Precision wearable accelerometer contact microphones for longitudinal monitoring of mechano-acoustic cardiopulmonary signals
Abstract
Mechano-acoustic signals emanating from the heart and lungs contain valuable information about the cardiopulmonary system. Unobtrusive wearable sensors capable of monitoring these signals longitudinally can detect early pathological signatures and titrate care accordingly. Here, we present a wearable, hermetically-sealed high-precision vibration sensor that combines the characteristics of an accelerometer and a contact microphone to acquire wideband mechano-acoustic physiological signals, and enable simultaneous monitoring of multiple health factors associated with the cardiopulmonary system including heart and respiratory rate, heart sounds, lung sounds, and body motion and position of an individual. The encapsulated accelerometer contact microphone (ACM) utilizes nano-gap transducers to achieve extraordinary sensitivity in a wide bandwidth (DC-12 kHz) with high dynamic range. The sensors were used to obtain health factors of six control subjects with varying body mass index, and their feasibility in detection of weak mechano-acoustic signals such as pathological heart sounds and shallow breathing patterns is evaluated on patients with preexisting conditions.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Feb 12, 2020
- Source ID
- 10.1038/s41746-020-0225-7
Entities
People
- Divya Gupta
- Farrokh Ayazi
- Mohammad J. Moghimi
- Omer T. Inan
- Pranav Gupta
- Yaesuk Jeong
Organizations
- Georgia Research Alliance
- National Institutes of Health
- United States Department of Defense
- United States Department of Health and Human Services