Using a multilateration strategy to determine the sensor positions in acoustic array measurements

Convention of the European Acoustics Association Forum Acusticum, pp. 1685–1692

Abstract

In acoustic array applications, it is important to know the sensor positions as precisely as possible in order to reduce the residual terms in the subsequent data processing.Depending on the mechanical design, especially with larger setups, the situation can arise, that the actually reached sensor positions are uncertain.In this contribution array measurements to sample the sound field in auditoria over an area of 8m x 5.3m are presented.A special focus is placed on the discussion how the measurement locations can be determined as accurately as possible.Several secondary loudspeakers were installed in the array, which allow surveying the direct sound propagation in the setup.Using an acoustic multilateration approach on this data, the positions of the sensors can be determined.A special feature of this quasi-blind approach is that the input data for the multilateration can be uncertain.The uncertainty of the so identified measurement locations is evaluated and the relevance for the subsequent data processing is discussed.

Authors 2

1. Ingo B. Witew Aachen Institute for Hearing Technology and Acoustics

   RWTH Aachen University

   Affiliation as printed

   Institute for Hearing Technology and Acoustics, RWTH Aachen

2. Michael Vorländer Aachen Institute for Hearing Technology and Acoustics

   RWTH Aachen University

   Affiliation as printed

   Institute for Hearing Technology and Acoustics, RWTH Aachen