Abstract: An apparatus includes a sensor configured to detect a variable characteristic, the variation of the characteristic including variation indicative of an individual swallowing when the sensor is positioned in a neck area of the individual. The apparatus includes a wireless data communication interface configured to receive information related to the characteristic and transmit the information externally. The sensor may be, for example, an acoustic sensor, a piezoelectric sensor, a capacitive sensor, or a pressure sensor. The apparatus may include a sensor interface to sample a signal from the sensor and provide data related to the signal for transmission externally. A system may use the information related to the characteristic to identify eating habits and type of food eaten. Feedback may be provided to the individual to help the individual change their dietary intake and habits.