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US 2021/0230346 A1Published application
Sound absorbing urethane foam
AssigneeToyo Quality One Corporation
InventorsShigeru Iwaki, Akira Sueya, Noriyuki Matsumoto
Life of this patent
Estimating the term…
Abstract
According to one embodiment, a sound absorbing urethane foam is provided. In the sound absorbing urethane foam, a normal incidence sound absorbing coefficient at a time when a diameter is 29 mm and a thickness is 10 mm is 40% or more in an entire range of frequencies of 1000 Hz to 3150 Hz.
Claims6
A sound absorbing urethane foam in which a normal incidence sound absorbing coefficient at a time when a diameter is 29 mm and a thickness is 10 mm is 40% or more in an entire range of frequencies of 1000 Hz to 3150 Hz.
Dependencies are inferred from the claim text.