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

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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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Permalink: http://www.aes.org/e-lib/browse.cfm?elib=18667

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