Auditory Perception

adjective describing something that cannot be heard

• The speaker's voice was so soft that it was almost unhearable in the large auditorium.
• I whispered a joke to my friend, but it was unhearable over the loud music.
• The sound of the car engine was unhearable with the windows rolled up.
• The truth was unhearable amidst all the lies and deception.

noun a visual or auditory hallucination that occurs in the absence of external stimuli

adjective describing something related to acoasma

• The acoasma experienced by the patient was a result of auditory hallucinations.
• I heard a strange acoasma last night while I was trying to sleep.
• That acoasma was so creepy, it gave me chills.
• The acoasma of fear whispered in her ears, causing her heart to race.