The relationship between final hammer velocity and maximum amplitude of radiated piano sound was investigated. Piano tones with varying hammer velocities were produced by a computer-monitored acoustic piano containing optical sensors and solenoids, and the sounded tones were recorded and digitized for analysis. Maximum amplitudes over the duration of the sounded tones were linearly proportional...

in this paper, after collecting the rock samples from eight mines and one high way slope, the tests for determination of dry density, uniaxial compressive strength, tensile strength (brazilian test), elastic modulus, schmidt hammer rebound number have been done on samples. in addition, in order to calculating the mean size of rock grains, quartz content, hardness and abrasivity, a thin sections...

To determine the factors having greatest impact on risk of occurrence water hammers in above-ground installation pipelines, typical permafrost areas. Determine velocities shock wave front propagation steel pipes for different types pipes. calculate parameters possible hammer depending pipeline wall thickness. Methods: Method characteristics used solution differential equations unsteady motion l...

equipment driven by the printer. When the two codes compare, the hammer is en~r­ gized. The important thing is to get the print hammer thyratron fired at the right time. As long as the sum total of all the operations you do beforehand achieves that, you get the right character. Lt. R. S. Weinberg (Air Materiel Command, United States Air Force): Can you relate something of the service experience...