They aren’t this loud in France or Netherlands for example.
i believe they’ve got louder with new sirens fitted at some point over the years designed to be felt as well as heard within modern insulated cars.
I have found this petition on line & will sign.
Please sign if this bothers you too.
( if link won’t post then google 38 degrees petition for regulation of emergency sirens )
you.38degrees.org.uk/petitions/for-a-regulation-of-emergency-sirens?share=14dc8291-a230-450a-acd0-4ce9feb43efe&source=&utm_source=