How much does the sound field in auditoria change from one position to the next?
- Research Area:
- Raum- und Bauakustik,
Room acoustical measurements with microphone arrays have shown that the sound field in auditoria changes significantly from one position to the next. This gives rise to the question how valid acoustical measurements in architectural acoustics are. This question that is of core relevance when it comes to characterizing the sound field in rooms based on a small number or singular measurements. At the Institute of Technical Acoustics, a measurement robot was designed, capable of conducting automated high-resolution sound-field measurements in auditoria over a larger area (5.5 x 8.0 m). This data can be used to investigate how severely the sound field changes from one position to the next. In this thesis acoustical measurements are to be conducted in different auditoria (lecture rooms and concert halls) to collect data that can serve as the foundation to derive a relationship between the change in acoustic conditions an the distance between two measurement positions. Goal of this thesis will be to answer two important questions: • For what size a region is a single measurement in a room valid? • How accurate need measurements to be documented so that the results are reproducible? This knowledge is of special interest to make acoustical measurements in architectural acoustics more efficient.