reident seeking guidance on noise-blocking windows

From a Quincy Place NW resident:

Hello! I`m wondering if anyone in the neighborhood has installed windows that block out noise? I`m having a hard time sleeping thanks to unreasonably loud HVAC units located outside my bedroom window. The property manager refuses to do anything about it.

As I plead with him to be a kind neighbor and move his HVAC units, I`m starting to research options for getting a noise-resistant window with double-pane glass or vinyl frames... or perhaps placing a second window behind or inside my existing window.

The information I`ve found so far is pretty confusing. Does anyone have recommendations for what to do or which company to work with? Thank you.