Could I take your name and number, please? fleaandtickstuff.com The research – the first to analyse a very large population across multiple airports – found that, on average, zip codes with 10 decibel (dB) higher aircraft noise had a 3.5 percent higher cardiovascular hospital admission rate. The results showed that people exposed to the highest noise levels – more than 55 dB – had the strongest link with hospitalisations for heart disease, and the link also remained after adjustment for socioeconomic status, demographic factors, air pollution, and proximity to roads.