Pyro/piezo sensor with enhanced sound response

A combination thermal and vibration sensor comprising:

• (a) a plastic film exhibiting pyroelectric and piezoelectric properties and having a predetermined shape configuration with first and second major surfaces wherein the predetermined shape configuration includes a generally rectangular midsection with integrally formed obliquely extending arms with a loop disposed between said arms, the arms and the loop projecting from a first end edge, and integrally formed laterally extending legs projecting from a second end edge;
• (b) a thin layer of conductive material disposed on and coextensive with the first and second major surfaces;
• (c) first and second elongated conductive leads individually connected at a first end thereof to the conductive material on the first and second major surfaces;
• and
• (d) a layer of a material for changing the thermal mass of the sensor adhered to the layer of conductive material on at least one of the first and second major surfaces so as to overlay only a predetermined portion of the at least one major surface and leaving said loop free of the layer of material for changing the thermal mass.