A comprehensive database of 25 subjects in-ear physiological signals has been created by researcher Alexis Martin from the EERS-ÉTS Industrial Reserach Chair in In-Ear Technologies, and is available, upon request to Prof. Voix, for other researchers.
A free sample of the database, provided as a Matlab binary file, is available for download, and contains the following test conditions:
A1, A2, A3, A4, A5 = apnea
A6E, A7E = apnea after exercise
NP = deep nose breathing
NN = normal nose breathing
NR = fast nose breathing
NE = normal nose breathing after exercise
BP = deep mouth breathing
BN = normal mouth breathing
BR = fast mouth breathing
BE = normal mouth breathing after exercise
A scientific journal publication detailling all test procedure is soon to be made available too.