High attenuating earmuff device
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United States of America Patent
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N/A
Issued Date -
Dec 29, 2005
app pub date -
Jan 24, 2005
filing date -
Jan 23, 2004
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
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 moderately 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 earmuff liner including the respective first and/or second foams, are also provided.
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