I absolutely adore the sound of the Huey. Speaking as a Vietnam vet, nearly every time I heard that sound, the chopper, and the brave men flying it, were coming either to protect my sorry butt, or to lift it out of the field and take it to a safer place.
In simpler, more direct, terms, the sound of a Huey usually meant good news. Plus, flying in them, with both doors wide open, was a hoot.
To this day, more than 40 years later, when I hear a Huey, I smile.
"People generally quarrel because they cannot argue." - G. K. Chesterton