テーブルトップ上のカップのずり摩擦音と表面物性(<小特集>木質材料小特集)

概要

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Sliding of a coffee cup and a dish on table top emits the friction sound.This paper deala with the effect of the composition of table top and physical qualities of the usrface on the sound level of the friction sound and the mechanism sheets were overlaid,and an ethylene-propylene rubber sheet was also sandwiched as an absorbing material between surface material and base boards(plywood and particle board). The results obtained are as follows : (1) The power spectrum of the friction sound is composed of tap tone and noise components. (2) The regression analysis shows that the sound level can be represented quantitatively by the apparent surface hardness and the interval of surface roughness. (3) Synthesizing of the friction sound from tap tone of a board shows that the friction sound originates from the collision of the projection at the bottom surface of a cup and that of a board. This is the reason why the power spectrum of the friction sound resembles that of the tap tone. (4) In order to reduce the sound level of friction sound the followings are effective : the surface is not so hard, the sandwiching of absorbing sheet reduces apparent hardness and the sound level, and the surface roughness is not so flne.
社団法人日本材料学会の論文
1990-09-15