Uncertainty of the Source Directivity

Omnidirectional sources represent an integral part of acoustic measurement systems as their acceptance, particularly for dodecahedron loudspeakers, has become almost universal. For higher frequencies, the radiation pattern of an omnidirectional source loses homogeneity, since its directivity diverges significantly from an ideal spherical shape. As a consequence, the final measurement is affected by inaccuracies that can be expressed in terms of uncertainty. This project developed a model to quantify the influence of the source directivity on the measurement uncertainty.

Related topics: Architectural Acoustics, Measuring Techniques in Acoustics