Structure can have different meanings, but Timbre infers tone, not duration
the way it is high and low
No
the way it is high and low
Your speaker could have blown.
Yes, attack refers to the initial build-up of a sound, while decay refers to the decrease in sound level after reaching its peak. Attack determines how quickly a sound reaches full volume, and decay determines how quickly it fades away.
it means you should see a doctor
It is probably stressed and scared to an extreme amount.
Your probably spotting
Yes, a switch is a device that stops and starts current flow in a circuit.
Bad battery, most likely.
The starter.