NASA is advancing research into how communities respond to emerging air taxi noise, as part of its broader efforts to support the safe integration of advanced air mobility (AAM) into everyday life. The study highlights how environmental context—particularly background noise levels—can influence public perception of next-generation aircraft.
The research, conducted under the Varied Advanced Air Mobility Noise and Geographic Area Response Difference (VANGARD) project, examined how individuals from different urban environments react to simulated air taxi sounds. The study involved 359 participants across major U.S. metropolitan areas including Los Angeles, New York City, and the Dallas-Fort Worth region.
Participants were exposed to 67 unique aircraft sound profiles representing various air taxi concepts. To ensure unbiased responses, researchers did not disclose aircraft manufacturers or provide visual references, focusing solely on auditory perception. Participants rated their level of annoyance for each sound, while their residential locations were categorized based on background noise levels.
Initial findings revealed an unexpected trend: individuals living in noisier urban environments reported higher levels of annoyance to air taxi sounds compared to those in quieter suburban areas. Researchers hypothesize that people accustomed to constant background noise may be more sensitive to additional or unfamiliar sound sources.
The study was led by Sidd Krishnamurthy at NASA Langley Research Center, who emphasized the importance of understanding human responses as new aviation technologies emerge. He noted that the findings will help refine predictive models of community noise impact and guide the design and operational planning of future aircraft.
Most participants completed the study remotely using personal audio devices in their home environments, while a smaller control group participated in a controlled setting at NASA Langley. Results from both groups were consistent, reinforcing the reliability of the findings.
While the research does not address all variables—such as how background noise might mask aircraft sounds—it provides valuable early insights into how communities may perceive air taxi operations. These insights are critical as urban air mobility systems move closer to commercialization.
The VANGARD study is part of NASA’s Revolutionary Vertical Lift Technology project under the Advanced Air Vehicles Program within its Aeronautics Research Mission Directorate. The findings will support aircraft designers, policymakers, and regulators in determining where and how air taxis can operate with minimal community disruption.
As advanced air mobility continues to evolve, understanding public acceptance—especially regarding noise—will be essential to ensuring successful integration into urban and suburban environments.
