| http://www.w3.org/ns/prov#value | - As shown in FIG. 22 the sleeve 70 may include an integral shield 75 formed by an air filled double layer membrane or other wave dampening material such that the area above the reflector 15 or transmission zone directly under the outer membrane 3 is a single layer 76 not shielded, but other areas such as the back and sides of the device are shielded.
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