Abstract
The piano sound is made audible by the vibration of its soundboard. A pianist pushes the key to release a hammer that strikes the strings, which transfer the energy to the soundboard, set it into vibration and the piano sound is heard due to the compression of air surrounding the soundboard. However, as piano is being played, other components such as the rims, cast-iron frame and the lid are also vibrating. This raises a question of how much of their vibrations are contributing to the sound as compared to the soundboard. To answer this question, operational transfer path analysis, a noise source identification technique used widely in automotive acoustics, is carried out on a Bösendorfer 280VC-9 grand piano. The “noise” in a piano system would be the piano sound while the “sources” are soundboard and the aforementioned components. For this particular piano, it is found out that the soundboard is the dominant contributor. However, at high frequencies, the lid contributes the most to the piano sound.
| Original language | English |
|---|---|
| Pages (from-to) | 39-47 |
| Number of pages | 9 |
| Journal | Applied Acoustics |
| Volume | 140 |
| DOIs | |
| Publication status | Published - 1 Nov 2018 |
| Externally published | Yes |
Funding
The research work presented is funded by the European Commission (EC) within the BATWOMAN Initial Training Network (ITN) of Marie Skłodowska-Curie action, under the seventh framework program (EC grant agreement No. 605867). The authors thank the Network for the generous funding and support. The research has been further supported by the Lise-Meitner Fellowship M1653-N30 and the stand-alone project P29386 of the Austrian Science Fund (FWF) attributed to Antoine Chaigne. The authors also thank Werner Goebl for his guidance on using the CEUS Reproducing System and Alexander Mayer for his contribution in setting up the experiment.
Keywords
- Operational transfer path analysis
- Piano acoustics
- Source identification
- Structural vibration