Blare (verb) زور دار چیخ، تیز چیخ

make or cause to make a loud, harsh sound.
Example: “the ambulance arrived outside, siren blaring”
Prelude (noun) آغاز کرنا، پیش خیمہ ہونا

an action or event serving as an introduction to something more important.
Example: “a ceasefire had been agreed as a prelude to full peace negotiations”