Final answer:
Supra-aural earphones are unlikely to cause a collapsed ear canal; this condition is typically due to injury and not the pressure exerted by these types of earphones.
Step-by-step explanation:
Supra-aural earphones are not typically associated with causing a collapsed ear canal. A collapsed ear canal can occur due to various factors, including trauma or injury, not usually from the use of earphones. Supra-aural earphones sit on the outer ear and do not exert the kind of pressure necessary to collapse an ear canal. A collapsed ear canal is a condition that may affect hearing acuity and could lead to conductive hearing loss, where sound vibrations are impeded on their way to the cochlea. In some cases, sending sound vibrations through the skull using bone conduction hearing aids can help overcome this type of hearing loss by bypassing the damaged external or middle ear.