Glass Harp - pitch
Glass harp reportedly first built around 1730 in southern Germany. In the mid 18th century, became popular throughout Europe and became a common musical instrument.
Educational phase: motivation
- wine glasses
- colored water / wine
When passing your finger over the edge of the glass there is a resonance of thin glass, which then sound waves in the air. Height of the resulting tone is dependent on level, the higher the level, the lower the tone.
Then three fingers moistened rim glasses. There is a resonance of thin glass, which then form the acoustic standing waves of air. The sound of the human ear as vznímá tone of a certain frequency. The wavelength of the tone depends on the distance the free water surface and the edges of the glass.
Application in practice
Playing the glasses :)
Control issues and challenges
- Which glass is needed to expreriment work?
- This experiment can be done for example with a pint of beer?