Mazda Motor Corporation

Naoko Yorozu

Eiji Murasawa

Masanori Honda

Tsuyoshi Sugihara

Tetsunori Hada

Chie Fukuhara

Takao Maruko

Yuki Nakatani

A floor carpet is placed on a floor panel forming a cabin floor surface. The floor carpet comprises a skin layer which is configured to block an airflow therethrough and a sound-absorption layer which is made of a sound-absorption material and configured to allow an airflow therein, the sound-absorption layer being provided below the skin layer to contact the floor panel at a lower face thereof. A space between the skin layer and the floor panel (a space portion where the sound-absorption layer is arranged) is sealed with a seal member which is configured to surround the sound-absorption layer. The seal member is pressed against the floor panel (tightly) by a pressing member which is fixed to a vehicle-body side with a fixing tool.

Noise insulation structure of cabin floor

Disclosed is a sound-absorbing material, which has a flow resistivity R of 3.3&#xd7;10N&#xb7;s/mor more, a Young's modulus E of 1.2&#xd7;10to 2.0&#xd7;10N/m, and a loss factor &#x3b4; of 0.12 or less. The sound-absorbing material of the present invention can enhance a sound absorption capability in a wide range of a low/intermediate-frequency region to a high-frequency region at a higher level as compared with conventional sound-absorbing materials.

Sound-absorbing material, production method for sound-absorbing material, and sound-absorbing structure

Growing community of inventors

Hiroshima, Japan

Naoko Yorozu