into signals which are sent further into brain.