Fast Loudspeaker Measurement in Non-Anechoic Environments

Bellmann C, Klippel W. Fast Loudspeaker Measurement in Non-Anechoic Environments. In: AES Convention 143. Audio Engineering Society; 2017. Paper 9825. Available from: https://aes.org/publications/elibrary-page/?id=19222

@inproceedings{Bellmann2017_19222,
  author = {Bellmann, Christian and Klippel, Wolfgang},
  title = {{Fast Loudspeaker Measurement in Non-Anechoic Environments}},
  booktitle = {AES Convention 143},
  note = {Paper 9825},
  year = {2017},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=19222}
}

TY  - CPAPER
TI  - Fast Loudspeaker Measurement in Non-Anechoic Environments
AU  - Bellmann, Christian
AU  - Klippel, Wolfgang
T2  - AES Convention 143
M1  - Paper 9825
PY  - 2017
DA  - 2017/10/06
UR  - https://aes.org/publications/elibrary-page/?id=19222
PB  - Audio Engineering Society
LA  - en
AB  - The evaluation of the loudspeaker performance requires a measurement of the sound pressure output in the far field of the source under free field condition. If the available test room does not fulfil this condition, it is common practice to generate a simulated free field response by separating the direct sound from the room reflection based on windowing and holographic processing. This paper presents a new technique that performs a filtering of the measured sound pressure signal with a complex compensation function prior to other time and frequency analysis. The influence of room, nearfield and positioning error is compensated in the measured fundamental and nonlinear distortion characteristics. Different methods are presented for the generation of the compensation function based on a reference response measured under anechoic conditions and a test response measured under in-situ conditions. Benefits and particularities are demonstrated by practical measurements using different kinds of test signals.
ER  -