Compressional Relaxation with a Tuning Fork

Abstract

LETTERSTO THE EDITOR bands. The vertical lines within the bands represent the locations of the centers of the holes in the circles of the perforated disk. In order to facilitate for the reader any wish on his part to derive, for his own satisfaction, a speculative notion of why the brain reacts to such stimulation with giving to consciousness doubled or undoubled beats, I have added in the figure the common crescendo and decrescendo signs used in musical scores. For myself I ask permission to abstain from any verbalism. The reader should be aware of the following. Those signs which straddle the top parallel belong to the loudness of the tone "30" when combined with "46." Those signs which are in the upper part of the middle band belong to the loudness of the tone "46" when combined with "30." Those signs which are in the lower part of the middle band belong to the loudness of the tone "46" when combined with "15." And those signs which straddle the bottom parallel belong to the loudness of the tone "15" when combined with "46." Such relations are often called "mistuned consonances," a term which I use reluctantly because I have long ceased to accept "consonance" as a scientific term at all. We are dealing here of course with the frequency ratios 2:3 and 1:3. It is of considerable importance to keep in mind that the former is composed of an even and an odd number, whereas the latter is composed of two odd numbers. That in such combinations the higher pitch and the lower pitch invariably beat alternately has been known for a hundred years due to the magnificent observational skill of Rudolph Koenig. 9 That certain beats are doubled and others are undoubled, has

Investigations of the 1-kHz sound absorption in sea water

“…Only the resonator technique developed by Leonard (1950) and Kurtze and Tarnm (1953) give acceptable sound absorption data at frequencies below the megahertz range. The tuning fork resonator proposed by Andreae, jupp and Vincent (1960) would appear to be optimum for the 1 kHz region but the accuracy of the method is not presently acceptable and the concentration of solutions used is higher than that desired in this work. The largest spherical resonator previously used was a 350 liter glass sphere with a fundamental radial mode of oscillation of approximately 3 kHz.…”

“…The major problem would be modifying the suspension system of the vessel to take the added weight of water. From an engineering standpoint, the easier thing to do would be to refine the tuning fork system used by Andreae, Jupp and Vincent (1960) so that good data can be obtained at low solution concentration.…”

Investigation of the 1kHz sound absorption in sea water

“…Equating equations (2)(3)(4)(5)(6)(7)(8)(9)(10)(11) and (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12), inserting equation (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13) Leonard (1950) and Kurtze and Tamm (1953) give acceptable sound absorption data at frequencies below the megahertz range. The tuning fork resonator proposed by Andreae, Jupp and Vincent (1960) Strehlow and Becker (1959) Gilkerson (1957Gilkerson ( , 1962 proved to be unreproducible. Bell and Robinson (1962) The work of Baker (1961), Prasad (1964) and Kalnins (1964) Leonard (1950) and Wilson (1951) After the sphere had been sealed, it was raised off its support structure by piano wires to reduce external loss of sound energy outside the resonator.…”