21. The ear canals also have numerous sebaceous glands. 22. Visible hair that protrudes from the ear canal is sometimes trimmed for cosmetic reasons. 23. The ear canals are jostled and jiggered by the studious avoidance of familiar harmonic guideposts. 24. But one of the devices that Kalinowski has developed fits entirely in the ear canal . 25. There may be some bleeding from the ear canal if the eardrum has been ruptured. 26. Also, the cotton head may fall off and become lodged in the ear canal . 27. Sound waves travel through the ear canal and hit the tympanic membrane, or eardrum. 28. Normally, the air pressure in the ear canal is the same as ambient pressure. 29. :: Passing urine through the urethra, as opposed to through the ear canal ? 30. The ear canal is not physically occluded by an earphone that operates via cartilage conduction.
