The Development of a Porous Metal Cone Loudspeaker

Ishii Y, Sugaya S, Itagaki Y, Mergner FK. The Development of a Porous Metal Cone Loudspeaker. In: AES Convention 58. Audio Engineering Society; 1977.pp. 1283:1-33. Available from: https://aes.org/publications/elibrary-page/?id=3071

@inproceedings{Ishii1977_3071,
  author = {Ishii, Yashiro and Sugaya, Shoji and Itagaki, Yusuke and Mergner, F. K.},
  title = {{The Development of a Porous Metal Cone Loudspeaker}},
  booktitle = {AES Convention 58},
  pages = {1283:1-33},
  url = {https://aes.org/publications/elibrary-page/?id=3071},
  year = {1977},
  month = nov,
  publisher = {Audio Engineering Society}
}

TY  - CPAPER
TI  - The Development of a Porous Metal Cone Loudspeaker
AU  - Ishii, Yashiro
AU  - Sugaya, Shoji
AU  - Itagaki, Yusuke
AU  - Mergner, F. K.
T2  - AES Convention 58
SP  - 1
EP  - 33
M1  - Paper 1283
PY  - 1977
DA  - 1977/11/06
UR  - https://aes.org/publications/elibrary-page/?id=3071
PB  - Audio Engineering Society
LA  - en
AB  - The paper describes the deficiencies encountered with bass drivers using conventional pulp paper cones with regard to sub-harmonic resonances resulting from non-rigid piston action of the cone. Prior attempts of improvements with the addition of certain fibers to the cone pulp material have been made. The development of a cone is described, explaining the reasons for selecting a double-layer construction with nickel of a certain porosity as cone material plus the addition of aluminum foil to achieve high bending stiffness (with high Young's modulus) and still low weight for a high upper usable frequency limit. Comparative measurements are shown plus photos visualizing holographically cone vibration patterns by the time-average technique. Using this double-layer construction, the onset of harmful resonances could be considerably moved up in frequency to extend the useful change of the driver.
ER  -