Determination of the noise impact range of urban air mobility in urban areas using noise hemisphere

The noise problem associated with the introduction of urban air mobility (UAM) is a critical challenge that must be addressed. Currently, noise evaluation methods and standards for UAM are lacking. The present study, as an initial step towards establishing UAM noise evaluation criteria, aims to analyze the noise impact range based on actual UAM noise data and propose appropriate UAM noise measurement locations comparing them with existing aircraft noise measurement locations. Using soundplan software, the noise impact ranges of noise hemisphere were predicted within the K-UAM Grand Challenge. The results showed that the noise hemisphere exerted noise influence up to a horizontal radius of ∼400-600 m. Furthermore, appropriate UAM noise measurement locations for each region were proposed comparing the UAM noise impact assessment with existing aircraft noise measurement locations. The findings of the present study can be validated through the actual noise measurements during future UAM demonstrations and contribute to the development of UAM noise evaluation standards.