Measurement and modeling techniques for directional sound radiation from the mouth

In this paper, modeling and measuring the directivity characteristics of human speakers are investigated. Using modern digital audio signal processing techniques, it is possible to simulate human speakers interactively in a virtual acoustical environment. This raises the question of finding appropriate data for the directional radiation characteristics of the mouth and the human head. In this paper, it is shown that a reciprocity method can be used to approximate the free-field spatial pressure distribution around a rigid sphere. Furthermore, this method is applied to obtaining the directivity of a dummy head. The hypothesis of using this novel reciprocity method successfully in practical directivity measurements is verified