Ambulatory Voice Monitor

While at MIT Lincoln Laboratory, I created a lightweight, on-body, wireless system designed for monitoring real-world voice characteristics and behavior. The system has the potential to provide important assessments of voice and speech disorders, psychological and emotional state, and the impact of environmental sound levels. The system’s transmitter is positioned on the neck and synchronously streams dual-channel sensor data from an on-board MEMS microphone and a high bandwidth accelerometer, which acts as a noise-robust and confidential contact microphone. These data are recorded to a receiver that can store the data locally and stream a real-time feed to a computer. 

Ambulatory Noise Monitor


Ambulatory Noise Monitor Receiver



  1. C. Chwalek, D. D. Mehta, et al., “Lightweight, On-Body, Wireless System for Ambulatory Voice and Ambient Noise Monitoring,” in IEEE 14th International Conference on Wearable and Implantable Body Sensor Networks (BSN), 2017.
  2. D. Mehta, P. C. Chwalek, T. F. Quatieri, and L. J. Brattain, “Wireless neck-surface accelerometer and microphone on flex circuit with application to noise-robust monitoring of Lombard speech,” Proceedings of Interspeech, pp. 684-688, 2017.
  3. J. Brattain, R. Landman, K. A. Johnson, P. Chwalek, J. Hyman, J. Sharma, et al., “A multimodal sensor system for automated marmoset behavioral analysis,” in IEEE 13th International Conference on Wearable and Implantable Body Sensor Networks (BSN), 2016, pp. 254-259.