Squeel noise stopped belt

Sounds like you have a slipping belt, but it should have nothing at all to do with the horn. slipping belts squeal. You need a can of this. Apply it twice a day apart.

MotoMaster Belt-Dressing, 170-g - Canadian Tire

https://www.canadiantire.ca > Automotive > Car Cleaning
Mar 13, 2022 - FEATURES. MotoMaster Belt-Dressing stops belt slippage and squealing; For use on automotive, marine, industrial and home; Size: 170 g ...
Package Width (cm): 5.30 cm
Package Weight (kg): 0.33 kg Rating: 3.4 · ‎$7.99 · ‎In stock


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Change the belt and check for bad bearings in the Alternator pulley and all the other pulleys that the belt rides on sounds like it could be dragging causing your belt squeal or your belt is worn too good luck.

Most likely a belt problem or a worn out tensioner. You left off the year, make, model and engine so it's a guessing gamet. Read this post on how to track down the source of noise

http://ricksfreeautorepairadvice.com/diagnose-squeak-noise-creaks-and-squeals/
Diagnose squeaks creaks and squeals

put belt dressing on belt it will stop squeeling.

Try replacing belt.

Be gentle with my rating. I am a long ways away. It sounds like a fan belt. You should pop the hood next time and see how it sounds when you have the squeeling going on. Fan belts will squeel until the get warmed up and then stop because the heat makes them grab the way they are ment too. Let me know, Raz

Try using a very small spray of silicone spray on the belt next time you're hearing the squeal. If it temporarily stops, replace the belt. Check the p/s fluid level, if it's low it could cause the pump to make noise. Also if it's low, you have a leak, check all lines, connections and pull back the bellows boots on the p/s rack (if rack and pinion). Finally, pick yourself up a mechanic's stethescope, good tool for diagnosing accesory noises. Listen to all components while duplicating the noise.

Your belt is loose (and it just needs tightening) or it is worn and needs to be replaced. It may look ok but they glaze over; all the little ridges get shinny and slip.

Check the belts for slippage and wear. If the tension is not correct, the belts will slip and create a "squealing" noise...moreso at higher rpms or on acceleration as you mentioned....That is the most common cause for a "squeel". I would check that first.
Good luck...i hope this helps fixya up.

sounds like a loose belt!!