“Can a sedated person hear you?”

Yes

Yes

The answer depends on exactly what is meant by your question, and there is no east, straight answer. If you are asking if the mechanism inside the ears, which transduces the sounds coming into the ears into a neurologic signal for the brain to interpret as sound still works, then the answer is yes. However, the ability to transmit that information along the neural pathways and into the brain so that there is a conscious recognition of being able to "hear" and even to understand what those "sounds" mean, then the answer is probably no, if the patient in question is heavily sedated. Under light planes of sedation, certainly in most situations the lightly sedated person can hear and even understand sounds. Think of this as the situation when someone had a couple of drinks of an alcoholic beverage...in that situation, certainly, a person can still hear and understand spoken language, and often even respond correctly to many questions. However, as the degree of intoxication from ingestion of alcoholic beverages becomes greater, the ability to understand and respond appropriately becomes progressively lost. This not only occurs with ingestion of alcohol into the body, but also occurs in a similar manner whenever other sedation agents are administered. At some point, the level of sedation becomes intense enough that the individual will lose the ability to understand the sounds and to respond to them, even though the sounds may still come into the ears and be transmitted to the brain.

Yes

It is possible to hear while sedated. Depends on the level of sedation. Usually possible with level 1 and 2 level, 3 maybe, and level 4 usually not.