Contribution
Messung der Richtcharakteristik von Mikrofonen mit hoher Auflösung
* Presenting author
Abstract:
Microphones are used in a wide range of acoustic applications where a thorough knowledge of the spatial response characteristics is essential. Currently, information on the directivity of microphones is mostly provided in the form of polar patterns, typically only for the azimuth plane with limited angular resolution and at most in one-third octave bands. With this data, it is difficult to predict the resulting error when interpolating any frequency or spatial angle. In this paper, a measurement setup is presented to measure a high resolution, three-dimensional ground truth of the directionality for a variety of microphones. Based on these measurements, a method is described for interpolating arbitrary spatial angles and frequencies based on a significantly reduced measurement grid, both in the amplitude and phase domain. Measurement uncertainties are analysed and compared with the current state of the art in loudspeaker measurement.