American conservatism is a broad system of political beliefs in the United States that is characterized by respect for American traditions, support for Judeo-Christian values, economic liberalism, anti-communism, and a defense of Western culture.
The ear consists of three basic parts-the outer ear, the middle ear, and the inner ear. Each part of the ear serves a specific purpose in the task of detecting and interpreting sound. The outer ear serves to collect and channel sound to the middle ear. The middle ear serves to transform the energy of a sound wave into the internal vibrations of the bone structure of the middle ear and ultimately transform these vibrations into a compressional wave in the inner ear.
With the middle ear acting as an impedance-matching device, a majority of the energy of a sound wave moves on to the inner ear. In the case of a sound that is too loud, muscles attached to the ossicles can tense to decrease the proportion of the sound that is transferred and help to prevent damage to the inner ear. Connecting the middle ear to the throat s a short, narrow passage called the eustachian tube (Figure 1).