High attenuating earmuff device

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.

1 . An earmuff device, comprising: 
 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;    wherein 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    wherein 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.    
     
     
         2 . The earmuff device of  claim 1 , wherein the pair of earmuff cup assemblies each comprise a cushion for contacting the wearer, the cushion comprising the first foam.  
     
     
         3 . The earmuff device of  claim 1 , wherein the pair of earmuff cup assemblies each comprise a liner disposed at an interior thereof, the liner comprising the second foam.  
     
     
         4 . A cushion for an earmuff assembly, comprising: 
 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.    
     
     
         5 . A liner for an earmuff cup, comprising: 
 a moderately high density hydrophilic foam particularly employed for optimal property convergence in cell size, air flow, density, and static stiffness.    
     
     
         6 . An earmuff cup, comprising: 
 a body portion;    a cushion extending from the body portion for contacting a wearer; and    a liner disposed at an interior of the body portion;    a first foam disposed at the cushion, the first foam comprising 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    a second foam disposed at the liner, the second foam comprising a moderately high density hydrophilic foam particularly employed for optimal property convergence in cell size, air flow, density, and static stiffness.