A system for recording high fidelity cough sound measurements.
Goldsmith-WT; Reynolds-JS; McKinney-WG; Friend-KA; Shahan-D; Frazer-DG
Proceedings of the 3rd International Workshop on Biosignal Interpretation, Chicago, IL, June 12-14, 1999. Chicago, IL: University of Illinois 1999 Jun; :178-181
Cough sound analysis has the potential to assist with the diagnosis of lung disease. The purpose of this study was to construct and evaluate a system capable of recording high fidelity cough sound measurements. A cylindrical mouthpiece was attached to a 1" diameter metal tube with a microphone mounted tangent to the tube. Various terminations were connected to the distal end of the metal tube in order to minimize reflections and improve the total-to-background sound ratio. Terminations that were tested included: (1) assorted types of flexible tube materials, (2) various tube lengths, and (3) several types of anechoic terminations. Custom software was developed to capture and analyze the cough sound pressure waves. Simulated signals and cough sounds from volunteer subjects were recorded to characterize the response of the system. The recording system demonstrated marked improvement over prior methods in terms of expanded frequency response, minimal reflections and high total-to-background-ratios.
Lung; Breathing; Analytical-processes; Analytical-methods; Analytical-instruments; Statistical-analysis; Lung-disease; Lung-disorders; Respiratory-system-disorders; Respiratory-function-tests; Pulmonary-function-tests; Pulmonary-system-disorders; Pulmonary-disorders; Acoustical-measurements; Acoustics
Proceedings of the 3rd International Workshop on Biosignal Interpretation, Chicago, IL, June 12-14, 1999