Calorimetric Evaluation of Intrinsic Friction in the Loudspeaker Membrane

Petosic A, Djurek I, Djurek D. Calorimetric Evaluation of Intrinsic Friction in the Loudspeaker Membrane. In: AES Convention 125. Audio Engineering Society; 2008. Paper 7593. Available from: https://aes.org/publications/elibrary-page/?id=14744

@inproceedings{Petosic2008_14744,
  author = {Petosic, Antonio and Djurek, Ivan and Djurek, Danijel},
  title = {{Calorimetric Evaluation of Intrinsic Friction in the Loudspeaker Membrane}},
  booktitle = {AES Convention 125},
  note = {Paper 7593},
  year = {2008},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=14744}
}

TY  - CPAPER
TI  - Calorimetric Evaluation of Intrinsic Friction in the Loudspeaker Membrane
AU  - Petosic, Antonio
AU  - Djurek, Ivan
AU  - Djurek, Danijel
T2  - AES Convention 125
M1  - Paper 7593
PY  - 2008
DA  - 2008/10/06
UR  - https://aes.org/publications/elibrary-page/?id=14744
PB  - Audio Engineering Society
LA  - en
AB  - Friction losses in the vibrating system of an electrodynamic loudspeaker are represented by the intrinsic friction Ri which enters the equation of motion, and these losses are accompanied by irreversible release of the heat. A method is proposed for measurement of the friction losses in the loudspeaker's membrane by measurement of the thermocouple temperature probe glued to the membrane. Temperature on the membrane surface fluctuates stochastically as a result of thermo-elastic coupling in the membrane material. Evaluation of the amplitude in the temperature fluctuations enables an absolute and direct evaluation of intrinsic friction Ri entering friction force F=Ri•v(x), irrespective of the nonlinearity type and strength associated with the loudspeaker operation.
ER  -