E.F.F. Chladni’s experiments and observations with sound and vibrations profoundly influenced the development of the field of Acoustics. The famous Chladni diagrams along with other observations are contained in Die Akustik, published in German in 1802 and Traité d’Acoustique, a greatly expanded version, published in French in 1809. This is the first comprehensive translation of the expanded French version of Traité d’Acoustique, using the 1802 German publication for reference and clarification. The translation was undertaken by Robert T. Beyer, PhD (1920-2008), noted acoustician, Professor of Physics at Brown University, and Gold Medal recipient of the Acoustical Society of America. Along with many other projects completed over the course of his career, Dr. Beyer translated Von Neumann’s seminal work, Mathematical Foundations of Quantum Mechanics from the original German, spent 30 years translating Russian physics treatises and journals, served as editor of the English translation of the Soviet Journal of Experimental and Theoretical Physics, and also authored Sounds of our Times: Two Hundred Years of Acoustics.

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Este libro historico puede tener numerosos errores tipograficos y texto faltante. Los compradores pueden descargar una copia gratuita escaneada del libro original (sin errores tipograficos) desde la editorial. No indexado. No se muestra. 1809 edition. Extracto: ...varie la maniere d'operer, en serrant, en touchant la plaque, en l'appuyant, ou en la posant sur des petits chevalets de liege, et en appliquant l'archet a differens endroits, etc., on reussira souvent a produire des figures compliquees assez exactes. Mais il faut bien observer que l'archet ne remue pas a droite ou a gauche, et que le degre de pression et de la vitesse du mouvement de l'archet reste le meme, pour que le son ne change pas, et pour que la figure se montre assez prononcee..., I29 Pour comparer les nombres des flexions des lignes circulaires, je les reunirai dans la Table suivante: On verra, qu'ordinairement le nombre des flexions sies lignes circulaires n'a pas un tel rapport au a1ombre des lignes diametrales, que l'un puisse etre jdivise par d'autre, ou qu'il existe un diviseur commun; par consequent il n'y a point de symetrie parfaite dans ces figures. C'est ce qui rend les figures difficiles a dessiner; si l'on voulait donner aux lignes diametrales la meme position a l'un et a l'autre cote, ies flexions deviendraient trop inegales; mais si l'on voulait donner a toutes les flexions la meme grandeur, la position des lignes diametrales serait trop peu symetrique, et dans ces deux cas la figure ne serait pas comme la nature la donne, ou chaque ligne nodale cede a l'autre, et ou chaque partie vibrante a la grandeur convenable pour etre en equilibre avec toutes les autres. Par consequent ces figures semblent etre plus symetriques qu'elles ne le sont reellement. Sur la plaque de...

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