Refinements in the Impulse Testing of Loudspeakers

Fincham LR. Refinements in the Impulse Testing of Loudspeakers. In: AES Convention 74. Audio Engineering Society; 1983. Paper 2055. Available from: https://aes.org/publications/elibrary-page/?id=11709

@inproceedings{Fincham1983_11709,
  author = {Fincham, Laurie R.},
  title = {{Refinements in the Impulse Testing of Loudspeakers}},
  booktitle = {AES Convention 74},
  note = {Paper 2055},
  year = {1983},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=11709}
}

TY  - CPAPER
TI  - Refinements in the Impulse Testing of Loudspeakers
AU  - Fincham, Laurie R.
T2  - AES Convention 74
M1  - Paper 2055
PY  - 1983
DA  - 1983/10/06
UR  - https://aes.org/publications/elibrary-page/?id=11709
PB  - Audio Engineering Society
LA  - en
AB  - The evaluation of a loudspeaker's transfer function or frequency response (amplitude and phase) via digital processing of its measured impulse response is now an established technique. During ten years experience with the method, many practical problems of measuring accuracy were encountered. This paper will discuss the causes and suggested remedies for reducing measuring errors, particularly at low frequencies, due to drive unit nonlinearities, signal averaging in the presence of both random and synchronous background noise, and DC offset in the A/D converter. In addition, a novel method for accurately determining the free field response of a loudspeaker system down to very low frequencies will be presented. It will be shown that it is possible using this method to estimate a loudspeaker's frequency response to an accuracy of better than 1 dB down to 20 Hz using only 10mS of its impulse response measured in a non-anechoic environment.
ER  -