Yazaki Corporation

Shingo Katoh

Yasuhiro Kominato

A method for manufacturing a grommet, which is fixed to a wire harness W inserted into an opening portion of a panel P and which is fitted and attached to the opening portion to thereby support the wire harness W on the panel P. The grommet includes peripheral walls that surrounds the wire harness W to form a sound shield space S around the wire harness W, and a soundproof wall that is formed in the sound shield space S so as to cross a longitudinal direction of the wire harness W. The soundproof wall is designed by use of an expression of TL=20 log(&#x3c1;&#xd7;f)&#x2212;42.5 where TL designates transmission loss of the soundproof wall, &#x3c1; designates surface density of the soundproof wall, and f designates a frequency.

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Shizuoka, Japan

Shingo Katoh