Automatic Equalization of Flat TV Loudspeakers Using Parametric IIR Filters

Behrends H, von dem Knesebeck A, Bradinal W, Neumann P, Zölzer U. Automatic Equalization of Flat TV Loudspeakers Using Parametric IIR Filters. In: AES Convention 126. Audio Engineering Society; 2009. Paper 7802. Available from: https://aes.org/publications/elibrary-page/?id=14998

@inproceedings{Behrends2009_14998,
  author = {Behrends, Herwig and von dem Knesebeck, Adrian and Bradinal, Werner and Neumann, Peter and Zölzer, Udo},
  title = {{Automatic Equalization of Flat TV Loudspeakers Using Parametric IIR Filters}},
  booktitle = {AES Convention 126},
  note = {Paper 7802},
  year = {2009},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=14998}
}

TY  - CPAPER
TI  - Automatic Equalization of Flat TV Loudspeakers Using Parametric IIR Filters
AU  - Behrends, Herwig
AU  - von dem Knesebeck, Adrian
AU  - Bradinal, Werner
AU  - Neumann, Peter
AU  - Zölzer, Udo
T2  - AES Convention 126
M1  - Paper 7802
PY  - 2009
DA  - 2009/05/06
UR  - https://aes.org/publications/elibrary-page/?id=14998
PB  - Audio Engineering Society
LA  - en
AB  - Small speakers used in the today's flat television set cabinets and the requirement for 'invisible sound' lead to a frequency response which is influenced in a very disadvantageous way by the physical design constraints. Speakers are deeply embedded within the cabinet - the sound is thus forced through narrow vents, funnels or other waveguides. Down- or backfiring placements of the speakers are also common practice, in order to minimize the visibility of loudspeakers as much as possible. Generally, this leads to a non-flat frequency response with a strong coloration of the sound. We present an approach to compensate these effects by means of simple second order equalizer sections ('biquads'), where center frequency, gain and bandwidth of the equalizer sections are automatically calculated from a measured frequency response. The tool is usable in a laboratory environment, with relatively inexpensive standard PC sound cards and microphones.
ER  -