The BioSynth is a musical instrument that sonifies heartbeats and sweat release. Erin used it in her piece Song of Seven: BioChoir, and in BioSolo, an improvisation for breath/voice and sonified heart and sweat release.

The BioSynth features a Teensy board, an optical blood flow sensor and a sweat sensor. 

Biosynth - Retrieving Physiological Data

Respiration sensor

Prototyping a respiration sensor using a thermistor placed just below the nostril. The thermistor is a type of resistor whose resistance is dependent on temperature. If placed close to nostril, the temperature differences caused by breathing can be used to calculate various respiration features.