responsive to the presence of an alternating current yet not be sensitive to water gain or loss from ambient temperature or humidity conditions for example as shown in fig1 a composite 10 may include an organo salt 12 that is dispersed within a polymeric material 14 if the organo salt 12 has crystallized out of the polymeric material or has bloomed to the surface then the salt is not compatible with that given polymer thus the non homogenous system will not respond to pick up the alternating current signal if on the other hand the salt becomes dissolved within the polymeric material rendering the polymeric material clear then the two materials are compatible and a substantially homogenous mixture exists to form the desired alternating current responsive blend when the salt is compatible with the polymer blend it responds to the rise of an alternating current signal by orienting with the field then returning to a ground state with the collapse of the alternating current field by responding to the presence of an electric field therefore the composite acts as a capacitor in coupling the signal within a patient to a sensor a suitable combination of polar material and polymeric material may be identified by the following procedure first a polar material is combined with the polymeric material in about five different concentrations typically between about 5 to about 45 by weight then the adhesive salt composite is drawn onto a release liner of about 1 5 mil and permitted to dry and cure the surface of the composite is then inspected.