Method of modifying the frequency response of a wooden article

G - Physics – 10 – D

Patent

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G10D 1/00 (2006.01)

Patent

CA 2732977

A method for modifying the frequency response of a wooden article by exciting the article with acoustic energy. Frequency response is the measure of a system's spectrum response at the output to a signal of varying frequency but constant amplitude at its input. The acoustic energy includes at least one excitation frequency which is preferably in the audible spectrum (20 to 20,000Hz). The use of acoustic energy from the remote source provides non-contact excitation of the wooden article. In one embodiment, the acoustic energy is at least one sound wave that includes at least one resonant frequency of the wooden article, at least one acoustic mode of the wooden article, at least one discrete broadband frequency, and a composite frequency including any combination of multiple broadband frequencies, white noise and pink noise.

L'invention porte sur un procédé de modification de la réponse fréquentielle d'un article en bois par excitation de l'article avec une énergie acoustique. Une réponse fréquentielle est la mesure d'une réponse spectrale du système au niveau de la sortie à un signal de fréquence variable mais d'amplitude constante au niveau de son entrée. L'énergie acoustique comprend au moins une fréquence d'excitation qui est, de préférence, dans le spectre audible (20 à 20 000 Hz). L'utilisation de l'énergie acoustique à partir de la source distante fournit une excitation sans contact de l'article en bois. Dans un mode de réalisation, l'énergie acoustique est au moins une onde sonore qui comprend au moins une fréquence de résonance de l'article en bois, au moins un mode acoustique de l'article en bois, au moins une fréquence large bande discrète et une fréquence composite comprenant toute combinaison de multiples fréquences large bande, de bruit blanc et de bruit rose.

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