noun
a plural form of the noun acoasma, which refers to an auditory hallucination or sound perceived without an external stimulus
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The scientist studied the phenomenon of acoasmata in great detail.
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I heard that acoasmata can be quite fascinating to learn about.
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Acoasmata are like, really weird auditory hallucinations, dude.
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The silence in the room was so intense, it felt like acoasmata were echoing in my ears.