Sound muffling headwear
A headband, cap, hat, or the like worn by a child, particularly an infant, includes an embedded sound-attenuation system to protect hearing against loud sounds that might startle, awaken, or injure a wearer. Shells formed of a comparatively soft and flexible elastomeric material are secured against the head of a user, each enclosing an ear in an air tight chamber, to close down the transmission paths available to sound waves. The shells are impervious to air, and flexible to conform to the head when secured by the headgear in which the shells are embedded. Each shell is provided with a rim, sufficiently flexible to deform and deflect into complete, sealed contact with the head.
1. A method for protecting hearing of an infant, the method comprising:
providing headgear containing an earmuff, the earmuff being formed to have a she portion, a liner portion contained completely within the shell portion, a housing portion covering the shell portion, and a contact layer inside the shell portion, wherein the she portion is formed of an elastomeric polymer material sized and shaped to deflect in bending in response to compressive forces imposed by the housing and wherein the contact layer is configured to make physical contact with an ear of a wearer;
placing the earmuff over the ear of the wearer by placing the headgear on the head of the wearer;
securing the earmuff against the head of the wearer by the compressive forces exerted by the housing toward the wearer; and
conforming the she to the shape of the head of the wearer in response to the compressive forces exerted by the housing.
2. The method of claim 1 , wherein the contact layer is formed of a material configured to and selected to deflect in response to pressure exerted by the ear of the wearer.
3. The method of claim 1 , further comprising deflecting by a rim of the housing in response to tensioning of the housing.
4. The method of claim 1 , further comprising forming, by a rim of the housing, a sound-resistant seal between the rim and the head of the wearer.
5. The method of claim 1 , comprising blocking, by the shell, sound propagated from the environment surrounding the wearer against impingement upon the eardrum of a user.
6. The method of claim 1 , wherein the shell comprises an outer wall, an offset wall, a rim, and a flange, all formed continuously, contiguously, and homogeneously of a single material.
7. The method of claim 6 , wherein the single material of the shell is selected to have a deflection within the shell selected to conform to the head of the wearer comfortably.
8. The method of claim 6 , wherein the material of the shell is selected to be impervious to passage of fluid therethrough, and the offset wall and the outer wall are formed to have approximately a single constant wall thickness, the rim thereof configured to bend in response to pressure exerted thereagainst from a surface of the skin of the wearer.