Although closure typically depends upon learning, its application is often automatic and unconscious.

But for a person with a high frequency hearing loss, low frequency environmental noises often mask many of the remaining vowel sounds upon which they depend for important cues. Hence their hearing loss seems much worse than would be expected when there is a lot of noise
In all of these instances, to obtain the meaning, the brain must internally reconstruct the signal and fill in the missing parts.
This is one form of auditory closure. Sometimes, the closure is so automatic and efficient that we are hardly aware that some of the consonants are missing.
In the notes you will here a list of words with missing consonants. See if you can understand these words or tell which consonants are missing.