Spatial Acoustic Loudspeaker Measurements With a Moving Microphone

Herzog S. Spatial Acoustic Loudspeaker Measurements With a Moving Microphone. J Audio Eng Soc. 2025;73(1/2):24-42. doi:10.17743/jaes.2022.0186

@article{Herzog2025_22791,
  author = {Herzog, Stephan},
  title = {{Spatial Acoustic Loudspeaker Measurements With a Moving Microphone}},
  journal = {Journal of the Audio Engineering Society},
  volume = {73},
  number = {1/2},
  pages = {24--42},
  year = {2025},
  month = jan,
  publisher = {Audio Engineering Society},
  doi = {10.17743/jaes.2022.0186},
  url = {https://doi.org/10.17743/jaes.2022.0186}
}

TY  - JOUR
TI  - Spatial Acoustic Loudspeaker Measurements With a Moving Microphone
AU  - Herzog, Stephan
T2  - Journal of the Audio Engineering Society
J2  - J. Audio Eng. Soc.
VL  - 73
IS  - 1/2
SP  - 24
EP  - 42
PY  - 2025
DA  - 2025/01/07
DO  - 10.17743/jaes.2022.0186
UR  - https://doi.org/10.17743/jaes.2022.0186
PB  - Audio Engineering Society
LA  - en
AB  - Acoustic loudspeaker measurements are an essential aspect in loudspeaker development and design. Established setups usually require acoustic measurement rooms or chambers where the speaker under test has to be installed for conducting the tests. Furthermore, typical spatial measurements require that the speaker has to be rotated on one or two axes. In addition to the traditional approach, there are different methods that use near-field measurements where the microphone is usually moved and the loudspeaker remains at a fixed position. Both techniques commonly make measurements at discrete points or angles in the spatial domain. In this article, the idea of making impulse response measurements in the near-field while the microphone is in movement is proposed and described. This approach leads to much faster results that can be comparable to the results of fixed-point measurements. The focus here is on the properties and the resulting processing of appropriate test signals and on the experimental verification of the method. This method will be applied to the measurement of line arrays, where directivity is of high interest, but it can also be used for other loudspeaker configurations.
ER  -