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

摘要

Disclosed is a sound-absorbing material, which has a flow resistivity R of 3.3 × 10 4 N · s/m 4 or more, a Young's modulus E of 1.2 × 10 3 to 2.0 × 10 4 N/m 2 , and a loss factor ´ 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.