Acoustic Property and Hardness of Coatings for Musical Instruments with Various Coating Thicknesses

  • Hwang, Hyeon-Deuk (Lab. of Adhesion & Bio-Composites, Major in Environmental Materials Science, Seoul National University) ;
  • Lee, Byoung-Hoo (Lab. of Adhesion & Bio-Composites, Major in Environmental Materials Science, Seoul National University) ;
  • Choi, Jae-Hoon (Lab. of Adhesion & Bio-Composites, Major in Environmental Materials Science, Seoul National University) ;
  • Kim, Hyun-Joong (Lab. of Adhesion & Bio-Composites, Major in Environmental Materials Science, Seoul National University) ;
  • Chung, Woo-Yang (Department of Wood Science and Engineering, Chonnam National University)
  • Received : 2005.11.05
  • Accepted : 2005.12.01
  • Published : 2006.03.25

Abstract

The relationship between acoustic property and coating hardness of musical instruments was investigated using a sound level meter and a pendulum hardness tester. Urethane topcoat, oil stain, natural oil varnish, and UV-curable epoxy acrylate coatings were applied on four different substrates: Paulownia coreana, Pinus koraiensis, Castanea crenata var. dulcis and Pinus densiflora. The influence of the coating type on the acoustic properties was stronger than that of the substrate. In the case of an oil stain formed with tacky coating layer, the sound pressure level (SPL) and surface hardness decreased with increasing of coating thickness. In the other coatings, SPL decreased and hardness increased as the coating layer thickened. However, SPL began to increase again at coating thickness above $100{\mu}m$.

Keywords

Acknowledgement

Supported by : Agricultural R&D Promotion Center

References

  1. Choi, J.-H., B.-H. Lee, H.-J. Kim, and W.-Y. Chung 2005. Viscoelastic and acoustic characterization of coatings for stringed instruments. Mokchaekonhak 33(4): 15-22
  2. Chung, W.-Y. and W. Kang, 2003. Acoustical environment and wood science, Mokchaekonhak 31(2): 1-15
  3. Dunlop, J. I. 1978. Damping loss in wood at mid kilohertz frequencies. Wood Sci. Technol. 12: 49 -62 https://doi.org/10.1007/BF00390010
  4. Dunlop, J. I. 1989. The acoustic properties of wood in relation to stringed musical instruments. Australian Acoustic Society 17(2): 37 -40
  5. 5. Dunlop, J. I. and M. Shaw. 1991. Acoustical properties of some australian woods. Catgut. Acoust. Soc. J. 1(7): 827 - 830
  6. Eller, D. P., J. A. Scardo, A. E. Dillon, A. J. Klein, S. L. Stramm, and R. B. Newman. 1995. Distance from an intrauterine hydrophone as a factor affecting intrauterine sound pressure levels produced by the vibroacoustic stimulation test. Am. J. Obstet Gynecol. 173(2): 523 - 527 https://doi.org/10.1016/0002-9378(95)90277-5
  7. Fahy, F. J. 1995. Sound intensity. Chapman & Hall. pp. 38-61
  8. Hall, D. E. 1993. Basic acoustics. Harper & Row. pp. 7-13
  9. Jung, H.-J. and T.-K. Yoo. 1999. Effects of saligenin treatment on acoustical properties and adsorption of soundboard for traditional musical instruments. Mokchaekonhak 27(3): 7 - 16
  10. Kim, J.-N., D.-H., Yoo, K.-H. Park. 1998. Interior noise reduction for subway railroad vehicles. Proceeding of Korean Society for Railway pp. 265-272
  11. Kim, Y. T., Y. B. Lee, and M. J. Jho. 2003. A fast automatic calibration system for a sound level meter in an anechoic room. Applied Acoustics 64: 459-470 https://doi.org/10.1016/S0003-682X(02)00107-X
  12. Narn, J.-W., J.-S., Park, and J.-J. Lee. 2002. Evaluation of impact sound insulation properties of light-framed floor with radiant floor heating system, Mokchaekonhak 30(3): 75 - 84
  13. Park, H.-G., B.-J. Park, and M.-S. An. 1999. The analysis of acoustic environmental in courtyard of apartment; a study of sound pressure level. Engineering Research 30: 177-183
  14. Rossing, T. D. 2002. The science of sound. Addison-Wesley Pub. Co. pp. 85 - 137
  15. Speaks, C. E. 1996. Introduction to sound: acoustics for the hearing and speech sciences. Singular Publishing Group Inc. pp. 131- 184
  16. Soeta, Y., K. Ohtori, K. Fujii, and Y. Ando. 2001. Measurement of sound transmission by hall doors. J. Sound and Vibration 241(1): 79-86