Experimental Investigation of High-Resolution Measurements of Directivity Patterns
* Presenting author
Abstract:
The directivities of sound sources typically play a significant role in the perception of an acoustic scene and may therefore become an essential aspect to consider in order to achieve realistic sound environments for Virtual Reality applications. Characterising directivity patters of sound sources requires the measurement of the emitted sound pressure at multiple positions around it. This can either be done simultaneously by using large surrounding microphone arrays, or sequentially, for example with the help of a turntable and a device that guarantees repeatable and accurately reproducible sound excitation. The former approach has often been used to measure musical instruments and gives accurate information of directivity for low frequencies, while directivity data at higher frequencies is often limited by spatial aliasing as a consequence of the sampling strategy. To overcome this limitation, this study follows the latter approach to experimentally gather high angular resolution (0.5º) directivity patterns of a trumpet, measured under anechoic conditions using artificial excitation.The obtained high angular resolution directivity patterns are discussed with a focus on their possible impact on sound perception.