A classification of how artificial-sounding robots in fiction are.
This scale classifies how "robotic" or "human" an artificial voice in fiction sounds.
Text to SpeechRobots sound like a consumer-grade voice synthesis program such as Microsoft Sam. Ironically, this is the most "realistic" depiction since that's what computer voices sound like today, but it's almost never seen (or heard) in fiction. When it is, it's often Played For Laughs, and may include references to real-life programs, such as the infamous SWAH bug.
Monotone HumanRobots sound like a human saying their lines with very little emotion or inflection. Expect to hear phrases like "does-not-compute" a lot. This was common in early sci-fi movies and TV shows, but nowadays is a Discredited Trope and is mostly Played For Laughs. This is what people often mean when they describe someone as "robotic"-sounding.
Borderline HumanRobots sound like humans saying their lines in an idiosyncratic or automated-sounding way, like a prerecorded message.
Filtered HumanRobots sound exactly like humans speaking through a voice filter.
Perfectly Human SoundingRobots sound just like humans and there are no audio cues to indicate that they're robots. This includes both emotional and emotionless voices, provided the voice itself sounds human.