A sound level meter fitted with a coupler was used to simulate the inner ear canal of an infant — no babies were used in this study. (localparent.ca)
Meanwhile, the vehicle emits a «pink noise» through the stereo that initiates the body's natural reaction to protect the inner ear canal. (digitaltrends.com)
If the middle or inner ear canal is infected, it's called otitis media or otitis interna. (vcahospitals.com)