Abstract
A speaker is a two-port audio system which produces sound through electromechanical operations. It transforms electric voltage signals into audible sound signals. Almost all speakers available are three dimensional. These days, many mobile electronic devices such as mobile phones have become smaller and thinner. A problem with this miniaturization, however, is that the volume of the speakers has also decreased. In contrast to conventional three dimensional speakers, there have been several attempts to develop two dimensional speakers using piezoelectric materials. The main parts have been piezoelectric films, conductive macromolecular coating materials, and electrodes. An improved material that have been used is that used indium tin oxide in place of conductive macromolecular coating materials. We have invented a new type of two dimensional flexible speaker by applying carbon nanotube in order to replace indium tin oxide. The speaker system we have designed shows outstanding advantages, such as flexibility, wide ranges of operating frequencies, and low values impedance values, and stability.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
MSIUSA.com, Piezo Film Sensors, Technical Manual, Measurement Specialties, Inc. (1999)
Gautschi, G.: Piezoelectric Sensors, pp. 1–45. Springer, Heidelberg (2002)
Researchers find replacement for rare material indium tin oxide (online). R&D Magazine (Advantage Business Media) (April 11, 2011), http://www.rdmag.com/News/2011/04/Materials-Researchers-find-replacement-for-rare-material-indium-tin-oxid/ (retrieved April 11, 2011)
Kyrylyuk, A.V., Hermant, M.C.,Schilling, T., Klumperman, B., Koning, C.E., van der Schoot, P.: Controlling electrical percolation in multicomponent carbon nanotube dispersions, Nature Nanotechnology (Nature Publishing Group): Advance Online Publication (April 10, 2011), http://www.nature.com/nnano/journal/vaop/ncurrent/full/nnano.2011.40.html (retrieved April 11, 2010)
Wang, X., Li, Q., Xie, J., Jin, Z., Wang, J., Li, Y., Jiang, K., Fan, S.: Fabrication of Ultralong and Electrically Uniform Single-Walled Carbon Nanotubes on Clean Substrates. Nano Letters 9(9), 3137–3141 (2009)
Martel, R., Derycke, V., Lavoie, C., Appenzeller, J., Chan, K.K., Tersoff, J., Avouris, P.: Ambipolar Electrical Transport in Semiconducting Single-Wall Carbon Nanotubes. Physical Review Letters 87(25), 256805 (2001)
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2011 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Kang, JJ., Um, K. (2011). Carbon Nanotube as a New Coating Material for Developing Two Dimensional Speaker Systems. In: Kim, Th., Adeli, H., Robles, R.J., Balitanas, M. (eds) Advanced Communication and Networking. ACN 2011. Communications in Computer and Information Science, vol 199. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-23312-8_58
Download citation
DOI: https://doi.org/10.1007/978-3-642-23312-8_58
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-23311-1
Online ISBN: 978-3-642-23312-8
eBook Packages: Computer ScienceComputer Science (R0)