Investigating sound frequency effects on human physiology in microgravity

Methods

Summary

This project will utilize supervised parabolic flight operations to simulate short-duration microgravity conditions while evaluating human physiological and sensory response to controlled sound frequency and vibroacoustic exposure. Methods include biomonitoring observation, participant sensory feedback, and structured in-flight testing conducted through the Microgravity Human Test Subjects program. The project incorporates astronautics training, crew resource management, space suit operations, and established flight safety and human research protocols.

Challenges

Anticipated challenges include limited microgravity time during parabolic flight, motion sensitivity, equipment performance in flight conditions, and variability in human physiological response. These risks will be addressed through pre-flight equipment testing, a simplified repeatable protocol, clear safety procedures, and backup data collection methods such as participant observations and post-flight feedback. The project will remain exploratory to account for the unique constraints of microgravity research.

Pre Analysis Plan

This exploratory study will compare baseline, in-flight, and post-flight observations of physiological and sensory response during controlled sound frequency exposure in simulated microgravity. The primary hypothesis is that vibroacoustic stimulation may support relaxation or stress regulation during microgravity exposure. Outcomes may include biomonitoring trends, perceived relaxation, sensory response, and participant feedback. Because data may be limited and variable, findings will be analyzed descriptively, with emphasis on observed patterns, feasibility, and recommendations for future studies.