Nanocomposites Membranes for Acoustics Applications: A Virtual Noise Free Airplane Cabin

Abstract

The association in series of aerogel and nanomembranes seems to be effective for acoustic applications. The addition of carbon nanotubes to PVDF-TrFe solutions not only led to changes on fiber diameter but it also affected fiber’s spatial distribution. Such changes on fibers’ spatial distribution could be the main factor for variations on air flow resistivity. The best results, at 500-1500 Hz range, were obtained by the group with the smallest airflow resistivity. A possible explanation for such behavior could be that the air flow induced vibration of the nanomembrane itself. For aerospace applications, in special airplane cabins, the aero-nanomembranes composite seems to be a valuable solution as it can block up to 80 % of noise at 1500 Hz frequency range with a 60 mm thickness.