Most of the noise in cities does come from cars. You're right that cities will never be <35 dBA, but most rural areas are not usually that quiet either. For exa

Most of the noise in cities does come from cars. You're right that cities will never be <35 dBA, but most rural areas are not usually that quiet either. For example, even slight wind will cause ambient noise in wilderness to 40-60 dBA. Cities without cars can easily average <55 dBA. See this video [1] or this research [2] for sources. [1] https://www.youtube.com/watch?v=CTV-wwszGw8 https://www.youtube.com/watch?v=CTV-wwszGw8 [2] https://www.easa.europa.eu/sites/default/files/dfu/Background_noise_report.pdf https://www.easa.europa.eu/sites/default/files/dfu/Backgroun...