So remember: The Cloud is a network of servers. Some servers provide an online service, like Adobe Creative Cloud, and others allow you to store and access data, like Instagram or Dropbox.he cloud is a network of servers, and each server has a different function. Some servers use computing power to run applications or deliver a service.. For example, Adobe recently moved its creative services to the cloud. You can no longer buy the Creative Suite (Photoshop, InDesign, etc.) in a box set.
siren. n. 1. (General Engineering) a device for emitting a loud wailing sound, esp as a warning or signal, typically consisting of a rotating perforated metal drum through which air or steam is passed under pressure.
The frequency of these bursts is the pitch of the siren. The siren in the diagram to the right is my dual-tone Model 2. To create two distinct tones, this siren has a two-level rotor and stator assembly. The top half of the rotor has 5 vanes, and the bottom half has only four. Side note: The above siren animation is way slowed down.