Stretchable band - type transducer particularly suited for use with respiration monitoring apparatus

A band securable about an expandable three-dimensional object comprising:

• a first strip of self-adherent elastic material;
• an electrical conductor disposed on top of the first strip of elastic material in a pattern such that when secured to the first strip, the conductor is extended lengthwise during lengthwise stretching of the first strip of elastic material;
• a second strip of said self-adherent elastic material disposed on top of the first strip of elastic material thereby securing said first and second strips of elastic material to each other with said conductor sandwiched therebetween thereby defining a sandwich comprising said first and second strips of material and said conductor, said sandwich having first and second free ends;
• and
• means for securing said first and second free ends of said sandwich to each other for securing said band about said expandable three-dimensional object for forming a close-fitting, continuous loop thereabout.