From Fox news…
“In a report published last month, the Neighborhood Environmental Survey (NES), conducted by the Federal Aviation Administration (FAA), found that nearly two-thirds of people polled were “highly annoyed” by aviation noise — even more than road traffic or noise from their neighbors.
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Compared with prior studies, the national curve showed “substantially more people highly annoyed for a given Day-Night Average Sound Level (DNL) aircraft noise exposure level,” researchers said. The most recent study of human annoyance on aircraft noise by the U.S. government – conducted in 1992 – found that just 12.3% were irritated by the same DNL of 65 dB.”
https://www.foxnews.com/travel/faa-study-americans-highly-annoyed-aircraft-noise
Hawthorne Quiet Skies 