Rocking Modes (Part 2: Diagnostics)

Cardenas W, Klippel W. Rocking Modes (Part 2: Diagnostics). In: AES Convention 140. Audio Engineering Society; 2016. Paper 9496. Available from: https://aes.org/publications/elibrary-page/?id=18195

@inproceedings{Cardenas2016_18195,
  author = {Cardenas, William and Klippel, Wolfgang},
  title = {{Rocking Modes (Part 2: Diagnostics)}},
  booktitle = {AES Convention 140},
  note = {Paper 9496},
  year = {2016},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=18195}
}

TY  - CPAPER
TI  - Rocking Modes (Part 2: Diagnostics)
AU  - Cardenas, William
AU  - Klippel, Wolfgang
T2  - AES Convention 140
M1  - Paper 9496
PY  - 2016
DA  - 2016/05/06
UR  - https://aes.org/publications/elibrary-page/?id=18195
PB  - Audio Engineering Society
LA  - en
AB  - The rocking behavior of the diaphragm is a severe problem in headphones, micro-speakers, and other kinds of loudspeakers causing voice coil rubbing that limits the maximum acoustical output at low frequencies. The root causes of this problem are small imbalances in the distribution of the stiffness, mass, and force factor in the gap. Based on lumped parameter modeling, modal decomposition and signal flow charts presented in a previous paper (Part 1) this paper focuses on the practical measurement using laser vibrometry, parameter identification, and root cause analysis. New characteristics are presented that simplify the interpretation of the identified parameters. The new technique has been validated by numerical simulations and systematic modifications of a real transducer. The diagnostic value of the new measurement technique has been illustrated on a transducer used in headphones
ER  -