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Interactive Display of Microphone Polarity Patterns with Non-Fixed Frequency Point

With the development of bidirectional and unidirectional microphones dating back to the 1930s, the parameter of directivity has been an integral aspect of microphone construction for nearly 100 years [1]. This characteristic is commonly visualized with the microphone’s sensitivity displayed as a radius r over a 360-degree span within a polar coordinate system. Measured directivity is generally shown as an overlay of well-defined frequencies [2]. Although this is common practice, in-depth analysis of the actual performance of a microphone is difficult. In this paper, a novel approach to displaying the directional characteristics of a microphone is presented, providing an interactive display of the angular sensitivity at any frequency. Furthermore, the application within microphone array development is discussed.

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