In a deserted alley, a detective hears a voice echoing his own words. But there’s no one around. What is the source of this eerie sound?
Category: Mystery · Difficulty: hard
Hint: Think about technology that can mimic sounds.
Answer
A hidden speaker
Explanation
The hidden speaker could be used to create an unsettling atmosphere, suggesting someone is manipulating the environment.
This is a hard mystery riddle — a tricky one that takes a little thought. The answer is A hidden speaker.
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