Noise attenuating insulated heat shield

A heat shield for an under-the-hood vehicular engine component comprising three layers;

• an outer metal layer, an insulation layer, and an inner metal layer adapted to be positioned directly proximal to a shielded component;
• said insulation layer positioned intermediately between said metal layers, said layers collectively providing thermal insulation of, and reduced noise transmission from, said component, said heat shield further comprising at least one bolt aperture to facilitate attachment of said shield to a shielded component, wherein said aperture is surrounded by at least one convex undulation defining a circumferential protuberance spaced uniformly about said aperture of said heat shield.

A heat shield for an under-the-hood vehicular engine component comprising three layers:

• an outer metal layer, an insulation layer, and an inner metal layer adapted to be positioned directly proximal to the shielded component, said insulation layer positioned intermediately between said metal layers, said layers collectively providing thermal insulation of, and reduced noise transmission from, said component, and wherein said heat shield further comprising at least one bolt aperture to facilitate attachment of said shield to a shielded component, wherein said aperture is surrounded by at least one convex undulation defining a circumferential protuberance spaced uniformly about said aperture of said heat shield, and further wherein said component comprises an exhaust manifold fixed to engine, adapted to carry hot engine gases away from said engine.

A heat shield for an under-the-hood vehicular engine component comprising three layers:

• an outer metal layer, an insulation layer, and an inner metal layer adapted to be positioned directly proximal to the shielded component, said insulation layer positioned intermediately between said metal layers, said layers collectively providing thermal insulation of, and reduced noise transmission from, said component, wherein said heat shield further comprising at least one bolt aperture to facilitate attachment of said shield to a shielded component, wherein said aperture is surrounded by at least one convex undulation defining a circumferential protuberance spaced uniformly about said aperture of said heat shield, wherein said component comprises an exhaust manifold fixed to engine, adapted to carry hot engine gases away from said engine, and wherein said inner metal layer directly adjacent said shielded component is adapted to reflect heat back to the shielded