This word is affected by the sound shift.

He is an expert in musicology.

He is an expert in orthoepy, teaching pronunciation.

This room is covered with soundproofing material, so the sound doesn't leak outside.

He honked the car horn to get my attention.

His blood congealed with fear.

He said, 'Even if you die in the evening, it's okay if you ask the way in the morning,' teaching me the importance of living each day to the fullest.

His heart seems to have frozen.

He yielded to the pressure.

Infrasound is a type of sound that is inaudible to the human ear.