Michiaki Ariga Yoshikazu Yano Shinji Doki Shigeru Okuma Mental tension detection in the speech based on physiological monitoring. 2022-2027 2007 SMC https://doi.org/10.1109/ICSMC.2007.4414150 conf/smc/2007 db/conf/smc/smc2007.html#ArigaYDO07