Chemical bonds do not store energy. Chemical bonds certainly contain potential energy, and the atoms want to move to a lower potential energy (become more stable). When methane, #CH_4#, forms, the valence electrons end up in more stable (lower energy) C-H bonds. These bonds are fairly strong, so methane is relatively inert.
Not to be confused with the secondary tympanic membrane of the round window. In human anatomy, the eardrum, or tympanic membrane, is a thin, cone-shaped membrane that separates the external ear from the middle ear in humans and other tetrapods. Its function is to transmit sound from the air to the ossicles inside the middle ear, and then to the oval window in the fluid-filled cochlea. Hence, it ultimately converts and amplifies vibration in air to vibration in fluid. The malleus bone bridges the gap between the eardrum and the other ossicles.
The eardrum can be examined by a physician using an instrument called an otoscope. A healthy eardrum is usually a pearl-gray color. Changes in the appearance of the eardrum including color are often an indication of illness or infection. In addition to color, the mobility of the eardrum is also assessed. A healthy eardrum remains flexible while a rigid, stiff eardrum may indicate an abnormal condition such as fluid in the ears. Diseases of the ears can also cause the eardrum to appear bulging or retracted. What Causes the Eardrum to Appear Red In medicine, redness is often an indication of irritation or inflammation. While many ear conditions can result in a red eardrum it should be noted that in the absence of other signs or symptoms a red eardrum alone may not indicate any kind of illness.