BOOK AND FILM REVIEWS: Clear and Informative: Music, Physics and Engineering

Olson, Harry F.; Josephs, Jess J.

doi:10.1119/1.2357499

Cited by 3 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the course of the experiment the two holes played different roles: in a first phase, the upper hole was a gas inlet and was crossed by the suspension wire of the inner electrode; a bellows operated translation stage allowed the vertical positioning of the central electrode with a 1 mm resolution; the acoustic signal was recorded at the lower hole. Later, when there was evidence that the empty volume of the bellows was altering the amplitude of the resonant modes of the cavity due to the phenomenon of Helmholtz resonance [37], the height adjusting facility was abandoned and the upper hole was closed with an home made Macor electric feedthrough; the lower hole assumed then also the function of gas inlet. Two spherical internal electrodes have been used in turn: an 8 cm diameter aluminum one suspended to a 0.25 mm brass thread, and a 12. steel one hanging by a 1 mm stainless steel wire.…”

Section: Experimental Set-up and Methodsmentioning

confidence: 99%

Testing the neutrality of matter by acoustic means in a spherical resonator

et al. 2011

View full text Add to dashboard Cite

Measurements to test the neutrality of matter by acoustic means are reported. The apparatus is based on a spherical capacitor filled with gaseous SF_6 excited by an oscillating electric field. The apparatus has been calibrated measuring the electric polarizability. Assuming charge conservation in the β decay of the neutron, the experiment gives a limit of \epsilon_{p−e} <= 1 × 10−21 for the electron-proton charge difference, the same limit holding for the charge of the neutron. Previous measurements are critically reviewed and found to be inaccurate

show abstract

Section: Experimental Set-up and Methodsmentioning

confidence: 99%

Testing the neutrality of matter by acoustic means in a spherical resonator

et al. 2011

View full text Add to dashboard Cite

show abstract

“…3 Our plan was to acquire a time record of each tone. 3 Our plan was to acquire a time record of each tone.…”

Section: Subject Of Measurementsmentioning

confidence: 99%

Measuring the quality of guitar tone

Sali

Kopač

2000

Experimental Mechanics

View full text Add to dashboard Cite

A method for determining the tone quality of a classical guitar is described. The method is applied to several high-and low-quality classical guitars. In comparison to bad tones, the timbre of good tones consists of stronger consonant (pleasant) and weaker dissonant (unpleasant) intervals. This empirical criterion of tone quality is called the rule of consonance-dissonance (RC-D). The RC-D is defined mathematically and interpreted in physical and musical terms. The RC-D allows a luthier to pursue systematically the tone quality during guitar production and to improve the instrument's tone after its assembly. KEY WORDS--Acoustics, damping, instrumentsThe achievement of high tone quality is the goal of guitar makers. However, few studies have addressed the manner in which tone quality should be measured and determined. Cumpiano and Natelson 1 discussed tone but did not define tone quality in physical terms. Richardson 2 discussed the important role of the low-order modes of vibration of the stringed musical instrument. These modes are responsible for much of the sound radiation at both low and high frequencies. Because low (high) frequency normal modes radiate only at low (high) frequencies, there must be some correlation between the sound radiation of an instrument in the low and high frequency ranges. This correlation depends on the design features and the material of the instrument. Thus, the aim of our research is to determine the most important feature of a tone of a good guitar and how it can be distinguished from a bad tone. The basis for evaluation of our results was a definition of the consonance and dissonance between two tones by Olson 3 and, partially, by Sethares. 4 Two guitar samples were examined, consisting of four good and four extremely bad guitars, respectively. This paper describes the sound measurements of these two guitar samples and the analysis of tone quality differences. In addition, the frequency response function of a guitar, which depends on mechanical properties of both top and back plates, was related to its tonal quality and to low-order modes. On the basis of the results, a rule for determining guitar tone quality was proposed that, it is hoped, satisfies the criterion of objectivity.S. ~ali is a Faculty Assistant, and J. Kopa? (SEM Member) is an Associate Professor,

show abstract

Progress and Opportunities in Modelling Just-Noticeable Difference (JND) for Multimedia

Wang

Ghinea

2022

IEEE Trans. Multimedia

View full text Add to dashboard Cite

BOOK AND FILM REVIEWS: Clear and Informative: Music, Physics and Engineering

Cited by 3 publications

References 0 publications

Testing the neutrality of matter by acoustic means in a spherical resonator

Testing the neutrality of matter by acoustic means in a spherical resonator

Measuring the quality of guitar tone

Progress and Opportunities in Modelling Just-Noticeable Difference (JND) for Multimedia

Contact Info

Product

Resources

About