My laptop speakers are noisy. Which was not in Windows. Can anyone help me.
Can you please post the teriminal output for
sudo lshw -C multimedia
You can tweak more audio settings on AlsaMixer, that's accessible on terminal by entering alsamixer.
Here is the screenshot. I tried with alsamixer many times but it didn't work. Using laptop with low volume, speakers play clearly but if i increase the volume, the problem started with my speakers.
This list... well, then...
The hardware is at least detected. Working appears to be another matter entirely.
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How did you install Zorin; and did you do a reboot or shutdown before installing? Windows was taking over my sound bus when I did reboots before booting or installing..
I installed it as a second operating system. I made a bootable USB drive then i boot my laptop into boot menu and finally i installed it into another drive. That's it.
No, Over-Amplification is disabled.
@ridanul Have you explored alsamixer yet?
Maybe in alsamixer hit F6 to see what sound cards are listed and what controls appear for each. You can post a screenshot here so we can see what you have there. That may help diagnosis, but sound issues can sometinmes be challenging.
EDIT: I have done a bit more websearching but not turned up any certain fix. This item seems to relate to similar audio cards as you have:
Try this - boot into Windows, then shutdown; don't reboot. Had that with my dual-boot - drove me insane.. knew the driver worked cause there was a loud 'starting' sound when booting the USB lol.. Windows takes precedence over the sound bus, some new thing. If I just reboot into Zorin, no sound.. If I shutdown Windows before booting Zorin, no issues! I miss being able to install whatever distro I was going to use right from Windows 
just don't make em like they used to, heh..
It's something to try at least, free - I'm suspecting this is the cause though; especially with dual-boot.