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this post was submitted on 25 Feb 2026
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I suspect most speakers are not designed to play inaudible frequencies.
They are, though. A popular example of this is the "mosquito tone" that young people can hear but older people can. And on the reverse, sub audible frequencies are often used for things like horror movies to add a sense of tension.
Most things that operate within a certain range are capable of operating outside of that range. You don't typically want the top and bottom of your used range to be the true max/min of the system. Internal combustion engines are a good example.
They are. Your ears are not designed to hear them. There is nothing special about high frequency noises. You just can't hear them.