This paper investigates the audibility of longitudinal components in piano string vibrations with listening tests. The recorded fortissimo sounds of two grand and one upright pianos have been resynthesized with and without longitudinal components and used in ABX type listening tests. Results suggest that the longitudinal components are audible up to note C(5). However, a second test seeking the...

To understand how the inner ear-generated sound, i.e., otoacoustic emission, exits the cochlea, we created a sound source electrically in the second turn and measured basilar membrane vibrations at two longitudinal locations in the first turn in living gerbil cochleae using a laser interferometer. For a given longitudinal location, electrically evoked basilar membrane vibrations showed the same...

An experimental program is described in which the bending and longitudinal dynamics of structures simulating solid-propellant rocket motors are being studied. The structure is considered to be a cylindrical grain of solid propellant to which is bonded a thin steel case. Vibrations of the empty steel cylinder suspended in a free-free condition are studied first. Secondly, a similar steel cylinde...

We model a exible robot arm supported at a prismatic joint so the length of (the relevant part of) the rod is variable | indeed, this variation in the length of the arm is taken to be the control action. The principal results are: exact controllability for the consideration of purely longitudinal vibrations (wave equation) and the existence of optimal controls in the more practically interestin...

The effect of the inertia term on longitudinal displacements an underground pipeline is shown for various cases pipe fastening when a seismic wave propagates along its axis. problem solved by analytical and numerical methods. pipe-soil interaction assumed to be elastic (shear stress generated in soil proportional relative displacement between soil).

Recent studies on train passengers’ activities found that many passengers were engaged in some form of work, e.g., reading and writing, while traveling by train. A majority of the passengers reported that their activities were disturbed by vibrations or motions during traveling. A laboratory study was therefore set up to study how low-frequency random vibrations influence the difficulty to read...

The problems of vibrations structural elements still remain demanded due to the widespread use polymeric and composite materials also necessity consideration a damage factor. Mathe¬ma¬tical difficulty many-dimensional led emergence one-dimensional theories, approximately taking into account non-unidimensionality movement. In present paper, based on Rayleigh core theory, we solve problem finite ...