What is the common name for tympanic membranes?

Tympanic membranes are commonly known as ear drums. This name is used because they play a crucial role in hearing by vibrating in response to sound waves, which is essential for transmitting sound to the inner ear. The tympanic membrane acts as a boundary between the outer ear and the middle ear, facilitating the conduction of sound. The term "ear drum" is widely recognized and accurately reflects the shape and function of the tympanic membrane.

Other choices do not accurately describe tympanic membranes. Nasal passages are involved in respiration and the sense of smell, while inner ears and outer ears pertain to different anatomical structures unrelated to the tympanic membrane's function in hearing.