MANUFACTORY / Resonance wood

We are constantly seeking to improve the sound quality of our harps by drawing on the experiences of our ancestors with regard to the provenance of the trees, felling at the most favorable period and specific debitage.

The laboratory of the Institut Fédéral de Technologie performs for us at Ecole Polytechnique de Zurich (EPFZ) very comprehensive analyzes of samples of spruce pre-selected as resonance wood. Each sample is analyzed according to the following criteria: density, elasticity modulus, speed of sound propagation, dendrochronology. The results of these analyzes make it possible to estimate the resonance coefficient and to validate or not this preselection. This scrupulous selection makes it possible to keep only the true resonant spruces, which are then sawn « on quarter » and cut into boards. These are then stored for many years in different hangars, at various altitudes and packaging. Drying takes place exclusively in air (we do not use accelerated artificial drying). They are then assembled to form the “resonance soundboards” of our instruments.