Moscow Aviation Institute (MAI) is developing a method for acoustic fine-tuning of passenger cabins, which can significantly improve noise comfort on board. The project, called "Vibroacoustics," aims to accurately identify areas where sound insulation or sound absorption needs to be enhanced, as well as to optimize the mass of acoustic materials without compromising comfort.
Particular attention is paid to long-haul aircraft, where the flight duration reaches 8-9 hours, and acoustic comfort becomes critical. According to Dmitry Strelets, Director of the "Aviation Technology" Institute at MAI, modern aircraft - especially business aviation - must meet more stringent noise requirements.
The methodology is based on spherical beamforming technology, which allows localizing noise sources inside the cabin with high spatial accuracy. Unlike the traditional intensitymetry method, which requires dismantling seats and provides only a superficial picture of the sound field, the new approach preserves the real configuration of the cabin and forms a three-dimensional map of the acoustic environment.
Tests are carried out on an experimental aircraft: researchers use both individual microphones and vibration sensors, as well as a spherical multi-microphone array. The data obtained allows developing recommendations for the redistribution of acoustic materials, ensuring maximum effect with minimal mass.
