On the Study of the Ionic Microphone

Akino H, Shimokawa H, Kikutani T, Green J. On the Study of the Ionic Microphone. J Audio Eng Soc. 2014;62(4):254-264. doi:10.17743/jaes.2014.0013

@article{Akino2014_17137,
  author = {Akino, Hiroshi and Shimokawa, Hirofumi and Kikutani, Tadashi and Green, Jackie},
  title = {{On the Study of the Ionic Microphone}},
  journal = {Journal of the Audio Engineering Society},
  volume = {62},
  number = {4},
  pages = {254--264},
  year = {2014},
  month = apr,
  publisher = {Audio Engineering Society},
  doi = {10.17743/jaes.2014.0013},
  url = {https://doi.org/10.17743/jaes.2014.0013}
}

TY  - JOUR
TI  - On the Study of the Ionic Microphone
AU  - Akino, Hiroshi
AU  - Shimokawa, Hirofumi
AU  - Kikutani, Tadashi
AU  - Green, Jackie
T2  - Journal of the Audio Engineering Society
J2  - J. Audio Eng. Soc.
VL  - 62
IS  - 4
SP  - 254
EP  - 264
PY  - 2014
DA  - 2014/04/06
DO  - 10.17743/jaes.2014.0013
UR  - https://doi.org/10.17743/jaes.2014.0013
PB  - Audio Engineering Society
LA  - en
AB  - In contrast to the conventional microphone with a moving diagram, this study explores the use of plasmas to create a diaphragmless ionic microphone. By performing FM demodulation of the shift in oscillating frequency of a high-temperature plasma, a useful audio signal was obtained. Increased output levels were observed with a decrease in the sound wave frequency. It was difficult to maintain consistent performance because the discharges in the air led to wearing of the electrode tip as well as adhesions of the discharge products. Results showed that the stability of the discharge corresponded to the nonuniform electric field, which was dependent on the formation shape of the high-temperature plasma, the shape of the discharge electrode, and the use of inert gas to protect the needle electrode. The authors review the experimental outcome of two ionic methods.
ER  -