| 摘要 |
<p>An earmuff device is provided, including a connecting band having opposing first and second ends, a pair of earmuff cup assemblies connected to the opposing first and second ends of the connecting band, a first foam disposed at the earmuff cup assemblies, and a second foam disposed at the earmuff cup assemblies, where the first foam comprises a moderately high density foam having highly engineered polymer transition properties with precise loss factor values, modulus values, and polymer transition values and maximum damping at prescribed temperature and frequency conditions, and where the second foam comprises a rnoderately high density hydrophilic foam particularly employed for optimal property convergence in cell size, air flow, density, and static stiffness. An earmuff cup, an earmuff cushion, and an earrnuff liner including the respective first and/or second foams, are also provided.</p> |
