To enable to detect a plurality of organism signals by simple equipment with low noise.

This throat vibration sensor 11 is equipped with a band shaped elastic body 2 surrounding a neck or a head and having both ends to approach a throat and acceleration sensors on both ends of the elastic body 2. The acceleration sensors abut on a throat to detect the organism vibration generating at the throat and output vibration signals. An extraction circuit which received the vibration signals performs frequency analysis and separates them into voice signals, pulse signals, and other components (such as respiration signals).