If the productive force of music has expired in the phonograph records, if the latter have not produced a form through their technology, they instead transform the most recent sound of old feelings into an archaic text of knowledge to come.
Le concept à été le sujet d'une thèse sur Detroit mais le concept est déjà battu en brèche pour 2 raisons: le modèle est difficilement exportable hors des États-Unis et les villes ciblées ne correspondent déjà plus au concept.
He passed away in the night of 3 to 4 April. Napoleon was also interested in a demonstration of Chladni's experiments and invited him to the Tuilerie Palace through the mediation of Laplace. Ernst Friedrich could only leave his study room after his permission; couldn't go even to their garden other than accompanied by his mother; and was not allowed to have any friends. The group of so-called ‘acousticians’ included Chladni, Young, Félix Savart, Colladon, Faraday, Charles Wheatstone, Lissajous, Tyndall, Koenig, A. Mayer, etc.
The sounds may be prolonged at pleasure, with all the gradations of Chladni was initially ridiculed for his claims of an outer space origin for meteorites, but the important minds of his period agreed with this view, including Lichtenberg and Humboldt, and his writings sparked scientific curiosity that eventually led more researchers to support his theory.
88ff.
Wittenberg was besieged by the Prussians, so Chladni was compelled to move to a dwelling with a single room in the small town of Kemberg, situated 15 km to the south of his home town (where he was visited in 1821 by Felix Mendelssohn-BartholdyIn Munich, Chladni met Joseph von Fraunhofer, a physicist who sparked his interest in optics.During a stay in Berlin in 1825 Chladni met the architect Carl Theodor Ottmer, who showed him his drafts for the new building of the Singakademie in Berlin (today Maxim Gorki Theatre). He also performed a series of experiments with liquid glycerin in water and light refracted in a single drop of water containing fine particles that reflect the light source, in a series of experiments that yielded his most famous images (see cover of his book).
In 1783–92 he gave lectures, first on legal subjects, from 1784 on geometry and mathematical geography, and from 1786 in his real field of research, acoustics.He moved to acoustics as a relatively underexplored scientific field at the time.First Chladni investigated transversal vibrations of rods with different boundary conditions. Hooking them up to amplifiers and frequency generators, the crystals functioned as transducers, converting the frequencies into vibrations that were strong enough to set the plates into resonance. Thus Chladni discovered longitudinal vibrations (or dilatational vibrations) of bodies. But this language is in fact the most ordinary language, the Ur-alphabet in which creation was, as it were, spelled out.
Mešterová, Jana (2006).
Emergent Coastline A shoreline resulting from a rise in land surface elevation relative to sea level.
When Chladni investigated cylindrical rods, he discovered their torsional vibrations. C'est un souci fréquent dans les programmes actuels (par exemple, en histoire avec l'idée des révolutions atlantiques mais je ne suis pas très calé sur le sujet).C'est une drôle de définition, "un camp est un endroit où l'on emprisonne des gens qui travaillent", non ?Je trouve la distinction un peu spécieuse également, parce que je ne l'ai jamais vue dans l'historiographie (maigre) que j'ai eu entre les mains sur le sujet. This source intimately influenced Chladni's work on instrument making. In the 19th century, Wilhelm Weber and Guillaume Wertheim, as well as many other investigators, devised related ways to preserve the traces of styluses attached to sounding bodies, such as rods and tuning forks.The research of Chladni figures in the 1810s–20s by the physiologist Towards the end of the 19th century, the identification of recording instruments and graphs with language became less obvious, but the association was not entirely lost. The evening before his death he met the mineralogist Henrik Steffens who reported on this meeting in his memoirsHe gave a detailed survey of his life in the introduction to the French edition of Goethe, who himself was often criticized for his diverse study of natural sciences, wrote in 1817: "Who will criticize our Chladni, the proud of the nation? Chladni assumed the coexistence of After Chladni's audience to Napoleon in 1808, he encouraged the Paris Academy of Sciences to announce a prize of 3,000 Francs for mathematical explanation of Chladni figures, particularly "to give the mathematical theory of the vibration of an elastic surface and to compare the theory to experimental evidence", which then spurred a plethora of research in waves and acoustics. He pioneered the use of laboratory grown piezoelectric crystals, which were quite costly at that time.
If the diameter or the tension of the string is changed there are only negligible variations of the frequency for the longitudinal vibrations. German philosophers such as Friedrich Nietzsche, Walter BenjaminNietzsche had referred to the sound figures in his "One can imagine a man who is quite deaf and has never had a sensation of tone and of music; just as this man will possibly marvel at Chladni's sound figures in the sand, will discover their cause in the vibrations of the string, and will then proclaim that now he knows what man calls 'tone'; even so does it happen to us all with language. At the age of 7 he was already reading scientific books, studied stars and maps, secretly learning Dutch, and dreamt about becoming a seafarer.From May 1771 to March 1774 he visited the boarding-school [Landesschule] of St. Augustinus at Grimma near Leipzig.
Franklin's armonica inspired several other instruments, including two created by Chladni.
He quickly came to be known as a "traveling scientist", and used the visits of various cities to acquire new contacts among scientists but also to study various materials on acoustics in its libraries and archives. Chladni found that the frequencies are reciprocal to the length of the string or the rod.
Je le trouve souvent trop complexe et inutile pour des gamins de 12/14 ansJe ne comprends pas certaines affirmations ici.
Around that time he changed his surname from Chladenius to Chladni. "Szendy, Peter (2008).
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