I am interested in identifying transducer technology that could be used to create a "bedding" SIDS (Sudden Infant Death Syndrom) monitor.
For example, one researcher has had some success with a water-filled pad connected to a hydrophone. An infant is placed on the pad, and breathing and heartbeat sounds are acoustically coupled into the water in the pad. The hydrophone picks up these sounds.
I'm wondering if a similar measurement system could be created without water, say, using PVDF films. For example, could a "bubble pack" array made of PVDF be instrumented with electrodes that would act similar to a water-filed pad w/ hydrophone.