The most characteristic harmonica sound we hear today is the blues-harp style, developed by the Afro-Americans. It uses soulful note bending to give that bluesy wailing sound we all associate with the harp. You often hear it in contemporary American styles like Blues, Jazz, Country and Rock. However the free-reed that makes the sound in harmonicas is thousands of years old, first documented in ancient Chinese literature. It has long been used in traditional Chinese folk instruments like the Hulusi, Bawu, Sheng etc.
A Global Icon. The Hollywood Sign: It's more than just nine white letters spelling out a city's name; it's one of the world's most evocative symbols â a universal metaphor for ambition, success, glamour...for this dazzling place, industry and dream we call H-O-L-L-Y-W-O-O-D.
Probally can - it mostly depends on how much time you want to spend at Universal Studios(might need a couple days to see everything) and wether you want to shop on Rodeo Dr. or just look around. For the Hollywood sign - I assume you mean you want to hike to it, since it is visible from most places in Los Angeles.