Distributed Mechanical Parameters Describing Vibration and Sound Radiation of Loudspeaker Drive Units

Klippel W, Schlechter J. Distributed Mechanical Parameters Describing Vibration and Sound Radiation of Loudspeaker Drive Units. In: AES Convention 125. Audio Engineering Society; 2008. Paper 7531. Available from: https://aes.org/publications/elibrary-page/?id=14683

@inproceedings{Klippel2008_14683,
  author = {Klippel, Wolfgang and Schlechter, Joachim},
  title = {{Distributed Mechanical Parameters Describing Vibration and Sound Radiation of Loudspeaker Drive Units}},
  booktitle = {AES Convention 125},
  note = {Paper 7531},
  year = {2008},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=14683}
}

TY  - CPAPER
TI  - Distributed Mechanical Parameters Describing Vibration and Sound Radiation of Loudspeaker Drive Units
AU  - Klippel, Wolfgang
AU  - Schlechter, Joachim
T2  - AES Convention 125
M1  - Paper 7531
PY  - 2008
DA  - 2008/10/06
UR  - https://aes.org/publications/elibrary-page/?id=14683
PB  - Audio Engineering Society
LA  - en
AB  - The mechanical vibration of loudspeaker drive units is described by a set of linear transfer functions and geometrical data which are measured at selected points on the surface of the radiator (cone, dome, diaphragm, piston, panel) by using a scanning technique. These distributed parameters supplement the lumped parameters (T/S, nonlinear, thermal), simplify the communication between cone, driver and loudspeaker system design and open new ways for loudspeaker diagnostics. The distributed vibration can be summarized to a new quantity called accumulated acceleration level (AAL) which is comparable with the sound pressure level (SPL) if no acoustical cancellation occurs. This and other derived parameters are the basis for modal analysis and novel decomposition techniques which make the relationship between mechanical vibration and sound pressure output more transparent. Practical problems and indications for practical improvements are discussed for various example drivers. Finally, the usage of the distributed parameters within finite and boundary element analyses is addressed and conclusions for the loudspeaker design process are made.
ER  -