The use of sound devices emphasizes danger.
Step-by-step explanation:
This passage is from the "Treasure Island" written by Robert Louis Stevenson. The alarm of the silver green parrot who wakes up the pirates to alert them about the escaping protagonist.
This passage is taken from the chapter "Pieces of Eight", the sudden shrill voice that broke forth of the darkness was silver green parrot who woke everyone from their sound asleep to point out the figure leaping out in the dark. In deed, the use of the sound devices emphasizes danger, they are, signaling the fellowmen the rise of danger.